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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.sis.storage</a></div>
<h2 title="Class FeatureNaming" class="title">Class FeatureNaming&lt;E&gt;</h2>
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<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>E</code> - the type of elements associated with the names.</dd>
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<pre>public class <span class="typeNameLabel">FeatureNaming&lt;E&gt;</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></pre>
<div class="block">Helper class for mapping <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> instances and their shortened names to features.
The features are typically represented by instances of <code>Feature­Type</code>
or <code>Coverage</code> (sometime seen as a kind of features), but this class
actually puts no restriction on the kind of object associated to <code>Generic­Name</code>s;
<a href="DataStore.html" title="class in org.apache.sis.storage"><code>Data­Store</code></a> implementations are free to choose their internal object.
Those objects can be stored and fetched using the <code>String</code> representation of their name
as given by <a href="http://www.geoapi.org/3.0/javadoc/org/opengis/util/GenericName.html?is-external=true#toString()" title="class or interface in org.opengis.util" class="externalLink"><code>Generic­Name​.to­String()</code></a>, or a shortened name when there is no ambiguity.
<div class="note"><b>Example:</b>
a data store may contain a <code>Feature­Type</code> named <code>"foo:bar"</code>.
If that feature type has been binded like below:
<blockquote><pre>FeatureNaming&lt;FeatureType&gt; binding = <font color="green">new</font> FeatureNaming&lt;&gt;();
FeatureType myFooBar = ...; <i><font color="gray">// Some type named "foo:bar" for this example.</font></i>
binding.<b>add</b>(<font color="green">null</font>, myFooBar.<b>getName</b>(), myFooBar);</pre></blockquote>
Then the two following lines return the same instance:
<blockquote><pre><font color="green">assert</font> binding.<b>get</b>(<font color="green">null</font>, <font color="orangered">"foo:bar"</font>) == myFooBar;
<font color="green">assert</font> binding.<b>get</b>(<font color="green">null</font>, <font color="orangered">"bar"</font>) == myFooBar; <i><font color="gray">// Allowed only if there is no ambiguity.</font></i></pre></blockquote>
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Note that contrarily to the standard <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#get(java.lang.Object)" title="class or interface in java.util" class="externalLink"><code>Map​.get(Object)</code></a> method contract, the <a href="#get(org.apache.sis.storage.DataStore,java.lang.String)"><code>get(…)</code></a>
method defined in this class throws an exception instead than returning <code>null</code> if no unambiguous mapping
can be established for the given name. This behavior allows <code>Feature­Naming</code> to produce an error message
telling why the operation can not succeed.
<div class="section">Managing the list of generic names</div>
This class does not memorize the list of <a href="#add(org.apache.sis.storage.DataStore,org.opengis.util.GenericName,E)">added</a> <code>Generic­Name</code> instances. Instead this
class memorizes only their string representations, thus protecting the binding from any change in the original
<code>Generic­Name</code> instances. The list of feature names should instead be included in the ISO 19115 metadata
returned by <a href="DataStore.html#getMetadata()"><code>Data­Store​.get­Metadata()</code></a>. The path to feature names is:
<blockquote><code>metadata</code> /
<a href="../metadata/iso/DefaultMetadata.html#getContentInfo()"><code>content­Info</code></a> /
<a href="../metadata/iso/content/DefaultFeatureCatalogueDescription.html#getFeatureTypeInfo()"><code>feature­Types</code></a> /
<a href="../metadata/iso/content/DefaultFeatureTypeInfo.html#getFeatureTypeName()"><code>feature­Type­Name</code></a>
</blockquote>
Note that above metadata information are not necessarily structured as a flat list; a <code>Data­Store</code> may group
some feature information in different <a href="http://www.geoapi.org/3.0/javadoc/org/opengis/metadata/content/FeatureCatalogueDescription.html?is-external=true" title="class or interface in org.opengis.metadata.content" class="externalLink"><code>Feature­Catalogue­Description</code></a> instances.
This is one reason why we let the data store manages <code>Generic­Name</code> lists itself.
<div class="section">Thread safety</div>
A <code>Feature­Naming</code> instance is thread-safe only if constructed once and never modified after publication.
For example it is safe to initialize a <code>Feature­Naming</code> in a <a href="DataStore.html" title="class in org.apache.sis.storage"><code>Data­Store</code></a> or <a href="DataStoreProvider.html" title="class in org.apache.sis.storage"><code>Data­Store­Provider</code></a>
constructor if the result is stored in a private final field with no public accessor
and no call to <a href="#add(org.apache.sis.storage.DataStore,org.opengis.util.GenericName,E)"><code>add(…)</code></a> or <a href="#remove(org.apache.sis.storage.DataStore,org.opengis.util.GenericName)"><code>remove(…)</code></a> methods after construction.
If this condition does not hold, then synchronization (if desired) is caller's responsibility.
