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CollectionUtils (Apache Ant API)
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org.apache.tools.ant.util
 
Class CollectionUtils</H2>
<PRE>
java.lang.Object
 <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by ">org.apache.tools.ant.util.CollectionUtils
</PRE>
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<DL>
<DT><PRE>public class CollectionUtils<DT>extends java.lang.Object</DL>
</PRE>

A set of helper methods related to collection manipulation.

<DL>
<DT>Since:</DT>
 <DD>Ant 1.5</DD>
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<CODE>static&nbsp;class</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/CollectionUtils.EmptyEnumeration.html" title="class in org.apache.tools.ant.util">CollectionUtils.EmptyEnumeration</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;An empty enumeration.</TD>
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<CODE>static&nbsp;java.util.List</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/CollectionUtils.html#EMPTY_LIST">EMPTY_LIST</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Collections.emptyList() is Java5+.</TD>
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<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/CollectionUtils.html#CollectionUtils()">CollectionUtils</A>()</CODE>

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<CODE>static&nbsp;java.util.Enumeration</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/CollectionUtils.html#append(java.util.Enumeration, java.util.Enumeration)">append</A>(java.util.Enumeration&nbsp;e1,
 java.util.Enumeration&nbsp;e2)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Append one enumeration to another.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.util.Collection</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/CollectionUtils.html#asCollection(java.util.Iterator)">asCollection</A>(java.util.Iterator&nbsp;iter)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns a collection containg all elements of the iterator.</TD>
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<CODE>static&nbsp;java.util.Enumeration</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/CollectionUtils.html#asEnumeration(java.util.Iterator)">asEnumeration</A>(java.util.Iterator&nbsp;iter)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Adapt the specified Iterator to the Enumeration interface.</TD>
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<CODE>static&nbsp;java.util.Iterator</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/CollectionUtils.html#asIterator(java.util.Enumeration)">asIterator</A>(java.util.Enumeration&nbsp;e)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Adapt the specified Enumeration to the Iterator interface.</TD>
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<CODE>static&nbsp;boolean</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/CollectionUtils.html#equals(java.util.Dictionary, java.util.Dictionary)">equals</A>(java.util.Dictionary&nbsp;d1,
 java.util.Dictionary&nbsp;d2)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Deprecated.&nbsp;since 1.6.x.</TD>
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<CODE>static&nbsp;boolean</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/CollectionUtils.html#equals(java.util.Vector, java.util.Vector)">equals</A>(java.util.Vector&nbsp;v1,
 java.util.Vector&nbsp;v2)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Deprecated.&nbsp;since 1.6.x.</TD>
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<CODE>static&nbsp;java.lang.String</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/CollectionUtils.html#flattenToString(java.util.Collection)">flattenToString</A>(java.util.Collection&nbsp;c)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Creates a comma separated list of all values held in the given
 collection.</TD>
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<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/CollectionUtils.html#frequency(java.util.Collection, java.lang.Object)">frequency</A>(java.util.Collection&nbsp;c,
 java.lang.Object&nbsp;o)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Counts how often the given Object occurs in the given
 collection using equals() for comparison.</TD>
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<CODE>static&nbsp;void</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/CollectionUtils.html#putAll(java.util.Dictionary, java.util.Dictionary)">putAll</A>(java.util.Dictionary&nbsp;m1,
 java.util.Dictionary&nbsp;m2)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Deprecated.&nbsp;since 1.6.x.</TD>
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<TH ALIGN="left">Methods inherited from class java.lang.Object</TH>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="EMPTY_LIST"></A><H3>
EMPTY_LIST</H3>
<PRE>
public static final java.util.List EMPTY_LIST</PRE>
<DL>
<DD>Collections.emptyList() is Java5+.

<DL>
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<A NAME="CollectionUtils()"></A><H3>
CollectionUtils</H3>
<PRE>
public CollectionUtils()</PRE>
<DL>
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<A NAME="equals(java.util.Vector, java.util.Vector)"></A><H3>
equals</H3>
<PRE>
public static boolean equals(java.util.Vector&nbsp;v1,
 java.util.Vector&nbsp;v2)</PRE>
<DL>
<DD>Deprecated.&nbsp;since 1.6.x.

<DD>Please use Vector.equals() or List.equals().

