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| <li>Summary: </li> |
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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.tamaya.spi</a></div> |
| <h2 title="Interface PropertySource" class="title">Interface PropertySource</h2> |
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| <dl> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><code><a href="../core/propertysource/BasePropertySource.html" title="class in org.apache.tamaya.core.propertysource">BasePropertySource</a></code>, <code><a href="../spisupport/propertysource/BasePropertySource.html" title="class in org.apache.tamaya.spisupport.propertysource">BasePropertySource</a></code>, <code><a href="../spisupport/propertysource/BuildablePropertySource.html" title="class in org.apache.tamaya.spisupport.propertysource">BuildablePropertySource</a></code>, <code><a href="../spisupport/propertysource/CLIPropertySource.html" title="class in org.apache.tamaya.spisupport.propertysource">CLIPropertySource</a></code>, <code><a href="../spisupport/DefaultPropertySourceSnapshot.html" title="class in org.apache.tamaya.spisupport">DefaultPropertySourceSnapshot</a></code>, <code><a href="../spisupport/propertysource/EnvironmentPropertySource.html" title="class in org.apache.tamaya.spisupport.propertysource">EnvironmentPropertySource</a></code>, <code><a href="../spisupport/propertysource/JavaConfigurationPropertySource.html" title="class in org.apache.tamaya.spisupport.propertysource">JavaConfigurationPropertySource</a></code>, <code><a href="../spisupport/propertysource/MapPropertySource.html" title="class in org.apache.tamaya.spisupport.propertysource">MapPropertySource</a></code>, <code><a href="../spisupport/propertysource/PropertiesResourcePropertySource.html" title="class in org.apache.tamaya.spisupport.propertysource">PropertiesResourcePropertySource</a></code>, <code><a href="../examples/custompropertysource/SimplePropertySource.html" title="class in org.apache.tamaya.examples.custompropertysource">SimplePropertySource</a></code>, <code><a href="../spisupport/propertysource/SimplePropertySource.html" title="class in org.apache.tamaya.spisupport.propertysource">SimplePropertySource</a></code>, <code><a href="../spisupport/propertysource/SystemPropertySource.html" title="class in org.apache.tamaya.spisupport.propertysource">SystemPropertySource</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public interface <span class="typeNameLabel">PropertySource</span></pre> |
| <div class="block"><p>This interface models a provider that serves configuration properties. The contained |
| properties may be read from a Map of single or several sources (composite). |
| PropertySources are the building blocks of the final configuration. </p> |
| <h3>Implementation Requirements</h3> |
| <p>Implementations of this interface must be</p> |
| <ul> |
| <li>Thread safe.</li> |
| </ul> |
| |
| <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 can be registered via |
| <code>META-INF/services/org.apache.tamaya.spi.PropertySource</code> |
| </p> |
| <p> |
| If you like to register multiple PropertySources at the same time |
| you can use the <a href="PropertySourceProvider.html" title="interface in org.apache.tamaya.spi"><code>PropertySourceProvider</code></a> |
| interface. |
| </p></div> |
| </li> |
| </ul> |
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| </a> |
| <h3>Field Summary</h3> |
| <table class="memberSummary"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Field</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="PropertySource.html" title="interface in org.apache.tamaya.spi">PropertySource</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">A resusable instance of an empty PropertySource.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <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="#TAMAYA_ORDINAL">TAMAYA_ORDINAL</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">property name to override default tamaya ordinals</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
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| <h3>Method Summary</h3> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>default void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addChangeListener(java.util.function.BiConsumer)">addChangeListener</a></span>​(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/BiConsumer.html?is-external=true" title="class or interface in java.util.function" class="externalLink">BiConsumer</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<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>>,​<a href="PropertySource.html" title="interface in org.apache.tamaya.spi">PropertySource</a>> l)</code></th> |
| <td class="colLast"> |
| <div class="block">Add a change listener for this properrty source.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="PropertyValue.html" title="class in org.apache.tamaya.spi">PropertyValue</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get(java.lang.String)">get</a></span>​(<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> key)</code></th> |
| <td class="colLast"> |
| <div class="block">Access a property.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>default <a href="ChangeSupport.html" title="enum in org.apache.tamaya.spi">ChangeSupport</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getChangeSupport()">getChangeSupport</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Get the support for reporting changes to property sources provided by this instance.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><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="#getName()">getName</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Get the name of the property source.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>default int</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOrdinal()">getOrdinal</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">The ordinal value is the default ordering parameter which definines the default order of |
