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|  | <li><a href="#" tabindex="0">Description</a> | 
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|  | <li><a href="#other-system-wide-configuration-heading" tabindex="0">Other system-wide configuration</a></li> | 
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|  | <li><a href="#current()" tabindex="0">current()</a></li> | 
|  | <li><a href="#getDatabase()" tabindex="0">getDatabase()</a></li> | 
|  | <li><a href="#setDatabase(java.util.function.Supplier)" tabindex="0">setDatabase(Supplier)</a></li> | 
|  | <li><a href="#shutdown()" tabindex="0">shutdown()</a></li> | 
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|  | <!-- ======== START OF CLASS DATA ======== --> | 
|  | <div class="header"> | 
|  | <h1 title="Class Configuration" class="title">Class Configuration</h1> | 
|  | </div> | 
|  | <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a> | 
|  | <div class="inheritance">Configuration</div> | 
|  | </div> | 
|  | <section class="class-description" id="class-description"> | 
|  | <hr> | 
|  | <div class="horizontal-scroll"> | 
|  | <div class="type-signature"><span class="modifiers">public final class </span><span class="element-name type-name-label">Configuration</span> | 
|  | <span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></span></div> | 
|  | <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. | 
|  |  | 
|  | <h2 id="other-system-wide-configuration-heading">Other system-wide configuration</h2> | 
|  | The following methods have system-wide effects on Apache SIS configuration, | 
|  | but are not yet controlled through this <code>Configuration</code> class: | 
|  |  | 
|  | <ul> | 
|  | <li><a href="../util/logging/MonolineFormatter.html#install()"><code>MonolineFormatter.install()</code></a></li> | 
|  | <li><a href="../util/logging/PerformanceLevel.html#setMinDuration(long,java.util.concurrent.TimeUnit)"><code>PerformanceLevel.setMinDuration(long, TimeUnit)</code></a></li> | 
|  | </ul> | 
|  |  | 
|  | The following properties are defined by the standard Java environment. | 
|  | Apache SIS read those properties but does not modify them: | 
|  |  | 
|  | <ul> | 
|  | <li><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/Locale.html#getDefault()" title="class or interface in java.util" class="external-link"><code>Locale.getDefault()</code></a> (sometimes using <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/Locale.Category.html" title="class or interface in java.util" class="external-link"><code>Locale.Category</code></a>)</li> | 
|  | <li><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/nio/charset/Charset.html#defaultCharset()" title="class or interface in java.nio.charset" class="external-link"><code>Charset.defaultCharset()</code></a></li> | 
|  | <li><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/TimeZone.html#getDefault()" title="class or interface in java.util" class="external-link"><code>TimeZone.getDefault()</code></a></li> | 
|  | <li><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/System.html#lineSeparator()" title="class or interface in java.lang" class="external-link"><code>System.lineSeparator()</code></a></li> | 
|  | <li><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/io/File.html#pathSeparator" title="class or interface in java.io" class="external-link"><code>File.pathSeparator</code></a></li> | 
|  | <li><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/io/File.html#separator" title="class or interface in java.io" class="external-link"><code>File.separator</code></a></li> | 
|  | </ul></div> | 
|  | <dl class="notes"> | 
|  | <dt>Since:</dt> | 
|  | <dd>1.0</dd> | 
|  | </dl> | 
|  | </div> | 
|  | </section> | 
|  | <section class="summary"> | 
|  | <ul class="summary-list"> | 
|  | <!-- ========== METHOD SUMMARY =========== --> | 
|  | <li> | 
|  | <section class="method-summary" id="method-summary"> | 
|  | <h2>Method Summary</h2> | 
|  | <div id="method-summary-table"> | 
|  | <div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab1" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab1', 3)" class="table-tab">Static Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div> | 
|  | <div id="method-summary-table.tabpanel" role="tabpanel" aria-labelledby="method-summary-table-tab0"> | 
|  | <div class="summary-table three-column-summary"> | 
|  | <div class="table-header col-first">Modifier and Type</div> | 
|  | <div class="table-header col-second">Method</div> | 
|  | <div class="table-header col-last">Description</div> | 
|  | <div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static <a href="Configuration.html" title="class in org.apache.sis.setup">Configuration</a></code></div> | 
|  | <div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#current()" class="member-name-link">current</a>()</code></div> | 
|  | <div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> | 
|  | <div class="block">Returns the current configuration.</div> | 
|  | </div> | 
|  | <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/Optional.html" title="class or interface in java.util" class="external-link">Optional</a><wbr><<a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.sql/javax/sql/DataSource.html" title="class or interface in javax.sql" class="external-link">DataSource</a>></code></div> | 