<DD><DL>
<DT>Parameters:<DD><CODE>v1</CODE> - the first vector.<DD><CODE>v2</CODE> - the second vector.
<DT>Returns:<DD>true if the vectors are equal.<DT>Since:</DT>
 <DD>Ant 1.5</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="equals(java.util.Dictionary, java.util.Dictionary)"></A><H3>
equals</H3>
<PRE>
public static boolean equals(java.util.Dictionary&nbsp;d1,
 java.util.Dictionary&nbsp;d2)</PRE>
<DL>
<DD>Deprecated.&nbsp;since 1.6.x.

<DD>Dictionary does not have an equals.
 Please use Map.equals().

Follows the equals contract of Java 2's Map.

<DD><DL>
<DT>Parameters:<DD><CODE>d1</CODE> - the first directory.<DD><CODE>d2</CODE> - the second directory.
<DT>Returns:<DD>true if the directories are equal.<DT>Since:</DT>
 <DD>Ant 1.5</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="flattenToString(java.util.Collection)"></A><H3>
flattenToString</H3>
<PRE>
public static java.lang.String flattenToString(java.util.Collection&nbsp;c)</PRE>
<DL>
<DD>Creates a comma separated list of all values held in the given
 collection.

<DD><DL>
<DT>Since:</DT>
 <DD>Ant 1.8.0</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="putAll(java.util.Dictionary, java.util.Dictionary)"></A><H3>
putAll</H3>
<PRE>
public static void putAll(java.util.Dictionary&nbsp;m1,
 java.util.Dictionary&nbsp;m2)</PRE>
<DL>
<DD>Deprecated.&nbsp;since 1.6.x.

<DD>Dictionary does not know the putAll method. Please use Map.putAll().

<DD><DL>
<DT>Parameters:<DD><CODE>m1</CODE> - the to directory.<DD><CODE>m2</CODE> - the from directory.<DT>Since:</DT>
 <DD>Ant 1.6</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="append(java.util.Enumeration, java.util.Enumeration)"></A><H3>
append</H3>
<PRE>
public static java.util.Enumeration append(java.util.Enumeration&nbsp;e1,
 java.util.Enumeration&nbsp;e2)</PRE>
<DL>
<DD>Append one enumeration to another.
 Elements are evaluated lazily.

<DD><DL>
<DT>Parameters:<DD><CODE>e1</CODE> - the first enumeration.<DD><CODE>e2</CODE> - the subsequent enumeration.
<DT>Returns:<DD>an enumeration representing e1 followed by e2.<DT>Since:</DT>
 <DD>Ant 1.6.3</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="asEnumeration(java.util.Iterator)"></A><H3>
asEnumeration</H3>
<PRE>
public static java.util.Enumeration asEnumeration(java.util.Iterator&nbsp;iter)</PRE>
<DL>
<DD>Adapt the specified Iterator to the Enumeration interface.

<DD><DL>
<DT>Parameters:<DD><CODE>iter</CODE> - the Iterator to adapt.
<DT>Returns:<DD>an Enumeration.</DL>
</DD>
</DL>
<HR>

<A NAME="asIterator(java.util.Enumeration)"></A><H3>
asIterator</H3>
<PRE>
public static java.util.Iterator asIterator(java.util.Enumeration&nbsp;e)</PRE>
<DL>
<DD>Adapt the specified Enumeration to the Iterator interface.

<DD><DL>
<DT>Parameters:<DD><CODE>e</CODE> - the Enumeration to adapt.
<DT>Returns:<DD>an Iterator.</DL>
</DD>
</DL>
<HR>

<A NAME="asCollection(java.util.Iterator)"></A><H3>
asCollection</H3>
<PRE>
public static java.util.Collection asCollection(java.util.Iterator&nbsp;iter)</PRE>
<DL>
<DD>Returns a collection containg all elements of the iterator.

<DD><DL>
<DT>Since:</DT>
 <DD>Ant 1.8.0</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="frequency(java.util.Collection, java.lang.Object)"></A><H3>
frequency</H3>
<PRE>
public static int frequency(java.util.Collection&nbsp;c,
 java.lang.Object&nbsp;o)</PRE>
<DL>
<DD>Counts how often the given Object occurs in the given
 collection using equals() for comparison.

<DD><DL>
<DT>Since:</DT>
 <DD>Ant 1.8.0</DD>
</DL>
</DD>
</DL>

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