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 <div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.tamaya</a></div>
 <h2 title="Interface Configuration" class="title">Interface Configuration</h2>
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 <dt>All Known Subinterfaces:</dt>
 <dd><code><a href="ConfigurationSnapshot.html" title="interface in org.apache.tamaya">ConfigurationSnapshot</a></code></dd>
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 <dt>All Known Implementing Classes:</dt>
 <dd><code><a href="core/internal/CoreConfiguration.html" title="class in org.apache.tamaya.core.internal">CoreConfiguration</a></code>, <code><a href="spisupport/DefaultConfiguration.html" title="class in org.apache.tamaya.spisupport">DefaultConfiguration</a></code>, <code><a href="spisupport/DefaultConfigurationSnapshot.html" title="class in org.apache.tamaya.spisupport">DefaultConfigurationSnapshot</a></code></dd>
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 <pre>public interface <span class="typeNameLabel">Configuration</span></pre>
 <div class="block"><p>A configuration models an aggregated setPropertyValue of current properties, identified by
  a unique key, but adds higher level access functions to
  a <a href="spi/PropertySource.html" title="interface in org.apache.tamaya.spi"><code>PropertySource</code></a>. Hereby in most
  cases a configuration is a wrapper around a composite
  <a href="spi/PropertySource.html" title="interface in org.apache.tamaya.spi"><code>PropertySource</code></a> instance, which may combine
  multiple child configurations in a well defined tree like structure,
  where nodes define logically the rules' current priority, filtering,
  combination and overriding.
  </p>
  <h3>Implementation Requirements</h3>
  Implementations of this interface must be
  <ul>
   <li>Thread safe</li>
   <li>Immutable</li>
  </ul>

  <p>It is not recommended that implementations also are serializable, since the any configuration can be <i>frozen</i>
  by reading out its complete configuration mapProperties into a serializable and remotable structure. This helps significantly
  by simplifying the development of this interface, e.g. for being backed up by systems and stores that are not part of
  this library at all.</p></div>
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 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colSecond" scope="col">Field</th>
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 <td class="colFirst"><code>static <a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#EMPTY">EMPTY</a></span></code></th>
 <td class="colLast">
 <div class="block">Immutable and reusable, thread-safe implementation of an empty propertySource.</div>
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 <th class="colSecond" scope="col">Method</th>
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 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code>default &lt;T&gt;&nbsp;T</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#adapt(java.util.function.Function)">adapt</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function" class="externalLink">Function</a>&lt;<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>,&#8203;T&gt;&nbsp;query)</code></th>
 <td class="colLast">
 <div class="block">Query a configuration.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>static <a href="spi/ConfigurationBuilder.html" title="interface in org.apache.tamaya.spi">ConfigurationBuilder</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createConfigurationBuilder()">createConfigurationBuilder</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Access a new configuration builder initialized with the current thread's context classloader.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>static <a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#current()">current</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Access the configuration instance for the current thread's context classloader.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>static <a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#current(java.lang.ClassLoader)">current</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang" class="externalLink">ClassLoader</a>&nbsp;classloader)</code></th>
 <td class="colLast">
 <div class="block">Accesses the configuration for a given classloader.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>default <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get(java.lang.Iterable)">get</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys)</code></th>
 <td class="colLast">
 <div class="block">Access a property.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>default &lt;T&gt;&nbsp;T</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get(java.lang.Iterable,java.lang.Class)">get</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys,
    <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;T&gt;&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Gets the property keys as type T.</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code>default &lt;T&gt;&nbsp;T</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get(java.lang.Iterable,org.apache.tamaya.TypeLiteral)">get</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys,
    <a href="TypeLiteral.html" title="class in org.apache.tamaya">TypeLiteral</a>&lt;T&gt;&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Get the property keys as type T.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code>default <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get(java.lang.String)">get</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key)</code></th>
 <td class="colLast">
 <div class="block">Access a property.</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>default &lt;T&gt;&nbsp;T</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get(java.lang.String,java.lang.Class)">get</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key,
