static/apidocs/org/apache/sis/feature/DefaultAttributeType.html - sis-site - Git at Google

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 <div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.sis.feature</a></div>
 <h2 title="Class DefaultAttributeType" class="title">Class DefaultAttributeType&lt;V&gt;</h2>
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 <dd><code>V</code> - the type of attribute values.</dd>
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 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io" class="externalLink">Serializable</a></code>, <code><a href="../util/Deprecable.html" title="interface in org.apache.sis.util">Deprecable</a></code></dd>
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 <pre>public class <span class="typeNameLabel">DefaultAttributeType&lt;V&gt;</span>
 extends <a href="AbstractIdentifiedType.html" title="class in org.apache.sis.feature">AbstractIdentifiedType</a></pre>
 <div class="block">Definition of an attribute in a feature type.
  The name of attribute type is mandatory. The name <a href="../util/iso/AbstractName.html#scope()">scope</a>
  is typically the name of the <a href="DefaultFeatureType.html" title="class in org.apache.sis.feature">feature type</a> containing this attribute, but this is
  not mandatory. The scope could also be defined by the ontology for example.

  <div class="note"><b>Note:</b>
  Compared to the Java language, <code>AttributeType</code> is equivalent to <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink"><code>Field</code></a>
  while <code>FeatureType</code> is equivalent to <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink"><code>Class</code></a>.
  Attribute characterization (discussed below) is similar to <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/Annotation.html?is-external=true" title="class or interface in java.lang.annotation" class="externalLink"><code>Annotation</code></a>.
  </div>

  <div class="warning"><b>Warning:</b>
  This class is expected to implement a GeoAPI <code>AttributeType</code> interface in a future version.
  When such interface will be available, most references to <code>DefaultAttributeType</code> in current
  API will be replaced by references to the <code>AttributeType</code> interface.</div>

  <div class="section">Value type</div>
  Attributes can be used for both spatial and non-spatial properties.
  Some examples are:

  <table class="sis">
    <caption>Attribute value type examples</caption>
    <tr><th>Attribute name</th>      <th>Value type</th></tr>
    <tr><td>Building shape</td>      <td><a href="http://www.geoapi.org/3.0/javadoc/org/opengis/geometry/Geometry.html?is-external=true" title="class or interface in org.opengis.geometry" class="externalLink"><code>Geometry</code></a></td></tr>
    <tr><td>Building owner</td>      <td><a href="http://www.geoapi.org/3.0/javadoc/org/opengis/metadata/citation/ResponsibleParty.html?is-external=true" title="class or interface in org.opengis.metadata.citation" class="externalLink"><code>ResponsibleParty</code></a></td></tr>
    <tr><td>Horizontal accuracy</td> <td><a href="http://www.geoapi.org/3.0/javadoc/org/opengis/metadata/quality/PositionalAccuracy.html?is-external=true" title="class or interface in org.opengis.metadata.quality" class="externalLink"><code>PositionalAccuracy</code></a></td></tr>
  </table>

  <div class="section">Attribute characterization</div>
  An <code>Attribute</code> can be characterized by other attributes. For example an attribute that carries a measurement
  (e.g. air temperature) may have another attribute that holds the measurement accuracy (e.g. ±0.1°C).
  The accuracy value is often constant for all instances of that attribute
  (e.g. for all temperature measurements in the same dataset), but this is not mandatory.

  <div class="note"><b>Design note:</b>
  Such accuracy could be stored as an ordinary, independent, attribute (like an other column in a table),
  but storing accuracy as a <a href="#characteristics()">characteristic</a> of the measurement attribute instead
  provides the following advantages:

  <ul>
    <li>The same characteristic name (e.g. “accuracy”) can be used for different attributes
        (e.g. “temperature”, “humidity”, <i>etc.</i>) since all characteristics are local to their attribute.</li>
    <li>A reference to an attribute gives also access to its characteristics. For example any method expecting
        an <code>Attribute</code> argument, when given a measurement, can also get its accuracy in same time.</li>
    <li>In the common case of a <a href="DefaultFeatureType.html#isSimple()">simple feature</a> with characteristics
        that are constants, declaring them as attribute characteristics allows to specify the constants only once.</li>
  </ul>
  </div>

  Constant values of characteristics are given by their <a href="#getDefaultValue()">default value</a>.
  It is still possible for any specific <code>Attribute</code> instance to specify their own value,
  but <a href="DefaultFeatureType.html#isSimple()">simple feature</a> usually don't do that.