|  | <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getDatabase()" class="member-name-link">getDatabase</a>()</code></div> | 
|  | <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> | 
|  | <div class="block">Returns the data source for the SIS-wide "SpatialMetadata" database.</div> | 
|  | </div> | 
|  | <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div> | 
|  | <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#setDatabase(java.util.function.Supplier)" class="member-name-link">setDatabase</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/function/Supplier.html" title="class or interface in java.util.function" class="external-link">Supplier</a><<a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.sql/javax/sql/DataSource.html" title="class or interface in javax.sql" class="external-link">DataSource</a>> source)</code></div> | 
|  | <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> | 
|  | <div class="block">Specifies the data source to use if no <code>"jdbc/SpatialMetadata"</code> source is binded to a JNDI environment.</div> | 
|  | </div> | 
|  | <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div> | 
|  | <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#shutdown()" class="member-name-link">shutdown</a>()</code></div> | 
|  | <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> | 
|  | <div class="block">Shutdowns the Apache <abbr>SIS</abbr> library.</div> | 
|  | </div> | 
|  | </div> | 
|  | </div> | 
|  | </div> | 
|  | <div class="inherited-list"> | 
|  | <h3 id="methods-inherited-from-class-Object">Methods inherited from class <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3> | 
|  | <code><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div> | 
|  | </section> | 
|  | </li> | 
|  | </ul> | 
|  | </section> | 
|  | <section class="details"> | 
|  | <ul class="details-list"> | 
|  | <!-- ============ METHOD DETAIL ========== --> | 
|  | <li> | 
|  | <section class="method-details" id="method-detail"> | 
|  | <h2>Method Details</h2> | 
|  | <ul class="member-list"> | 
|  | <li> | 
|  | <section class="detail" id="current()"> | 
|  | <h3>current</h3> | 
|  | <div class="horizontal-scroll"> | 
|  | <div class="member-signature"><span class="modifiers">public static</span> <span class="return-type"><a href="Configuration.html" title="class in org.apache.sis.setup">Configuration</a></span> <span class="element-name">current</span>()</div> | 
|  | <div class="block">Returns the current configuration.</div> | 
|  | <dl class="notes"> | 
|  | <dt>Returns:</dt> | 
|  | <dd>the current configuration.</dd> | 
|  | </dl> | 
|  | </div> | 
|  | </section> | 
|  | </li> | 
|  | <li> | 
|  | <section class="detail" id="getDatabase()"> | 
|  | <h3>getDatabase</h3> | 
|  | <div class="horizontal-scroll"> | 
|  | <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/Optional.html" title="class or interface in java.util" class="external-link">Optional</a><<a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.sql/javax/sql/DataSource.html" title="class or interface in javax.sql" class="external-link">DataSource</a>></span> <span class="element-name">getDatabase</span>() | 
|  | throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.sql/java/sql/SQLException.html" title="class or interface in java.sql" class="external-link">SQLException</a></span></div> | 
|  | <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>org.apache.sis.referencing.database</code> module is present on the module path, | 
|  | use the embedded database.</li> | 
|  | <li>Otherwise if the "<code><span id="derby.system.home" class="search-tag-result">derby.system.home</span></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 class="notes"> | 
|  | <dt>Returns:</dt> | 
|  | <dd>the data source for the <code>"SpatialMetadata"</code> database.</dd> | 
|  | <dt>Throws:</dt> | 
|  | <dd><code><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.sql/java/sql/SQLException.html" title="class or interface in java.sql" class="external-link">SQLException</a></code> - if an error occurred while fetching the database source.</dd> | 
|  | </dl> | 
|  | </div> | 
|  | </section> | 
|  | </li> | 
|  | <li> | 
|  | <section class="detail" id="setDatabase(java.util.function.Supplier)"> | 
|  | <h3>setDatabase</h3> | 
|  | <div class="horizontal-scroll"> | 
|  | <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">setDatabase</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/function/Supplier.html" title="class or interface in java.util.function" class="external-link">Supplier</a><<a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.sql/javax/sql/DataSource.html" title="class or interface in javax.sql" class="external-link">DataSource</a>> source)</span></div> | 
|  | <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. The following example shows how to setup a connection to a PostgreSQL database: | 
|  |  | 
|  |  | 
|  | <div class="snippet-container"><button class="copy snippet-copy" aria-label="Copy snippet" onclick="copySnippet(this)"><span data-copied="Copied!">Copy</span><img src="../../../../../resource-files/copy.svg" alt="Copy snippet"></button> | 