The caller is typically the <code>Data­Store</code> implementation which contains this <code>Feature­Naming</code> instance.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>0.8</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../util/iso/AbstractName.html" title="class in org.apache.sis.util.iso"><code>Abstract­Name</code></a>,
<a href="../feature/DefaultFeatureType.html" title="class in org.apache.sis.feature"><code>Default­Feature­Type</code></a>,
<a href="../metadata/iso/content/DefaultFeatureTypeInfo.html" title="class in org.apache.sis.metadata.iso.content"><code>Default­Feature­Type­Info</code></a></dd>
<p><font size="-1">Defined in the <code>sis-storage</code> module</font></p>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">FeatureNaming</a></span>()</code></th>
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<div class="block">Creates a new "<code>Generic­Name</code> to object" mapping.</div>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#add(org.apache.sis.storage.DataStore,org.opengis.util.GenericName,E)">add</a></span>&#8203;(<a href="DataStore.html" title="class in org.apache.sis.storage">DataStore</a>&nbsp;store,
<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">GenericName</a>&nbsp;name,
<a href="FeatureNaming.html" title="type parameter in FeatureNaming">E</a>&nbsp;value)</code></th>
<td class="colLast">
<div class="block">Adds a value for the given name if none exist.</div>
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<td class="colFirst"><code><a href="FeatureNaming.html" title="type parameter in FeatureNaming">E</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get(org.apache.sis.storage.DataStore,java.lang.String)">get</a></span>&#8203;(<a href="DataStore.html" title="class in org.apache.sis.storage">DataStore</a>&nbsp;store,
<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;name)</code></th>
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<div class="block">Returns the value associated to the given name.</div>
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<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#remove(org.apache.sis.storage.DataStore,org.opengis.util.GenericName)">remove</a></span>&#8203;(<a href="DataStore.html" title="class in org.apache.sis.storage">DataStore</a>&nbsp;store,
<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">GenericName</a>&nbsp;name)</code></th>
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<div class="block">Removes the value associated to the given name.</div>
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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#equals(java.lang.Object)" title="class or interface in java.lang" class="externalLink">equals</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#hashCode()" title="class or interface in java.lang" class="externalLink">hash­Code</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#toString()" title="class or interface in java.lang" class="externalLink">to­String</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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<h4>FeatureNaming</h4>
<pre>public&nbsp;FeatureNaming()</pre>
<div class="block">Creates a new "<code>Generic­Name</code> to object" mapping.</div>
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<h4>get</h4>
<pre class="methodSignature">public&nbsp;<a href="FeatureNaming.html" title="type parameter in FeatureNaming">E</a>&nbsp;get&#8203;(<a href="DataStore.html" title="class in org.apache.sis.storage">DataStore</a>&nbsp;store,
<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;name)
throws <a href="IllegalNameException.html" title="class in org.apache.sis.storage">IllegalNameException</a></pre>
<div class="block">Returns the value associated to the given name.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>store</code> - the data store for which to get a value, or <code>null</code> if unknown.</dd>
<dd><code>name</code> - the name for which to get a value.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>value associated to the given object.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="IllegalNameException.html" title="class in org.apache.sis.storage">Illegal­Name­Exception</a></code> - if the given name was not found or is ambiguous.</dd>
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<h4>add</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;add&#8203;(<a href="DataStore.html" title="class in org.apache.sis.storage">DataStore</a>&nbsp;store,
<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">GenericName</a>&nbsp;name,
<a href="FeatureNaming.html" title="type parameter in FeatureNaming">E</a>&nbsp;value)
throws <a href="IllegalNameException.html" title="class in org.apache.sis.storage">IllegalNameException</a></pre>
<div class="block">Adds a value for the given name if none exist.
If a previous value already exists for the given name, then an exception is thrown.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>store</code> - the data store for which to add a value, or <code>null</code> if unknown.</dd>
<dd><code>name</code> - the name for which to add a value.</dd>
<dd><code>value</code> - the value to add (can not be null).</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="IllegalNameException.html" title="class in org.apache.sis.storage">Illegal­Name­Exception</a></code> - if another element is already registered for the given name.</dd>
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<h4>remove</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;remove&#8203;(<a href="DataStore.html" title="class in org.apache.sis.storage">DataStore</a>&nbsp;store,
<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">GenericName</a>&nbsp;name)
throws <a href="IllegalNameException.html" title="class in org.apache.sis.storage">IllegalNameException</a></pre>
<div class="block">Removes the value associated to the given name.
If no value is associated to the given name, then this method does nothing.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>store</code> - the data store for which to remove a value, or <code>null</code> if unknown.</dd>
<dd><code>name</code> - the name for which to remove value.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>true</code> if the value was removed, or <code>false</code> if no value was defined for the given name.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="IllegalNameException.html" title="class in org.apache.sis.storage">Illegal­Name­Exception</a></code> - if inconsistency are found between the given name and the one which was given
to the <a href="#add(org.apache.sis.storage.DataStore,org.opengis.util.GenericName,E)"><code>add(…)</code></a> method. An example of inconsistency is a name having the same string
representation, but for which <a href="http://www.geoapi.org/3.0/javadoc/org/opengis/util/ScopedName.html?is-external=true#tail()" title="class or interface in org.opengis.util" class="externalLink"><code>Scoped­Name​.tail()</code></a> returns different values.</dd>
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