| auto-discovered property sources.</div> |
| </td> |
| </tr> |
| <tr id="i5" 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><<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>,​<a href="PropertyValue.html" title="class in org.apache.tamaya.spi">PropertyValue</a>></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 the current properties as Set.</div> |
| </td> |
| </tr> |
| <tr id="i6" 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="#getVersion()">getVersion</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Get the current version.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>default boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isScannable()">isScannable</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> |
| <div class="deprecationComment">will be removed.</div> |
| </div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>default void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeAllChangeListeners()">removeAllChangeListeners</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Removes all registered change listeners, if any.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>default void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeChangeListener(java.util.function.BiConsumer)">removeChangeListener</a></span>​(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/BiConsumer.html?is-external=true" title="class or interface in java.util.function" class="externalLink">BiConsumer</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<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>>,​<a href="PropertySource.html" title="interface in org.apache.tamaya.spi">PropertySource</a>> l)</code></th> |
| <td class="colLast"> |
| <div class="block">Removes a change listener for this properrty source.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="field.detail"> |
| <!-- --> |
| </a> |
| <h3>Field Detail</h3> |
| <a id="TAMAYA_ORDINAL"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>TAMAYA_ORDINAL</h4> |
| <pre>static final <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> TAMAYA_ORDINAL</pre> |
| <div class="block">property name to override default tamaya ordinals</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.tamaya.spi.PropertySource.TAMAYA_ORDINAL">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="EMPTY"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>EMPTY</h4> |
| <pre>static final <a href="PropertySource.html" title="interface in org.apache.tamaya.spi">PropertySource</a> EMPTY</pre> |
| <div class="block">A resusable instance of an empty PropertySource.</div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| <!-- ============ METHOD DETAIL ========== --> |
| <section role="region"> |
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| <li class="blockList"><a id="method.detail"> |
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| <h3>Method Detail</h3> |
| <a id="getOrdinal()"> |
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| </a> |
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| <h4>getOrdinal</h4> |
| <pre class="methodSignature">default int getOrdinal()</pre> |
| <div class="block">The ordinal value is the default ordering parameter which definines the default order of |
| auto-discovered property sources. Ordering of property sources is important since values |
| from property sources with higher ordinal values override values from less significant |
| property sources. |
| |
| By default Tamaya includes the following property sources: |
| <ol> |
| <li>Properties file values (/META-INF/javaconfiguration.properties) (ordinal 100)</li> |
| <li>JNDI values (ordinal 200, only when adding the <code>tamaya-jndi</code> extension module)</li> |
| <li>Environment properties (ordinal 300)</li> |
| <li>System properties (ordinal 1000)</li> |
| </ol> |
| |
| <p><b>Important Hints for custom implementations</b>:</p> |
| <p> |
| If a custom implementation should be invoked <b>before</b> the default implementations, use a value > 1000 |
| </p> |
| <p> |
| If a custom implementation should be invoked <b>after</b> the default implementations, use a value < 100 |
| </p> |
| |
| <p>Reordering of the default order of the config-sources:</p> |
| <p>Example: If the properties file/s should be used <b>before</b> the other implementations, |
| you have to configure an ordinal > 1000. That means, you have to addPropertyValue e.g. tamaya.ordinal=401 to |
| /META-INF/javaconfiguration.properties . Hint: In case of property files every file is handled as independent |
| config-source, but all of them have ordinal 400 by default (and can be reordered in a fine-grained manner.</p> |
| |
| In cases where it is not possible to change a config sources ordinal value, you may have several options: |
| <ul> |
| <li>you can use a <a href="ConfigurationBuilder.html" title="interface in org.apache.tamaya.spi"><code>ConfigurationBuilder</code></a> to redefine the source order and finally use |
| <a href="../ConfigurationProvider.html#setConfiguration(org.apache.tamaya.Configuration)"><code>ConfigurationProvider.setConfiguration(Configuration)</code></a> to |
| change the current default <a href="../Configuration.html" title="interface in org.apache.tamaya"><code>Configuration</code></a>.</li> |
| <li>finally, the implementor of this API may define alternate mechanism to reconfigure an ordinal |
| in a vendor specific way.</li> |
| </ul></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the 'importance' aka ordinal of the configured values. The higher, the more important.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getName()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getName</h4> |
| <pre class="methodSignature"><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> getName()</pre> |
