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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.sis.setup</a></div>
<h2 title="Class Configuration" class="title">Class Configuration</h2>
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<pre>public final class <span class="typeNameLabel">Configuration</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></pre>
<div class="block">Provides system-wide configuration for Apache SIS library.
Methods in this class can be used for overriding SIS default values.
Those methods can be used in final applications, but should not be used by libraries
in order to avoid interfering with user's settings.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.0</dd>
<p><font size="-1">Defined in the <code>sis-utility</code> module</font></p>
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<td class="colFirst"><code>static <a href="Configuration.html" title="class in org.apache.sis.setup">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">Returns the current configuration.</div>
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<td class="colFirst"><code><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/javax/sql/DataSource.html?is-external=true" title="class or interface in javax.sql" class="externalLink">DataSource</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getDatabase()">getDatabase</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the data source for the SIS-wide "SpatialMetadata" database.</div>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setDatabase(java.util.function.Supplier)">setDatabase</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Supplier.html?is-external=true" title="class or interface in java.util.function" class="externalLink">Supplier</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/javax/sql/DataSource.html?is-external=true" title="class or interface in javax.sql" class="externalLink">DataSource</a>&gt;&nbsp;source)</code></th>
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<div class="block">Specifies the data source to use if no <code>"jdbc/Spatial­Metadata"</code> source is binded to a JNDI environment.</div>
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<h4>current</h4>
<pre class="methodSignature">public static&nbsp;<a href="Configuration.html" title="class in org.apache.sis.setup">Configuration</a>&nbsp;current()</pre>
<div class="block">Returns the current configuration.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the current configuration.</dd>
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<h4>getDatabase</h4>
<pre class="methodSignature">public&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/javax/sql/DataSource.html?is-external=true" title="class or interface in javax.sql" class="externalLink">DataSource</a>&gt;&nbsp;getDatabase()
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/sql/SQLException.html?is-external=true" title="class or interface in java.sql" class="externalLink">SQLException</a></pre>
<div class="block">Returns the data source for the SIS-wide "SpatialMetadata" database.
This method returns the first of the following steps that succeed:
<ol>
<li>If a JNDI context exists, use the data source registered under the <code>"jdbc/Spatial­Metadata"</code> name.</li>
<li>Otherwise if a default data source <a href="#setDatabase(java.util.function.Supplier)">has been supplied</a>, use that data source.</li>
<li>Otherwise if the <code>SIS_DATA</code> environment variable is defined,
use the data source for <code>"jdbc:derby:$SIS_DATA/Databases/Spatial­Metadata"</code>.
That database will be created if it does not exist. Note that this is the only case where
Apache SIS may create the database since it is located in the directory managed by Apache SIS.</li>
<li>Otherwise if the <code>non-free:sis-embedded-data</code> module is present on the classpath,
use the embedded database.</li>
<li>Otherwise if the <code>"derby​.system​.home"</code> property is defined,
use the data source for <code>"jdbc:derby:Spatial­Metadata"</code> database.
This database will <strong>not</strong> be created if it does not exist.</li>
</ol></div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the data source for the <code>"Spatial­Metadata"</code> database.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/sql/SQLException.html?is-external=true" title="class or interface in java.sql" class="externalLink">SQLException</a></code> - if an error occurred while fetching the database source.</dd>
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<h4>setDatabase</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;setDatabase&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Supplier.html?is-external=true" title="class or interface in java.util.function" class="externalLink">Supplier</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/javax/sql/DataSource.html?is-external=true" title="class or interface in javax.sql" class="externalLink">DataSource</a>&gt;&nbsp;source)</pre>
<div class="block">Specifies the data source to use if no <code>"jdbc/Spatial­Metadata"</code> source is binded to a JNDI environment.
Data source specified by JNDI has precedence over data source specified by this method in order to let users
control their data source.
<p>This method can be invoked only before the first attempt to <a href="#getDatabase()">get the database</a>.
If the <a href="https://docs.oracle.com/javase/8/docs/api/javax/sql/DataSource.html?is-external=true" title="class or interface in javax.sql" class="externalLink"><code>Data­Source</code></a> has already be obtained, then this method throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang" class="externalLink"><code>Illegal­State­Exception</code></a>.</p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>source</code> - supplier of data source to set.
The supplier may return <code>null</code>, in which case it will be ignored.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang" class="externalLink">Illegal­State­Exception</a></code> - if <a href="https://docs.oracle.com/javase/8/docs/api/javax/sql/DataSource.html?is-external=true" title="class or interface in javax.sql" class="externalLink"><code>Data­Source</code></a> has already be obtained before this method call.</dd>
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