    <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;T&gt;&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Gets the property keys as type T.</div>
 </td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>&lt;T&gt;&nbsp;T</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get(java.lang.String,org.apache.tamaya.TypeLiteral)">get</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key,
    <a href="TypeLiteral.html" title="class in org.apache.tamaya">TypeLiteral</a>&lt;T&gt;&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Get the property keys as type T.</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code><a href="spi/ConfigurationContext.html" title="interface in org.apache.tamaya.spi">ConfigurationContext</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getContext()">getContext</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Access a configuration's context.</div>
 </td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code>default <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOptional(java.lang.Iterable)">getOptional</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys)</code></th>
 <td class="colLast">
 <div class="block">Access a String property, using an an <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> instance.</div>
 </td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code>default &lt;T&gt;&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink">Optional</a>&lt;T&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOptional(java.lang.Iterable,java.lang.Class)">getOptional</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys,
            <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;T&gt;&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Access a property, using an an <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> instance.</div>
 </td>
 </tr>
 <tr id="i13" class="rowColor">
 <td class="colFirst"><code>default &lt;T&gt;&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink">Optional</a>&lt;T&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOptional(java.lang.Iterable,org.apache.tamaya.TypeLiteral)">getOptional</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys,
            <a href="TypeLiteral.html" title="class in org.apache.tamaya">TypeLiteral</a>&lt;T&gt;&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Access a property, using an an <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> instance.</div>
 </td>
 </tr>
 <tr id="i14" class="altColor">
 <td class="colFirst"><code>default <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOptional(java.lang.String)">getOptional</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key)</code></th>
 <td class="colLast">
 <div class="block">Access a String property, using an an <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> instance.</div>
 </td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code>default &lt;T&gt;&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink">Optional</a>&lt;T&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOptional(java.lang.String,java.lang.Class)">getOptional</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key,
            <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;T&gt;&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Access a property, using an an <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> instance.</div>
 </td>
 </tr>
 <tr id="i16" class="altColor">
 <td class="colFirst"><code>default &lt;T&gt;&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink">Optional</a>&lt;T&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOptional(java.lang.String,org.apache.tamaya.TypeLiteral)">getOptional</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key,
            <a href="TypeLiteral.html" title="class in org.apache.tamaya">TypeLiteral</a>&lt;T&gt;&nbsp;type)</code></th>
 <td class="colLast">
 <div class="block">Access a property, using an an <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> instance.</div>
 </td>
 </tr>
 <tr id="i17" class="rowColor">
 <td class="colFirst"><code>default &lt;T&gt;&nbsp;T</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOrDefault(java.lang.Iterable,java.lang.Class,T)">getOrDefault</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys,
             <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;T&gt;&nbsp;type,
             T&nbsp;defaultValue)</code></th>
 <td class="colLast">
 <div class="block">Gets the property keys as type T.</div>
 </td>
 </tr>
 <tr id="i18" class="altColor">
 <td class="colFirst"><code>default <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOrDefault(java.lang.Iterable,java.lang.String)">getOrDefault</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys,
             <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;defaultValue)</code></th>
 <td class="colLast">
 <div class="block">Access a property.</div>
 </td>
 </tr>
 <tr id="i19" class="rowColor">
 <td class="colFirst"><code>default &lt;T&gt;&nbsp;T</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOrDefault(java.lang.Iterable,org.apache.tamaya.TypeLiteral,T)">getOrDefault</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys,
             <a href="TypeLiteral.html" title="class in org.apache.tamaya">TypeLiteral</a>&lt;T&gt;&nbsp;type,
             T&nbsp;defaultValue)</code></th>
 <td class="colLast">
 <div class="block">Get the property keys as type T.</div>
 </td>
 </tr>
 <tr id="i20" class="altColor">
 <td class="colFirst"><code>default &lt;T&gt;&nbsp;T</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOrDefault(java.lang.String,java.lang.Class,T)">getOrDefault</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key,
