metadataentity.html

Geotools是一个开源的Java GIS工具包,可利用它来开发符合标准的地理信息系统。Geotools提供了OGC(Open Geospatial Consortium)规范的一个实现来作为他们的

 following heuristic tests:<br>

 <ul>
   <li>If the specified object is an instance of , then
       <A HREF="../../../../org/geotools/metadata/iso/MetadataEntity.html#unmodifiable()"><CODE>unmodifiable()</CODE></A> is invoked on this object.</li>
   <li>Otherwise, if the object is a cloneable
       <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Collection.html" title="class or interface in java.util">collection</A>, then the collection is cloned and all its
       elements are replaced by their unmodifiable variant. If the collection is not
       cloneable, then it is assumed immutable and returned unchanged.</li>
   <li>Otherwise, the object is assumed immutable and returned unchanged.</li>
 </ul>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>object</CODE> - The object to convert in an immutable one.
<DT><B>Returns:</B><DD>A presumed immutable view of the specified object.</DL>
</DD>
</DL>
<HR>

<A NAME="freeze()"><!-- --></A><H3>
freeze</H3>
<PRE>
protected void <B>freeze</B>()</PRE>
<DL>
<DD>Declare this metadata and all its attributes as unmodifiable. This method is invoked
 automatically by the <A HREF="../../../../org/geotools/metadata/iso/MetadataEntity.html#unmodifiable()"><CODE>unmodifiable()</CODE></A> method. Subclasses should overrides
 this method and invokes <A HREF="../../../../org/geotools/metadata/iso/MetadataEntity.html#unmodifiable(java.lang.Object)"><CODE>unmodifiable(Object)</CODE></A> for all attributes.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="checkWritePermission()"><!-- --></A><H3>
checkWritePermission</H3>
<PRE>
protected void <B>checkWritePermission</B>()
                             throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/UnsupportedOperationException.html" title="class or interface in java.lang">UnsupportedOperationException</A></PRE>
<DL>
<DD>Check if changes in the metadata are allowed. All  methods in
 sub-classes should invoke this method before to apply any change.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/UnsupportedOperationException.html" title="class or interface in java.lang">UnsupportedOperationException</A></CODE> - if this metadata is unmodifiable.</DL>
</DD>
</DL>
<HR>

<A NAME="copyCollection(java.util.Collection, java.util.Collection, java.lang.Class)"><!-- --></A><H3>
copyCollection</H3>
<PRE>
protected final <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Collection.html" title="class or interface in java.util">Collection</A> <B>copyCollection</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Collection.html" title="class or interface in java.util">Collection</A>&nbsp;source,
                                          <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Collection.html" title="class or interface in java.util">Collection</A>&nbsp;target,
                                          <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Class.html" title="class or interface in java.lang">Class</A>&nbsp;elementType)</PRE>
<DL>
<DD>Copy the content of one collection () into an other ().
 If the target collection is , or if its type (<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/List.html" title="class or interface in java.util"><CODE>List</CODE></A> vs <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Set.html" title="class or interface in java.util"><CODE>Set</CODE></A>)
 doesn't matches the type of the source collection, a new target collection is expected.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The source collection.<DD><CODE>target</CODE> - The target collection, or  if not yet created.<DD><CODE>elementType</CODE> - The base type of elements to put in the collection.
<DT><B>Returns:</B><DD>, or a newly created collection.</DL>
</DD>
</DL>
<HR>

<A NAME="nonNullCollection(java.util.Collection, java.lang.Class)"><!-- --></A><H3>
nonNullCollection</H3>
<PRE>
protected final <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Collection.html" title="class or interface in java.util">Collection</A> <B>nonNullCollection</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Collection.html" title="class or interface in java.util">Collection</A>&nbsp;c,
                                             <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Class.html" title="class or interface in java.lang">Class</A>&nbsp;elementType)</PRE>
<DL>
<DD>Returns the specified collection, or a new one if  is null.
 This is a convenience method for implementation of 
 methods.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>c</CODE> - The collection to checks.<DD><CODE>elementType</CODE> - The element type (used only if  is null).
<DT><B>Returns:</B><DD>, or a new collection if  is null.</DL>
</DD>
</DL>
<HR>

<A NAME="appendLineSeparator(java.lang.StringBuffer)"><!-- --></A><H3>
appendLineSeparator</H3>
<PRE>
protected static void <B>appendLineSeparator</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/StringBuffer.html" title="class or interface in java.lang">StringBuffer</A>&nbsp;buffer)</PRE>
<DL>
<DD>Add a line separator to the given buffer, except if the buffer is empty.
 This convenience method is used for <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#toString()" title="class or interface in java.lang"><CODE>Object.toString()</CODE></A> implementations.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
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