| <div class="block">Get the name of the property source. The name should be unique for the type of source, whereas the id is used |
| to ensure unique identity, either locally or remotely.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the configuration's name, never <code>null</code>.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="get(java.lang.String)"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>get</h4> |
| <pre class="methodSignature"><a href="PropertyValue.html" title="class in org.apache.tamaya.spi">PropertyValue</a> get​(<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> 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 value mapProperties, where <code>mapProperties.current(key) == value</code>, including also any metadata. In case a |
| value is null, simply return <code>null</code>.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getProperties()"> |
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| </a> |
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| <li class="blockList"> |
| <h4>getProperties</h4> |
| <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><<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>,​<a href="PropertyValue.html" title="class in org.apache.tamaya.spi">PropertyValue</a>> getProperties()</pre> |
| <div class="block">Access the current properties as Set. The resulting Map may not return all items accessible, e.g. |
| when the underlying storage does not support iteration of its entries. |
| <code>null</code></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the corresponding mapProperties, never null.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="isScannable()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isScannable</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 boolean isScannable()</pre> |
| <div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span> |
| <div class="deprecationComment">will be removed.</div> |
| </div> |
| <div class="block">Determines if this config source can be scanned for its createList of properties. |
| |
| <p> |
| PropertySources which are not scannable might not be able to find all the |
| configured values to provide via <a href="#getProperties()"><code>getProperties()</code></a>. This might happen |
| if the underlying storage doesn't support listing. |
| </p></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>true</code> if this PropertySource can be scanned for its createList of properties, |
| <code>false</code> if it cannot/should not be scanned.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getChangeSupport()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getChangeSupport</h4> |
| <pre class="methodSignature">default <a href="ChangeSupport.html" title="enum in org.apache.tamaya.spi">ChangeSupport</a> getChangeSupport()</pre> |
| <div class="block">Get the support for reporting changes to property sources provided by this instance. This support |
| type should never change during a property source's lifetime.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the change support of this property source, not null.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getVersion()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getVersion</h4> |
| <pre class="methodSignature">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> getVersion()</pre> |
| <div class="block">Get the current version. A new version signals that it is known that properties have changed for this property |
| source. This is especially useful, when <a href="#getChangeSupport()"><code>getChangeSupport()</code></a> is <a href="ChangeSupport.html#SUPPORTED"><code>ChangeSupport.SUPPORTED</code></a>. |
| The content and format of the version String is imeplemtation specific. We recommend to addPropertyValue information |
| such as the loading timestamp, the source systems read or whatever is appropriate. By default this |
| method returns <code>"N/A"</code>.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the version this property source, never null.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="addChangeListener(java.util.function.BiConsumer)"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>addChangeListener</h4> |
| <pre class="methodSignature">default void addChangeListener​(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/BiConsumer.html?is-external=true" title="class or interface in java.util.function" class="externalLink">BiConsumer</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<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>>,​<a href="PropertySource.html" title="interface in org.apache.tamaya.spi">PropertySource</a>> l)</pre> |
| <div class="block">Add a change listener for this properrty source.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>l</code> - the listner, not null.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="removeChangeListener(java.util.function.BiConsumer)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>removeChangeListener</h4> |
| <pre class="methodSignature">default void removeChangeListener​(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/BiConsumer.html?is-external=true" title="class or interface in java.util.function" class="externalLink">BiConsumer</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a><<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>>,​<a href="PropertySource.html" title="interface in org.apache.tamaya.spi">PropertySource</a>> l)</pre> |
| <div class="block">Removes a change listener for this properrty source.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>l</code> - the listner, not null.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="removeAllChangeListeners()"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>removeAllChangeListeners</h4> |
| <pre class="methodSignature">default void removeAllChangeListeners()</pre> |
| <div class="block">Removes all registered change listeners, if any.</div> |
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