             <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;T&gt;&nbsp;type,
             T&nbsp;defaultValue)</code></th>
 <td class="colLast">
 <div class="block">Gets the property keys as type T.</div>
 </td>
 </tr>
 <tr id="i21" class="rowColor">
 <td class="colFirst"><code>default <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOrDefault(java.lang.String,java.lang.String)">getOrDefault</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key,
             <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;defaultValue)</code></th>
 <td class="colLast">
 <div class="block">Access a property.</div>
 </td>
 </tr>
 <tr id="i22" class="altColor">
 <td class="colFirst"><code>&lt;T&gt;&nbsp;T</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOrDefault(java.lang.String,org.apache.tamaya.TypeLiteral,T)">getOrDefault</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key,
             <a href="TypeLiteral.html" title="class in org.apache.tamaya">TypeLiteral</a>&lt;T&gt;&nbsp;type,
             T&nbsp;defaultValue)</code></th>
 <td class="colLast">
 <div class="block">Get the property keys as type T.</div>
 </td>
 </tr>
 <tr id="i23" class="rowColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util" class="externalLink">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>,&#8203;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getProperties()">getProperties</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Access all currently known configuration properties as a full <code>Map&lt;String,String&gt;</code>.</div>
 </td>
 </tr>
 <tr id="i24" class="altColor">
 <td class="colFirst"><code><a href="ConfigurationSnapshot.html" title="interface in org.apache.tamaya">ConfigurationSnapshot</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSnapshot(java.lang.Iterable)">getSnapshot</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys)</code></th>
 <td class="colLast">
 <div class="block">Create a snapshot, which contains the given keys.</div>
 </td>
 </tr>
 <tr id="i25" class="rowColor">
 <td class="colFirst"><code>default <a href="ConfigurationSnapshot.html" title="interface in org.apache.tamaya">ConfigurationSnapshot</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSnapshot(java.lang.String...)">getSnapshot</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>...&nbsp;keys)</code></th>
 <td class="colLast">
 <div class="block">Create a snapshot, which contains all known keys.</div>
 </td>
 </tr>
 <tr id="i26" class="altColor">
 <td class="colFirst"><code>default <a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#map(java.util.function.UnaryOperator)">map</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/UnaryOperator.html?is-external=true" title="class or interface in java.util.function" class="externalLink">UnaryOperator</a>&lt;<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>&gt;&nbsp;operator)</code></th>
 <td class="colLast">
 <div class="block">Extension point for adjusting configuration.</div>
 </td>
 </tr>
 <tr id="i27" class="rowColor">
 <td class="colFirst"><code>default &lt;T&gt;&nbsp;T</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#query(org.apache.tamaya.ConfigQuery)">query</a></span>&#8203;(<a href="ConfigQuery.html" title="interface in org.apache.tamaya">ConfigQuery</a>&lt;T&gt;&nbsp;query)</code></th>
 <td class="colLast">
 <div class="block"><span class="deprecatedLabel">Deprecated.</span>
 <div class="deprecationComment">Use <a href="#adapt(java.util.function.Function)"><code>adapt(Function)</code></a></div>
 </div>
 </td>
 </tr>
 <tr id="i28" class="altColor">
 <td class="colFirst"><code>static <a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#releaseConfiguration(java.lang.ClassLoader)">releaseConfiguration</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang" class="externalLink">ClassLoader</a>&nbsp;classloader)</code></th>
 <td class="colLast">
 <div class="block">Releases the configuration associated with the given classloader.</div>
 </td>
 </tr>
 <tr id="i29" class="rowColor">
 <td class="colFirst"><code>static void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setCurrent(org.apache.tamaya.Configuration)">setCurrent</a></span>&#8203;(<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>&nbsp;config)</code></th>
 <td class="colLast">
 <div class="block">This method allows replacement of the current default <a href="Configuration.html" title="interface in org.apache.tamaya"><code>Configuration</code></a> with a new
  instance.</div>
 </td>
 </tr>
 <tr id="i30" class="altColor">
 <td class="colFirst"><code>static void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setCurrent(org.apache.tamaya.Configuration,java.lang.ClassLoader)">setCurrent</a></span>&#8203;(<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>&nbsp;config,
           <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang" class="externalLink">ClassLoader</a>&nbsp;classLoader)</code></th>
 <td class="colLast">
 <div class="block">This method allows replacement of the current default <a href="Configuration.html" title="interface in org.apache.tamaya"><code>Configuration</code></a> with a new
  instance.</div>
 </td>
 </tr>
 <tr id="i31" class="rowColor">
 <td class="colFirst"><code>default <a href="spi/ConfigurationBuilder.html" title="interface in org.apache.tamaya.spi">ConfigurationBuilder</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toBuilder()">toBuilder</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Create a new builder using this instance as its base.</div>
 </td>
 </tr>
 <tr id="i32" class="altColor">
 <td class="colFirst"><code>default <a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#with(org.apache.tamaya.ConfigOperator)">with</a></span>&#8203;(<a href="ConfigOperator.html" title="interface in org.apache.tamaya">ConfigOperator</a>&nbsp;operator)</code></th>
 <td class="colLast">
