org.apache.sis.feature/org/apache/sis/feature/AbstractOperation.html - sis-site - Git at Google

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 <div class="sub-title"><span class="module-label-in-type">Module</span>&nbsp;<a href="../../../../module-summary.html">org.apache.sis.feature</a></div>
 <div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.sis.feature</a></div>
 <h1 title="Class AbstractOperation" class="title">Class AbstractOperation</h1>
 </div>
 <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>
 <div class="inheritance"><a href="AbstractIdentifiedType.html" title="class in org.apache.sis.feature">AbstractIdentifiedType</a>
 <div class="inheritance">AbstractOperation</div>
 </div>
 </div>
 <section class="class-description" id="class-description">
 <dl class="notes">
 <dt>All Implemented Interfaces:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/Serializable.html" title="class or interface in java.io" class="external-link">Serializable</a></code>, <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/function/BiFunction.html" title="class or interface in java.util.function" class="external-link">BiFunction</a>&lt;<a href="AbstractFeature.html" title="class in org.apache.sis.feature">AbstractFeature</a>,<wbr><a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/parameter/ParameterValueGroup.html" title="class or interface in org.opengis.parameter" class="external-link">ParameterValueGroup</a>,<wbr><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&gt;</code>, <code><a href="../../../../../org.apache.sis.util/org/apache/sis/util/Deprecable.html" title="interface in org.apache.sis.util">Deprecable</a></code></dd>
 </dl>
 <hr>
 <div class="type-signature"><span class="modifiers">public abstract class </span><span class="element-name type-name-label">AbstractOperation</span>
 <span class="extends-implements">extends <a href="AbstractIdentifiedType.html" title="class in org.apache.sis.feature">AbstractIdentifiedType</a>
 implements <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/function/BiFunction.html" title="class or interface in java.util.function" class="external-link">BiFunction</a>&lt;<a href="AbstractFeature.html" title="class in org.apache.sis.feature">AbstractFeature</a>,<wbr><a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/parameter/ParameterValueGroup.html" title="class or interface in org.opengis.parameter" class="external-link">ParameterValueGroup</a>,<wbr><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&gt;</span></div>
 <div class="block">Describes the behaviour of a feature type as a function or a method.
  Operations can:

  <ul>
    <li>Compute values from the attributes.</li>
    <li>Perform actions that change the attribute values.</li>
  </ul>

  <div class="note"><b>Example:</b> a mutator operation may raise the height of a dam. This changes
  may affect other properties like the watercourse and the reservoir associated with the dam.</div>

  The value is computed, or the operation is executed, by <code>apply(Feature, ParameterValueGroup)</code>.
  If the value is modifiable, new value can be set by call to <code>Attribute.setValue(Object)</code>.