  <div class="section">Immutability and thread safety</div>
  Instances of this class are immutable if all properties (<a href="http://www.geoapi.org/3.0/javadoc/org/opengis/util/GenericName.html?is-external=true" title="class or interface in org.opengis.util" class="externalLink"><code>GenericName</code></a> and <a href="http://www.geoapi.org/3.0/javadoc/org/opengis/util/InternationalString.html?is-external=true" title="class or interface in org.opengis.util" class="externalLink"><code>InternationalString</code></a>
  instances) and all arguments (e.g. <code>defaultValue</code>) given to the constructor are also immutable.
  Such immutable instances can be shared by many objects and passed between threads without synchronization.

  <p>In particular, the <a href="#getDefaultValue()"><code>getDefaultValue()</code></a> method does <strong>not</strong> clone the returned value.
  This means that the same <code>defaultValue</code> instance may be shared by many <a href="AbstractAttribute.html" title="class in org.apache.sis.feature"><code>AbstractAttribute</code></a> instances.
  Consequently the default value should be immutable for avoiding unexpected behavior.</p></div>
 <dl>
 <dt><span class="simpleTagLabel">Since:</span></dt>
 <dd>0.5</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="DefaultFeatureType.html" title="class in org.apache.sis.feature"><code>DefaultFeatureType</code></a>,
 <a href="AbstractAttribute.html" title="class in org.apache.sis.feature"><code>AbstractAttribute</code></a>,
 <a href="../../../../serialized-form.html#org.apache.sis.feature.DefaultAttributeType">Serialized Form</a></dd>