 <div class="block"><span class="deprecatedLabel">Deprecated.</span>
 <div class="deprecationComment">use <a href="#map(java.util.function.UnaryOperator)"><code>map(UnaryOperator)</code></a></div>
 </div>
 </td>
 </tr>
 </table>
 </li>
 </ul>
 </section>
 </li>
 </ul>
 </div>
 <div class="details">
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 <h4>EMPTY</h4>
 <pre>static final&nbsp;<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a> EMPTY</pre>
 <div class="block">Immutable and reusable, thread-safe implementation of an empty propertySource.</div>
 </li>
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 <pre class="methodSignature">default&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;get&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key)</pre>
 <div class="block">Access a property.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - the property's key, not <code>null</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property's value.</dd>
 </dl>
 </li>
 </ul>
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 <h4>get</h4>
 <pre class="methodSignature">default&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;get&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys)</pre>
 <div class="block">Access a property.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keys</code> - the property's keys, in order of evaluation, not <code>null</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property's value.</dd>
 </dl>
 </li>
 </ul>
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 <pre class="methodSignature">default&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;getOrDefault&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key,
                             <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;defaultValue)</pre>
 <div class="block">Access a property.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - the property's key, not <code>null</code>.</dd>
 <dd><code>defaultValue</code> - value to be returned, if no value is present, not <code>null</code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property's keys.</dd>
 </dl>
 </li>
 </ul>
 <a id="getOrDefault(java.lang.Iterable,java.lang.String)">
 <!--   -->
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 <pre class="methodSignature">default&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;getOrDefault&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys,
                             <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;defaultValue)</pre>
 <div class="block">Access a property.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keys</code> - the property's keys, in order of evaluation, not <code>null</code>.</dd>
 <dd><code>defaultValue</code> - value to be returned, if no value is present, not <code>null</code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property's keys.</dd>
 </dl>
 </li>
 </ul>
 <a id="getOptional(java.lang.String)">
 <!--   -->
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 <h4>getOptional</h4>
 <pre class="methodSignature">default&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;getOptional&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key)</pre>
 <div class="block">Access a String property, using an an <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> instance.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - the property's key, not <code>null</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property's keys.</dd>
 </dl>
 </li>
 </ul>
 <a id="getOptional(java.lang.Iterable)">
 <!--   -->
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 <h4>getOptional</h4>
 <pre class="methodSignature">default&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink">Optional</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;getOptional&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys)</pre>
 <div class="block">Access a String property, using an an <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> instance.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keys</code> - the property's keys, in evaluation order, not <code>null</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property's keys.</dd>
 </dl>
 </li>
 </ul>
 <a id="getOptional(java.lang.String,java.lang.Class)">
 <!--   -->
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 <pre class="methodSignature">default&nbsp;&lt;T&gt;&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink">Optional</a>&lt;T&gt;&nbsp;getOptional&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key,
                                     <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;T&gt;&nbsp;type)</pre>
 <div class="block">Access a property, using an an <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> instance.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the class modeled by the type parameter</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - the property's key, not <code>null</code>.</dd>
 <dd><code>type</code> - the target type, not null.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property's keys.</dd>
 </dl>
 </li>
 </ul>
 <a id="getOptional(java.lang.Iterable,java.lang.Class)">
 <!--   -->
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 <h4>getOptional</h4>
 <pre class="methodSignature">default&nbsp;&lt;T&gt;&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink">Optional</a>&lt;T&gt;&nbsp;getOptional&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys,
                                     <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;T&gt;&nbsp;type)</pre>
 <div class="block">Access a property, using an an <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> instance.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the class modeled by the type parameter</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keys</code> - the property's keys, in evaluation order, not <code>null</code>.</dd>