  <div class="warning"><b>Warning:</b> this class is experimental and may change after we gained more
  experience on this aspect of ISO 19109.</div></div>
 <dl class="notes">
 <dt>Since:</dt>
 <dd>0.6</dd>
 <dt>See Also:</dt>
 <dd>
 <ul class="tag-list">
 <li><a href="DefaultFeatureType.html" title="class in org.apache.sis.feature"><code>DefaultFeatureType</code></a></li>
 <li><a href="../../../../../serialized-form.html#org.apache.sis.feature.AbstractOperation">Serialized Form</a></li>
 </ul>
 </dd>
 </dl>
 </section>
 <section class="summary">
 <ul class="summary-list">
 <!-- =========== FIELD SUMMARY =========== -->
 <li>
 <section class="field-summary" id="field-summary">
 <h2>Field Summary</h2>
 <div class="inherited-list">
 <h3 id="fields-inherited-from-class-AbstractIdentifiedType">Fields inherited from class&nbsp;<a href="AbstractIdentifiedType.html" title="class in org.apache.sis.feature">AbstractIdentifiedType</a></h3>
 <code><a href="AbstractIdentifiedType.html#DEFINITION_KEY">DEFINITION_KEY</a>, <a href="AbstractIdentifiedType.html#DEPRECATED_KEY">DEPRECATED_KEY</a>, <a href="AbstractIdentifiedType.html#DESCRIPTION_KEY">DESCRIPTION_KEY</a>, <a href="AbstractIdentifiedType.html#DESIGNATION_KEY">DESIGNATION_KEY</a>, <a href="AbstractIdentifiedType.html#NAME_KEY">NAME_KEY</a></code></div>
 </section>
 </li>
 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
 <li>
 <section class="constructor-summary" id="constructor-summary">
 <h2>Constructor Summary</h2>
 <div class="caption"><span>Constructors</span></div>
 <div class="summary-table two-column-summary">
 <div class="table-header col-first">Constructor</div>
 <div class="table-header col-last">Description</div>
 <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E(java.util.Map)" class="member-name-link">AbstractOperation</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Map.html" title="class or interface in java.util" class="external-link">Map</a>&lt;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>,<wbr>?&gt;&nbsp;identification)</code></div>
 <div class="col-last even-row-color">
 <div class="block">Constructs an operation from the given properties.</div>
 </div>
 </div>
 </section>
 </li>
 <!-- ========== 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-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-tab3" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab3', 3)" class="table-tab">Abstract 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">
 <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0">
 <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-tab2 method-summary-table-tab3"><code>abstract <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#apply(org.apache.sis.feature.AbstractFeature,org.opengis.parameter.ParameterValueGroup)" class="member-name-link">apply</a><wbr>(<a href="AbstractFeature.html" title="class in org.apache.sis.feature">AbstractFeature</a>&nbsp;feature,
  <a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/parameter/ParameterValueGroup.html" title="class or interface in org.opengis.parameter" class="external-link">ParameterValueGroup</a>&nbsp;parameters)</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">
 <div class="block">Executes the operation on the specified feature with the specified parameters.</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#equals(java.lang.Object)" class="member-name-link">equals</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&nbsp;obj)</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Compares this operation with the given object for equality.</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><wbr>&lt;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&gt;</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getDependencies()" class="member-name-link">getDependencies</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Returns the names of feature properties that this operation needs for performing its task.</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>abstract <a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/parameter/ParameterDescriptorGroup.html" title="class or interface in org.opengis.parameter" class="external-link">ParameterDescriptorGroup</a></code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getParameters()" class="member-name-link">getParameters</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">
 <div class="block">Returns a description of the input parameters.</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>abstract <a href="AbstractIdentifiedType.html" title="class in org.apache.sis.feature">AbstractIdentifiedType</a></code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getResult()" class="member-name-link">getResult</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">
 <div class="block">Returns the expected result type, or <code>null</code> if none.</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#hashCode()" class="member-name-link">hashCode</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 a hash code value for this operation.</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#toString()" class="member-name-link">toString</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Returns a string representation of this operation.</div>
 </div>
 </div>
 </div>
 </div>
 <div class="inherited-list">
 <h3 id="methods-inherited-from-class-AbstractIdentifiedType">Methods inherited from class&nbsp;<a href="AbstractIdentifiedType.html" title="class in org.apache.sis.feature">AbstractIdentifiedType</a></h3>
 <code><a href="AbstractIdentifiedType.html#getDefinition()">getDefinition</a>, <a href="AbstractIdentifiedType.html#getDescription()">getDescription</a>, <a href="AbstractIdentifiedType.html#getDesignation()">getDesignation</a>, <a href="AbstractIdentifiedType.html#getName()">getName</a>, <a href="AbstractIdentifiedType.html#getRemarks()">getRemarks</a>, <a href="AbstractIdentifiedType.html#isDeprecated()">isDeprecated</a></code></div>
 <div class="inherited-list">
 <h3 id="methods-inherited-from-class-Object">Methods inherited from class&nbsp;<a href="https://docs.oracle.com/en/java/javase/11/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/11/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/11/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/11/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/11/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/11/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/11/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/11/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/11/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>
 <div class="inherited-list">
 <h3 id="methods-inherited-from-class-BiFunction">Methods inherited from interface&nbsp;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/function/BiFunction.html" title="class or interface in java.util.function" class="external-link">BiFunction</a></h3>
 <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/function/BiFunction.html#andThen(java.util.function.Function)" title="class or interface in java.util.function" class="external-link">andThen</a></code></div>
 </section>
 </li>
 </ul>
 </section>
 <section class="details">
 <ul class="details-list">
 <!-- ========= CONSTRUCTOR DETAIL ======== -->
 <li>
 <section class="constructor-details" id="constructor-detail">
 <h2>Constructor Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="&lt;init&gt;(java.util.Map)">
 <h3>AbstractOperation</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">AbstractOperation</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Map.html" title="class or interface in java.util" class="external-link">Map</a>&lt;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>,<wbr>?&gt;&nbsp;identification)</span></div>
 <div class="block">Constructs an operation from the given properties. The identification map is given unchanged to
  the <a href="AbstractIdentifiedType.html#%3Cinit%3E(java.util.Map)">super-class constructor</a>.
  The following table is a reminder of main (not all) recognized map entries:

  <table class="sis">
    <caption>Recognized map entries (non exhaustive list)</caption>
    <tr>
      <th>Map key</th>
      <th>Value type</th>
      <th>Returned by</th>
    </tr>
    <tr>
      <td><a href="AbstractIdentifiedType.html#NAME_KEY">"name"</a></td>
      <td><a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/util/GenericName.html" title="class or interface in org.opengis.util" class="external-link"><code>GenericName</code></a> or <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link"><code>String</code></a></td>
      <td><a href="AbstractIdentifiedType.html#getName()"><code>AbstractIdentifiedType.getName()</code></a></td>
    </tr>
    <tr>
      <td><a href="AbstractIdentifiedType.html#DEFINITION_KEY">"definition"</a></td>
      <td><a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/util/InternationalString.html" title="class or interface in org.opengis.util" class="external-link"><code>InternationalString</code></a> or <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link"><code>String</code></a></td>
      <td><a href="AbstractIdentifiedType.html#getDefinition()"><code>AbstractIdentifiedType.getDefinition()</code></a></td>
    </tr>
    <tr>
      <td><a href="AbstractIdentifiedType.html#DESIGNATION_KEY">"designation"</a></td>
      <td><a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/util/InternationalString.html" title="class or interface in org.opengis.util" class="external-link"><code>InternationalString</code></a> or <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link"><code>String</code></a></td>
      <td><a href="AbstractIdentifiedType.html#getDesignation()"><code>AbstractIdentifiedType.getDesignation()</code></a></td>
    </tr>
    <tr>
      <td><a href="AbstractIdentifiedType.html#DESCRIPTION_KEY">"description"</a></td>
      <td><a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/util/InternationalString.html" title="class or interface in org.opengis.util" class="external-link"><code>InternationalString</code></a> or <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link"><code>String</code></a></td>
      <td><a href="AbstractIdentifiedType.html#getDescription()"><code>AbstractIdentifiedType.getDescription()</code></a></td>
    </tr>
    <tr>
      <td><a href="AbstractIdentifiedType.html#DEPRECATED_KEY">"deprecated"</a></td>
      <td><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Boolean.html" title="class or interface in java.lang" class="external-link"><code>Boolean</code></a></td>
      <td><a href="AbstractIdentifiedType.html#isDeprecated()"><code>AbstractIdentifiedType.isDeprecated()</code></a></td>
    </tr>
  </table></div>
 <dl class="notes">
 <dt>Parameters:</dt>
 <dd><code>identification</code> - the name and other information to be given to this operation.</dd>
 </dl>
 </section>
 </li>
 </ul>
 </section>
 </li>
 <!-- ============ METHOD DETAIL ========== -->
 <li>
 <section class="method-details" id="method-detail">
 <h2>Method Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="getParameters()">
 <h3>getParameters</h3>
 <div class="member-signature"><span class="modifiers">public abstract</span>&nbsp;<span class="return-type"><a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/parameter/ParameterDescriptorGroup.html" title="class or interface in org.opengis.parameter" class="external-link">ParameterDescriptorGroup</a></span>&nbsp;<span class="element-name">getParameters</span>()</div>
 <div class="block">Returns a description of the input parameters.</div>
 <dl class="notes">
 <dt>Returns:</dt>
 <dd>description of the input parameters.</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="getResult()">
 <h3>getResult</h3>
 <div class="member-signature"><span class="modifiers">public abstract</span>&nbsp;<span class="return-type"><a href="AbstractIdentifiedType.html" title="class in org.apache.sis.feature">AbstractIdentifiedType</a></span>&nbsp;<span class="element-name">getResult</span>()</div>
 <div class="block">Returns the expected result type, or <code>null</code> if none.

  <div class="warning"><b>Warning:</b> In a future SIS version, the return type may be changed
  to <code>org.opengis.feature.IdentifiedType</code>. This change is pending GeoAPI revision.</div></div>
 <dl class="notes">
 <dt>Returns:</dt>
 <dd>the type of the result, or <code>null</code> if none.</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="apply(org.apache.sis.feature.AbstractFeature,org.opengis.parameter.ParameterValueGroup)">
 <h3>apply</h3>
 <div class="member-signature"><span class="modifiers">public abstract</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></span>&nbsp;<span class="element-name">apply</span><wbr><span class="parameters">(<a href="AbstractFeature.html" title="class in org.apache.sis.feature">AbstractFeature</a>&nbsp;feature,
  <a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/parameter/ParameterValueGroup.html" title="class or interface in org.opengis.parameter" class="external-link">ParameterValueGroup</a>&nbsp;parameters)</span></div>
 <div class="block">Executes the operation on the specified feature with the specified parameters.
  The value returned by this method depends on the value returned by <a href="#getResult()"><code>getResult()</code></a>:

  <ul>
    <li>If <code>getResult()</code> returns <code>null</code>,
        then this method should return <code>null</code>.</li>
    <li>If <code>getResult()</code> returns an instance of <code>AttributeType</code>,
        then this method shall return an instance of <code>Attribute</code>
        and the <code>Attribute.getType() == getResult()</code> relation should hold.</li>
    <li>If <code>getResult()</code> returns an instance of <code>FeatureAssociationRole</code>,
        then this method shall return an instance of <code>FeatureAssociation</code>
        and the <code>FeatureAssociation.getRole() == getResult()</code> relation should hold.</li>
  </ul>