 <p><font size="-1">Defined in the <code>sis-feature</code> module</font></p>
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 <h3>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></li>
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 <th class="colFirst" scope="col">Constructor</th>
 <th class="colLast" scope="col">Description</th>
 </tr>
 <tr class="altColor">
 <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.util.Map,java.lang.Class,int,int,V,org.apache.sis.feature.DefaultAttributeType...)">DefaultAttributeType</a></span>&#8203;(<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>&lt;<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>,&#8203;?&gt;&nbsp;identification,
                     <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;<a href="DefaultAttributeType.html" title="type parameter in DefaultAttributeType">V</a>&gt;&nbsp;valueClass,
                     int&nbsp;minimumOccurs,
                     int&nbsp;maximumOccurs,
                     <a href="DefaultAttributeType.html" title="type parameter in DefaultAttributeType">V</a>&nbsp;defaultValue,
                     <a href="DefaultAttributeType.html" title="class in org.apache.sis.feature">DefaultAttributeType</a>&lt;?&gt;...&nbsp;characterizedBy)</code></th>
 <td class="colLast">
 <div class="block">Constructs an attribute type from the given properties.</div>
 </td>
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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><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>&lt;<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>,&#8203;<a href="DefaultAttributeType.html" title="class in org.apache.sis.feature">DefaultAttributeType</a>&lt;?&gt;&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#characteristics()">characteristics</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Other attribute types that describes this attribute type.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#equals(java.lang.Object)">equals</a></span>&#8203;(<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>&nbsp;obj)</code></th>
 <td class="colLast">
 <div class="block">Compares this attribute type with the given object for equality.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code><a href="DefaultAttributeType.html" title="type parameter in DefaultAttributeType">V</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getDefaultValue()">getDefaultValue</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Returns the default value for the attribute.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>int</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMaximumOccurs()">getMaximumOccurs</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Returns the maximum number of attribute values.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>int</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMinimumOccurs()">getMinimumOccurs</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Returns the minimum number of attribute values.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;<a href="DefaultAttributeType.html" title="type parameter in DefaultAttributeType">V</a>&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getValueClass()">getValueClass</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Returns the type of attribute values.</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code>int</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#hashCode()">hashCode</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Returns a hash code value for this attribute type.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code><a href="AbstractAttribute.html" title="class in org.apache.sis.feature">AbstractAttribute</a>&lt;<a href="DefaultAttributeType.html" title="type parameter in DefaultAttributeType">V</a>&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#newInstance()">newInstance</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Creates a new attribute instance of this type initialized to the <a href="#getDefaultValue()">default value</a>.</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <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="#toString()">toString</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Returns a string representation of this attribute type.</div>
 </td>
 </tr>
 </table>
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 <!--   -->
 </a>
 <h3>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></li>
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 <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang" class="externalLink">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait(long,int)" title="class or interface in java.lang" class="externalLink">wait</a></code></li>
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 <h3>Constructor Detail</h3>
 <a id="&lt;init&gt;(java.util.Map,java.lang.Class,int,int,java.lang.Object,org.apache.sis.feature.DefaultAttributeType[])">
 <!--   -->
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 <h4>DefaultAttributeType</h4>
 <pre>public&nbsp;DefaultAttributeType&#8203;(<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>&lt;<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>,&#8203;?&gt;&nbsp;identification,
                             <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;<a href="DefaultAttributeType.html" title="type parameter in DefaultAttributeType">V</a>&gt;&nbsp;valueClass,
                             int&nbsp;minimumOccurs,
                             int&nbsp;maximumOccurs,
                             <a href="DefaultAttributeType.html" title="type parameter in DefaultAttributeType">V</a>&nbsp;defaultValue,
                             <a href="DefaultAttributeType.html" title="class in org.apache.sis.feature">DefaultAttributeType</a>&lt;?&gt;...&nbsp;characterizedBy)</pre>
 <div class="block">Constructs an attribute type 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/util/GenericName.html?is-external=true" title="class or interface in org.opengis.util" class="externalLink"><code>GenericName</code></a> or <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"><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/util/InternationalString.html?is-external=true" title="class or interface in org.opengis.util" class="externalLink"><code>InternationalString</code></a> or <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"><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/util/InternationalString.html?is-external=true" title="class or interface in org.opengis.util" class="externalLink"><code>InternationalString</code></a> or <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"><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/util/InternationalString.html?is-external=true" title="class or interface in org.opengis.util" class="externalLink"><code>InternationalString</code></a> or <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"><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/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang" class="externalLink"><code>Boolean</code></a></td>
      <td><a href="AbstractIdentifiedType.html#isDeprecated()"><code>AbstractIdentifiedType.isDeprecated()</code></a></td>
    </tr>
  </table></div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>identification</code> - the name and other information to be given to this attribute type.</dd>
 <dd><code>valueClass</code> - the type of attribute values.</dd>
 <dd><code>minimumOccurs</code> - the minimum number of occurrences of the attribute within its containing entity.</dd>
 <dd><code>maximumOccurs</code> - the maximum number of occurrences of the attribute within its containing entity,
                          or <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true#MAX_VALUE" title="class or interface in java.lang" class="externalLink"><code>Integer.MAX_VALUE</code></a> if there is no restriction.</dd>
 <dd><code>defaultValue</code> - the default value for the attribute, or <code>null</code> if none.</dd>
 <dd><code>characterizedBy</code> - other attribute types that describes this attribute type (can be <code>null</code> for none).
                          For example if this new <code>DefaultAttributeType</code> describes a measurement,
                          then <code>characterizedBy</code> could holds the measurement accuracy.
                          See <cite>"Attribute characterization"</cite> in class Javadoc for more information.</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="builder/AttributeTypeBuilder.html" title="class in org.apache.sis.feature.builder"><code>AttributeTypeBuilder</code></a></dd>
 </dl>
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 <pre class="methodSignature">public final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;<a href="DefaultAttributeType.html" title="type parameter in DefaultAttributeType">V</a>&gt;&nbsp;getValueClass()</pre>
 <div class="block">Returns the type of attribute values.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the type of attribute values.</dd>
 </dl>
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 </ul>
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 <pre class="methodSignature">public final&nbsp;int&nbsp;getMinimumOccurs()</pre>
 <div class="block">Returns the minimum number of attribute values.
  The returned value is greater than or equal to zero.