 <dd><code>type</code> - the target type, not null.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property's keys.</dd>
 </dl>
 </li>
 </ul>
 <a id="getOptional(java.lang.String,org.apache.tamaya.TypeLiteral)">
 <!--   -->
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 <pre class="methodSignature">default&nbsp;&lt;T&gt;&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink">Optional</a>&lt;T&gt;&nbsp;getOptional&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key,
                                     <a href="TypeLiteral.html" title="class in org.apache.tamaya">TypeLiteral</a>&lt;T&gt;&nbsp;type)</pre>
 <div class="block">Access a property, using an an <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> instance.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the class modeled by the type parameter</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - the property's key, not <code>null</code>.</dd>
 <dd><code>type</code> - the target type, not null.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property's keys.</dd>
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 <div class="block">Access a property, using an an <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> instance.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the class modeled by the type parameter</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keys</code> - the property's keys, in evaluation order, not <code>null</code>.</dd>
 <dd><code>type</code> - the target type, not null.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property's keys.</dd>
 </dl>
 </li>
 </ul>
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                            T&nbsp;defaultValue)</pre>
 <div class="block">Gets the property keys as type T. This will implicitly require a corresponding <a href="spi/PropertyConverter.html" title="interface in org.apache.tamaya.spi"><code>PropertyConverter</code></a> to be available that is capable of providing type T
  fromMap for the given String keys.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the class modeled by the type parameter</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - the property's absolute, or relative path, e.g. <code>
                      a/b/c/d.myProperty</code>, not  <code>null</code>.</dd>
 <dd><code>type</code> - The target type required, not  <code>null</code>.</dd>
 <dd><code>defaultValue</code> - value to be used, if no value is present, not <code>null</code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property value, never <code>null</code>.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="ConfigException.html" title="class in org.apache.tamaya">ConfigException</a></code> - if the keys could not be converted to the required target type.</dd>
 </dl>
 </li>
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                            <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;T&gt;&nbsp;type,
                            T&nbsp;defaultValue)</pre>
 <div class="block">Gets the property keys as type T. This will implicitly require a corresponding <a href="spi/PropertyConverter.html" title="interface in org.apache.tamaya.spi"><code>PropertyConverter</code></a> to be available that is capable of providing type T
  fromMap for the given String keys.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the class modeled by the type parameter</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keys</code> - the property's keys, in evaluation order, not <code>null</code>.</dd>
 <dd><code>type</code> - The target type required, not  <code>null</code>.</dd>
 <dd><code>defaultValue</code> - value to be used, if no value is present, not <code>null</code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property value, never <code>null</code>.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="ConfigException.html" title="class in org.apache.tamaya">ConfigException</a></code> - if the keys could not be converted to the required target type.</dd>
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 <pre class="methodSignature">default&nbsp;&lt;T&gt;&nbsp;T&nbsp;get&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key,
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 <div class="block">Gets the property keys as type T. This will implicitly require a corresponding <a href="spi/PropertyConverter.html" title="interface in org.apache.tamaya.spi"><code>PropertyConverter</code></a> to be available that is capable of providing type T
  fromMap for the given String keys.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the class modeled by the type parameter</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - the property's absolute, or relative path, e.g. @code
                      a/b/c/d.myProperty}.</dd>
 <dd><code>type</code> - The target type required, not <code>null</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property value, never <code>null</code>.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="ConfigException.html" title="class in org.apache.tamaya">ConfigException</a></code> - if the keys could not be converted to the required target type.</dd>
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 <div class="block">Gets the property keys as type T. This will implicitly require a corresponding <a href="spi/PropertyConverter.html" title="interface in org.apache.tamaya.spi"><code>PropertyConverter</code></a> to be available that is capable of providing type T
  fromMap for the given String keys.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the class modeled by the type parameter</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keys</code> - the property's keys, in evaluation order, not <code>null</code>.</dd>