|  | <pre class="snippet" id="snippet-setDatabase(java.util.function.Supplier)1"><code class="language-java">import org.postgresql.ds.PGSimpleDataSource; | 
|  |  | 
|  | class MyClass { | 
|  | private static DataSource createDataSource() { | 
|  | PGSimpleDataSource ds = new PGSimpleDataSource(); | 
|  | ds.setDatabaseName("SpatialMetadata"); | 
|  | // Server default to "localhost". | 
|  | return ds; | 
|  | } | 
|  |  | 
|  | static initialize() { | 
|  | if (WANT_TO_CONFIGURE_JNDI) { | 
|  | // Registration assuming that a JNDI implementation is available | 
|  | Context env = (Context) InitialContext.doLookup("java:comp/env"); | 
|  | env.bind("jdbc/SpatialMetadata", createDataSource()); | 
|  | } | 
|  |  | 
|  | // Fallback if there is no JNDI or no "SpatialMetadata" entry. | 
|  | Configuration.current().setDatabase(MyClass::createDataSource); | 
|  | } | 
|  | } | 
|  | </code></pre> | 
|  | </div> | 
|  |  | 
|  |  | 
|  | 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/en/java/javase/25/docs/api/java.sql/javax/sql/DataSource.html" title="class or interface in javax.sql" class="external-link"><code>DataSource</code></a> has already be obtained, then this method throws <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/IllegalStateException.html" title="class or interface in java.lang" class="external-link"><code>IllegalStateException</code></a>.</div> | 
|  | <dl class="notes"> | 
|  | <dt>Parameters:</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>Throws:</dt> | 
|  | <dd><code><a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/IllegalStateException.html" title="class or interface in java.lang" class="external-link">IllegalStateException</a></code> - if <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.sql/javax/sql/DataSource.html" title="class or interface in javax.sql" class="external-link"><code>DataSource</code></a> has already be obtained before this method call.</dd> | 
|  | <dt>See Also:</dt> | 
|  | <dd> | 
|  | <ul class="tag-list-long"> | 
|  | <li><a href="https://sis.apache.org/epsg.html#jndi">How to use EPSG geodetic dataset</a></li> | 
|  | </ul> | 
|  | </dd> | 
|  | </dl> | 
|  | </div> | 
|  | </section> | 
|  | </li> | 
|  | <li> | 
|  | <section class="detail" id="shutdown()"> | 
|  | <h3>shutdown</h3> | 
|  | <div class="horizontal-scroll"> | 
|  | <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">shutdown</span>()</div> | 
|  | <div class="block">Shutdowns the Apache <abbr>SIS</abbr> library. | 
|  | This method closes database connections and stops the daemon threads that were started by <abbr>SIS</abbr>. | 
|  | <strong>The Apache <abbr>SIS</abbr> library shall not be used anymore after this method call.</strong> | 
|  | Any use of Apache <abbr>SIS</abbr> after this method call may have unexpected effects. | 
|  | In particular, it may cause memory leaks. | 
|  |  | 
|  | <h4 id="when-to-use-heading">When to use</h4> | 
|  | This method should generally <strong>not</strong> be invoked, because Apache <abbr>SIS</abbr> registers | 
|  | itself a <a href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/Runtime.html#addShutdownHook(java.lang.Thread)" title="class or interface in java.lang" class="external-link">shutdown hook</a> to the Java Virtual Machine. | 
|  | This method may be useful in embedded environments that do not allow the use of shutdown hooks, | 
|  | or when waiting for the <abbr>JVM</abbr> shutdown is overly conservative. | 
|  |  | 
|  | <h4 id="complete-shutdown-heading">Complete shutdown</h4> | 
|  | This method shutdowns only the databases used by Apache <abbr>SIS</abbr>. | 
|  | If Apache Derby is used for the <abbr>EPSG</abbr> database, some Derby daemon threads may still be running. | 
|  | Those daemons can be ignored in standalone applications, but may need to be stopped in embedded environments. | 
|  | A complete Derby shutdown can be requested with the following code: | 
|  |  | 
|  |  | 
|  | <div class="snippet-container"><button class="copy snippet-copy" aria-label="Copy snippet" onclick="copySnippet(this)"><span data-copied="Copied!">Copy</span><img src="../../../../../resource-files/copy.svg" alt="Copy snippet"></button> | 
|  | <pre class="snippet" id="snippet-shutdown()1"><code class="language-java">Configuration.current().shutdown(); | 
|  | try { | 
|  | DriverManager.getConnection("jdbc:derby:;shutdown=true"); | 
|  | } catch (SQLException e) { | 
|  | // Expected exception as per Derby documentation. | 
|  | } | 
|  | </code></pre> | 
|  | </div> | 
|  | </div> | 
|  | <dl class="notes"> | 
|  | <dt>Since:</dt> | 
|  | <dd>1.5</dd> | 
|  | <dt>See Also:</dt> | 
|  | <dd> | 
|  | <ul class="tag-list"> | 
|  | <li><a href="https://db.apache.org/derby/docs/10.15/devguide/tdevdvlp40464.html">Shutting down Derby</a></li> | 
|  | </ul> | 
|  | </dd> | 
|  | </dl> | 
|  | </div> | 
|  | </section> | 
|  | </li> | 
|  | </ul> | 
|  | </section> | 
|  | </li> | 
|  | </ul> | 
|  | </section> | 
|  | <!-- ========= END OF CLASS DATA ========= --> | 
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|  | </div> | 
|  | </body> | 
|  | </html> |