  <p>To be valid, an <code>Attribute</code> instance of this <code>AttributeType</code> shall have at least
  this minimum number of elements in its <a href="AbstractAttribute.html#getValues()"><code>collection of values</code></a>.</p></div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the minimum number of attribute values.</dd>
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 <pre class="methodSignature">public final&nbsp;int&nbsp;getMaximumOccurs()</pre>
 <div class="block">Returns the maximum number of attribute values.
  The returned value is greater than or equal to the <a href="#getMinimumOccurs()"><code>getMinimumOccurs()</code></a> value.
  If there is no maximum, then this method returns <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true#MAX_VALUE" title="class or interface in java.lang" class="externalLink"><code>Integer.MAX_VALUE</code></a>.

  <p>To be valid, an <code>Attribute</code> instance of this <code>AttributeType</code> shall have no more than
  this maximum number of elements in its <a href="AbstractAttribute.html#getValues()"><code>collection of values</code></a>.</p></div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the maximum number of attribute values, or <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true#MAX_VALUE" title="class or interface in java.lang" class="externalLink"><code>Integer.MAX_VALUE</code></a> if none.</dd>
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 <pre class="methodSignature">public&nbsp;<a href="DefaultAttributeType.html" title="type parameter in DefaultAttributeType">V</a>&nbsp;getDefaultValue()</pre>
 <div class="block">Returns the default value for the attribute.
  This value is used when an attribute is created and no value for it is specified.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the default value for the attribute, or <code>null</code> if none.</dd>
 </dl>
 </li>
 </ul>
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 <h4>characteristics</h4>
 <pre class="methodSignature">public&nbsp;<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>&lt;<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>,&#8203;<a href="DefaultAttributeType.html" title="class in org.apache.sis.feature">DefaultAttributeType</a>&lt;?&gt;&gt;&nbsp;characteristics()</pre>
 <div class="block">Other attribute types that describes this attribute type.
  See <cite>"Attribute characterization"</cite> in class Javadoc for more information.

  <div class="note"><b>Example:</b>
  An attribute that carries a measurement (e.g. air temperature) may have another attribute that holds the
  measurement accuracy. The accuracy is often constant for all measurements in a dataset, but not necessarily.
  If the accuracy is a constant, then the characteristics <a href="#getDefaultValue()">default value</a>
  shall hold that constant.
  </div>

  The characteristics are enumerated in the <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#values()" title="class or interface in java.util" class="externalLink">map values</a>.
  The <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#keySet()" title="class or interface in java.util" class="externalLink">map keys</a> are the <code>String</code> representations
  of characteristics <a href="AbstractIdentifiedType.html#getName()">name</a>, for more convenient lookups.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>other attribute types that describes this attribute type, or an empty map if none.</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="AbstractAttribute.html#characteristics()"><code>AbstractAttribute.characteristics()</code></a></dd>
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 <pre class="methodSignature">public&nbsp;<a href="AbstractAttribute.html" title="class in org.apache.sis.feature">AbstractAttribute</a>&lt;<a href="DefaultAttributeType.html" title="type parameter in DefaultAttributeType">V</a>&gt;&nbsp;newInstance()</pre>
 <div class="block">Creates a new attribute instance of this type initialized to the <a href="#getDefaultValue()">default value</a>.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a new attribute instance.</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="AbstractAttribute.html#create(org.apache.sis.feature.DefaultAttributeType)"><code>AbstractAttribute.create(DefaultAttributeType)</code></a></dd>
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 <pre class="methodSignature">public&nbsp;int&nbsp;hashCode()</pre>
 <div class="block">Returns a hash code value for this attribute type.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the hash code for this type.</dd>
 </dl>
 </li>
 </ul>
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 <pre class="methodSignature">public&nbsp;boolean&nbsp;equals&#8203;(<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>&nbsp;obj)</pre>
 <div class="block">Compares this attribute type with the given object for equality.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>obj</code> - the object to compare with this type.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd><code>true</code> if the given object is equals to this type.</dd>
 </dl>
 </li>
 </ul>
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 <!--   -->
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 <h4>toString</h4>
 <pre class="methodSignature">public&nbsp;<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>&nbsp;toString()</pre>
 <div class="block">Returns a string representation of this attribute type.
  The returned string is for debugging purpose and may change in any future SIS version.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang" class="externalLink">toString</a></code>&nbsp;in class&nbsp;<code><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></code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a string representation of this attribute type for debugging purpose.</dd>
 </dl>
 </li>
 </ul>
 </li>
 </ul>
 </section>
 </li>
 </ul>
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