 <dd><code>type</code> - The target type required, not <code>null</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property value, never <code>null</code>.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="ConfigException.html" title="class in org.apache.tamaya">ConfigException</a></code> - if the keys could not be converted to the required target type.</dd>
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           <a href="TypeLiteral.html" title="class in org.apache.tamaya">TypeLiteral</a>&lt;T&gt;&nbsp;type)</pre>
 <div class="block">Get the property keys as type T. This will implicitly require a corresponding <a href="spi/PropertyConverter.html" title="interface in org.apache.tamaya.spi"><code>PropertyConverter</code></a> to be available that is capable of providing type T
  literals for the given key.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the type literal</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - the property's absolute, or relative path, e.g. @code
                      a/b/c/d.myProperty}, not <code>null</code>.</dd>
 <dd><code>type</code> - The target type required, not <code>null</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property value, never <code>null</code>.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="ConfigException.html" title="class in org.apache.tamaya">ConfigException</a></code> - if the keys could not be converted to the required target type.</dd>
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 <pre class="methodSignature">default&nbsp;&lt;T&gt;&nbsp;T&nbsp;get&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys,
                   <a href="TypeLiteral.html" title="class in org.apache.tamaya">TypeLiteral</a>&lt;T&gt;&nbsp;type)</pre>
 <div class="block">Get the property keys as type T. This will implicitly require a corresponding <a href="spi/PropertyConverter.html" title="interface in org.apache.tamaya.spi"><code>PropertyConverter</code></a> to be available that is capable of providing type T
  literals for the given key.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the type literal</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keys</code> - the property's keys, in evaluation order, not <code>null</code>.</dd>
 <dd><code>type</code> - The target type required, not <code>null</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property value, never <code>null</code>.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="ConfigException.html" title="class in org.apache.tamaya">ConfigException</a></code> - if the keys could not be converted to the required target type.</dd>
 </dl>
 </li>
 </ul>
 <a id="getOrDefault(java.lang.String,org.apache.tamaya.TypeLiteral,java.lang.Object)">
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 <pre class="methodSignature">&lt;T&gt;&nbsp;T&nbsp;getOrDefault&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key,
                    <a href="TypeLiteral.html" title="class in org.apache.tamaya">TypeLiteral</a>&lt;T&gt;&nbsp;type,
                    T&nbsp;defaultValue)</pre>
 <div class="block">Get the property keys as type T. This will implicitly require a corresponding <a href="spi/PropertyConverter.html" title="interface in org.apache.tamaya.spi"><code>PropertyConverter</code></a> to be available that is capable of providing type T
  literals for the given key.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the type literal</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - the property's absolute, or relative path, e.g.
                      <code>a/b/c/d.myProperty</code>, not <code>null</code>.</dd>
 <dd><code>type</code> - The target type required, not <code>null</code>.</dd>
 <dd><code>defaultValue</code> - default value to be used, if no value is present.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property value, never null.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="ConfigException.html" title="class in org.apache.tamaya">ConfigException</a></code> - if the keys could not be converted to the required target type.</dd>
 </dl>
 </li>
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 <a id="getOrDefault(java.lang.Iterable,org.apache.tamaya.TypeLiteral,java.lang.Object)">
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 <pre class="methodSignature">default&nbsp;&lt;T&gt;&nbsp;T&nbsp;getOrDefault&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys,
                            <a href="TypeLiteral.html" title="class in org.apache.tamaya">TypeLiteral</a>&lt;T&gt;&nbsp;type,
                            T&nbsp;defaultValue)</pre>
 <div class="block">Get the property keys as type T. This will implicitly require a corresponding <a href="spi/PropertyConverter.html" title="interface in org.apache.tamaya.spi"><code>PropertyConverter</code></a> to be available that is capable of providing type T
  literals for the given key.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the type literal</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keys</code> - the property's keys, in evaluation order, not <code>null</code>.</dd>
 <dd><code>type</code> - The target type required, not <code>null</code>.</dd>
 <dd><code>defaultValue</code> - default value to be used, if no value is present.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the property value, never null.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="ConfigException.html" title="class in org.apache.tamaya">ConfigException</a></code> - if the keys could not be converted to the required target type.</dd>
 </dl>
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 <pre class="methodSignature"><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util" class="externalLink">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>,&#8203;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;getProperties()</pre>
 <div class="block">Access all currently known configuration properties as a full <code>Map&lt;String,String&gt;</code>.
