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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.tamaya.spi</a></div>
<h2 title="Interface PropertySourceProvider" class="title">Interface PropertySourceProvider</h2>
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<dt>All Known Implementing Classes:</dt>
<dd><code><a href="../spisupport/propertysource/BuildablePropertySourceProvider.html" title="class in org.apache.tamaya.spisupport.propertysource">BuildablePropertySourceProvider</a></code>, <code><a href="../examples/custompropertysource/SimplePropertySourceProvider.html" title="class in org.apache.tamaya.examples.custompropertysource">SimplePropertySourceProvider</a></code></dd>
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<dt>Functional Interface:</dt>
<dd>This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.</dd>
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<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/FunctionalInterface.html?is-external=true" title="class or interface in java.lang" class="externalLink">@FunctionalInterface</a>
public interface <span class="typeNameLabel">PropertySourceProvider</span></pre>
<div class="block"><p>Implement this interfaces to provide a PropertySource provider which
is able to register multiple PropertySources. This is e.g. needed if
there are multiple property files of a given config file name.</p>
<p>If a PropertySource like JNDI only exists once, then there is no need
to implement it via the PropertySourceProvider but should directly
expose a <a href="PropertySource.html" title="interface in org.apache.tamaya.spi"><code>PropertySource</code></a>.</p>
<p>A PropertySourceProvider will current picked up via the
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/ServiceLoader.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>ServiceLoader</code></a> mechanism and must current registered via
META-INF/services/org.apache.tamaya.spi.PropertySourceProvider</p></div>
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<td class="colFirst"><code>static <a href="PropertySourceProvider.html" title="interface in org.apache.tamaya.spi">PropertySourceProvider</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#EMPTY">EMPTY</a></span></code></th>
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<div class="block">A resusable instance of an empty PropertySource.</div>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util" class="externalLink">Collection</a>&lt;<a href="PropertySource.html" title="interface in org.apache.tamaya.spi">PropertySource</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getPropertySources()">getPropertySources</a></span>()</code></th>
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<pre>static final&nbsp;<a href="PropertySourceProvider.html" title="interface in org.apache.tamaya.spi">PropertySourceProvider</a> EMPTY</pre>
<div class="block">A resusable instance of an empty PropertySource.</div>
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<pre class="methodSignature"><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util" class="externalLink">Collection</a>&lt;<a href="PropertySource.html" title="interface in org.apache.tamaya.spi">PropertySource</a>&gt;&nbsp;getPropertySources()</pre>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>For each e.g. property file, we return a single PropertySource
or an empty createList if no PropertySource exists.</dd>
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