  <div class="note"><b>Analogy:</b>
  if we compare <code>Operation</code> to <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/reflect/Method.html" title="class or interface in java.lang.reflect" class="external-link"><code>Method</code></a> in the Java language, then this method is equivalent
  to <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/reflect/Method.html#invoke(java.lang.Object,java.lang.Object...)" title="class or interface in java.lang.reflect" class="external-link"><code>Method.invoke(Object, Object...)</code></a>. The <code>Feature</code> argument is equivalent to <code>this</code>
  in the Java language, and may be <code>null</code> if the operation does not need a feature instance
  (like static methods in the Java language).</div>

  <div class="warning"><b>Warning:</b> In a future SIS version, the parameter type and return value may
  be changed to <code>org.opengis.feature.Feature</code> and <code>org.opengis.feature.Property</code> respectively.
  This change is pending GeoAPI revision.</div></div>
 <dl class="notes">
 <dt>Specified by:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/function/BiFunction.html#apply(T,U)" title="class or interface in java.util.function" class="external-link">apply</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/function/BiFunction.html" title="class or interface in java.util.function" class="external-link">BiFunction</a>&lt;<a href="AbstractFeature.html" title="class in org.apache.sis.feature">AbstractFeature</a>,<wbr><a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/parameter/ParameterValueGroup.html" title="class or interface in org.opengis.parameter" class="external-link">ParameterValueGroup</a>,<wbr><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&gt;</code></dd>
 <dt>Parameters:</dt>
 <dd><code>feature</code> - the feature on which to execute the operation.
                      Can be <code>null</code> if the operation does not need feature instance.</dd>
 <dd><code>parameters</code> - the parameters to use for executing the operation.
                      Can be <code>null</code> if the operation does not take any parameters.</dd>
 <dt>Returns:</dt>
 <dd>the operation result, or <code>null</code> if this operation does not produce any result.</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="getDependencies()">
 <h3>getDependencies</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a>&lt;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&gt;</span>&nbsp;<span class="element-name">getDependencies</span>()</div>
 <div class="block">Returns the names of feature properties that this operation needs for performing its task.
  This method does not resolve transitive dependencies, i.e. if a dependency is itself an operation having
  other dependencies, the returned set will contain the name of that operation but not the names of that
  operation dependencies (unless they are the same that the direct dependencies of <code>this</code>).

  <div class="note"><b>Rational:</b>
  this information is needed for writing the <code>SELECT</code> SQL statement to send to a database server.
  The requested columns will typically be all attributes declared in a <code>FeatureType</code>, but also
  any additional columns needed for the operation while not necessarily included in the <code>FeatureType</code>.
  </div>

  The default implementation returns an empty set.</div>
 <dl class="notes">
 <dt>Returns:</dt>
 <dd>the names of feature properties needed by this operation for performing its task.</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="hashCode()">
 <h3>hashCode</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">hashCode</span>()</div>
 <div class="block">Returns a hash code value for this operation.
  The default implementation computes a hash code from the <a href="#getParameters()">parameters descriptor</a>
  and <a href="#getResult()">result type</a>.</div>
 <dl class="notes">
 <dt>Overrides:</dt>
 <dd><code><a href="AbstractIdentifiedType.html#hashCode()">hashCode</a></code>&nbsp;in class&nbsp;<code><a href="AbstractIdentifiedType.html" title="class in org.apache.sis.feature">AbstractIdentifiedType</a></code></dd>
 <dt>Returns:</dt>
 <dd>the hash code for this type.</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="equals(java.lang.Object)">
 <h3>equals</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">equals</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&nbsp;obj)</span></div>
 <div class="block">Compares this operation with the given object for equality.
  The default implementation compares the <a href="#getParameters()">parameters descriptor</a>
  and <a href="#getResult()">result type</a>.</div>
 <dl class="notes">
 <dt>Overrides:</dt>
 <dd><code><a href="AbstractIdentifiedType.html#equals(java.lang.Object)">equals</a></code>&nbsp;in class&nbsp;<code><a href="AbstractIdentifiedType.html" title="class in org.apache.sis.feature">AbstractIdentifiedType</a></code></dd>
 <dt>Parameters:</dt>
 <dd><code>obj</code> - the object to compare with this type.</dd>
 <dt>Returns:</dt>
 <dd><code>true</code> if the given object is equal to this type.</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="toString()">
 <h3>toString</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name">toString</span>()</div>
 <div class="block">Returns a string representation of this operation.
  The returned string is for debugging purpose and may change in any future SIS version.</div>
 <dl class="notes">
 <dt>Overrides:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></code></dd>
 <dt>Returns:</dt>
 <dd>a string representation of this operation for debugging purpose.</dd>
 </dl>
 </section>
 </li>
 </ul>
 </section>
 </li>
 </ul>
 </section>
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