  Be aware that entries from non scannable parts of the registered <a href="spi/PropertySource.html" title="interface in org.apache.tamaya.spi"><code>PropertySource</code></a>
  instances may not be contained in the result, but nevertheless be accessible by calling one of the
  <code>current(...)</code> methods.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>all currently known configuration properties.</dd>
 </dl>
 </li>
 </ul>
 <a id="with(org.apache.tamaya.ConfigOperator)">
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 </a>
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 <h4>with</h4>
 <pre class="methodSignature"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink">@Deprecated</a>
 default&nbsp;<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>&nbsp;with&#8203;(<a href="ConfigOperator.html" title="interface in org.apache.tamaya">ConfigOperator</a>&nbsp;operator)</pre>
 <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span>
 <div class="deprecationComment">use <a href="#map(java.util.function.UnaryOperator)"><code>map(UnaryOperator)</code></a></div>
 </div>
 <div class="block">Extension point for adjusting configuration.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>operator</code> - A configuration operator, e.g. a filter, or an adjuster
                  combining configurations, never  <code>null</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the new adjusted configuration returned by the <code>operator</code>, never <code>null</code>.</dd>
 </dl>
 </li>
 </ul>
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 <pre class="methodSignature">default&nbsp;<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>&nbsp;map&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/UnaryOperator.html?is-external=true" title="class or interface in java.util.function" class="externalLink">UnaryOperator</a>&lt;<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>&gt;&nbsp;operator)</pre>
 <div class="block">Extension point for adjusting configuration.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>operator</code> - A configuration operator, e.g. a filter, or an adjuster
                  combining configurations, never  <code>null</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the new adjusted configuration returned by the <code>operator</code>, never <code>null</code>.</dd>
 </dl>
 </li>
 </ul>
 <a id="query(org.apache.tamaya.ConfigQuery)">
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 <h4>query</h4>
 <pre class="methodSignature"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink">@Deprecated</a>
 default&nbsp;&lt;T&gt;&nbsp;T&nbsp;query&#8203;(<a href="ConfigQuery.html" title="interface in org.apache.tamaya">ConfigQuery</a>&lt;T&gt;&nbsp;query)</pre>
 <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span>
 <div class="deprecationComment">Use <a href="#adapt(java.util.function.Function)"><code>adapt(Function)</code></a></div>
 </div>
 <div class="block">Query a configuration.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the configuration.</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>query</code> - the query, not <code>null</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the result returned by the <code>query</code>.</dd>
 </dl>
 </li>
 </ul>
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 <h4>adapt</h4>
 <pre class="methodSignature">default&nbsp;&lt;T&gt;&nbsp;T&nbsp;adapt&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function" class="externalLink">Function</a>&lt;<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>,&#8203;T&gt;&nbsp;query)</pre>
 <div class="block">Query a configuration.</div>
 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - the type of the configuration.</dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>query</code> - the query, not <code>null</code>.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the result returned by the <code>query</code>.</dd>
 </dl>
 </li>
 </ul>
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 <h4>getContext</h4>
 <pre class="methodSignature"><a href="spi/ConfigurationContext.html" title="interface in org.apache.tamaya.spi">ConfigurationContext</a>&nbsp;getContext()</pre>
 <div class="block">Access a configuration's context.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the configuration context, never null.</dd>
 </dl>
 </li>
 </ul>
 <a id="getSnapshot(java.lang.Iterable)">
 <!--   -->
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 <h4>getSnapshot</h4>
 <pre class="methodSignature"><a href="ConfigurationSnapshot.html" title="interface in org.apache.tamaya">ConfigurationSnapshot</a>&nbsp;getSnapshot&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&gt;&nbsp;keys)</pre>
 <div class="block">Create a snapshot, which contains the given keys.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keys</code> - the keys, not null. If empty a full snapshot with all known keys is returned.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a corresponding snapshot instance.</dd>
 </dl>
 </li>
 </ul>
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 <h4>getSnapshot</h4>
 <pre class="methodSignature">default&nbsp;<a href="ConfigurationSnapshot.html" title="interface in org.apache.tamaya">ConfigurationSnapshot</a>&nbsp;getSnapshot&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>...&nbsp;keys)</pre>
 <div class="block">Create a snapshot, which contains all known keys.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keys</code> - the target key. If empty a full snapshot with all known keys is returned.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a corresponding snapshot instance.</dd>
 </dl>
 </li>
 </ul>
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 <h4>toBuilder</h4>
 <pre class="methodSignature">default&nbsp;<a href="spi/ConfigurationBuilder.html" title="interface in org.apache.tamaya.spi">ConfigurationBuilder</a>&nbsp;toBuilder()</pre>
 <div class="block">Create a new builder using this instance as its base.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a new builder, never null.</dd>
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 <pre class="methodSignature">static&nbsp;void&nbsp;setCurrent&#8203;(<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>&nbsp;config)</pre>
 <div class="block">This method allows replacement of the current default <a href="Configuration.html" title="interface in org.apache.tamaya"><code>Configuration</code></a> with a new
  instance. It is the responsibility of the ConfigurationProvider to trigger
  corresponding update events for the current <a href="Configuration.html" title="interface in org.apache.tamaya"><code>Configuration</code></a>, so observing
  listeners can do whatever is appropriate to react to any given configuration change.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>config</code> - the new Configuration to be applied, not <code>null</code></dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang" class="externalLink">UnsupportedOperationException</a></code> - if the current provider is read-only and
                                                  does not support
                                                  applying a new Configuration.</dd>
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 <pre class="methodSignature">static&nbsp;void&nbsp;setCurrent&#8203;(<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>&nbsp;config,
                        <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang" class="externalLink">ClassLoader</a>&nbsp;classLoader)</pre>
 <div class="block">This method allows replacement of the current default <a href="Configuration.html" title="interface in org.apache.tamaya"><code>Configuration</code></a> with a new
  instance. It is the responsibility of the ConfigurationProvider to trigger
  corresponding update events for the current <a href="Configuration.html" title="interface in org.apache.tamaya"><code>Configuration</code></a>, so observing
  listeners can do whatever is appropriate to react to any given configuration change.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>config</code> - the new Configuration to be applied, not <code>null</code></dd>
 <dd><code>classLoader</code> - the target classloader, not null.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang" class="externalLink">UnsupportedOperationException</a></code> - if the current provider is read-only and
                                                  does not support
                                                  applying a new Configuration.</dd>
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 <pre class="methodSignature">static&nbsp;<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>&nbsp;current()</pre>
 <div class="block">Access the configuration instance for the current thread's context classloader.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the configuration instance, never null.</dd>
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 <pre class="methodSignature">static&nbsp;<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>&nbsp;current&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang" class="externalLink">ClassLoader</a>&nbsp;classloader)</pre>
 <div class="block">Accesses the configuration for a given classloader.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>classloader</code> - the classloader, not null.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the configuration instance, never null.</dd>
 </dl>
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 <h4>releaseConfiguration</h4>
 <pre class="methodSignature">static&nbsp;<a href="Configuration.html" title="interface in org.apache.tamaya">Configuration</a>&nbsp;releaseConfiguration&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang" class="externalLink">ClassLoader</a>&nbsp;classloader)</pre>
 <div class="block">Releases the configuration associated with the given classloader.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>classloader</code> - the classloader, not null.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the released configuration, or null.</dd>
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 <pre class="methodSignature">static&nbsp;<a href="spi/ConfigurationBuilder.html" title="interface in org.apache.tamaya.spi">ConfigurationBuilder</a>&nbsp;createConfigurationBuilder()</pre>
 <div class="block">Access a new configuration builder initialized with the current thread's context classloader.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the builder, never null.</dd>
 </dl>
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 </ul>
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