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: Interface  Task
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org.apache.ant.tasks</FONT>
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Interface  Task</H2>
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<DL>
<DT>public interface <B>Task</B></DL>

<P>
Task is the core interface for all structures that will be processed by the
 TaskEngine.
<P>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#EXECUTION_MODE_EXPLICIT">EXECUTION_MODE_EXPLICIT</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#EXECUTION_MODE_IMPLICIT">EXECUTION_MODE_IMPLICIT</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#EXECUTION_MODE_PRIORITY">EXECUTION_MODE_PRIORITY</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;char</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#NAME_SEPARATOR">NAME_SEPARATOR</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#execute(org.apache.ant.engine.TaskEngine)">execute</A></B>(org.apache.ant.engine.TaskEngine&nbsp;engine)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Causes the existing Task implementation to execute.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#getAttributeValue(java.lang.String)">getAttributeValue</A></B>(java.lang.String&nbsp;name)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Each Task will hold its attributes in some manner.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../org/apache/ant/tasks/Task.html">Task</A>[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#getChildren()">getChildren</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the an array of Task objects that are subordinate to this Task.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#getExecutionMode()">getExecutionMode</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Determines whether this Task is executed whenever its parent is executed,
 or if its execution must be specifically requested.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#getFullyQualifiedName()">getFullyQualifiedName</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The "fully-qualified" name of a Task is the Task's name, prepended by its
 parent's name, prepended by its parent's name, etc.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../org/apache/ant/tasks/Task.html">Task</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#getParent()">getParent</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns this Task's parent Task.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../org/apache/ant/tasks/Task.html">Task</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#getRootTask()">getRootTask</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Proceed backwards through the nodes until we come across the first Task
 in the tree.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../org/apache/ant/tasks/Task.html">Task</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#getTask(java.lang.String)">getTask</A></B>(java.lang.String&nbsp;taskPath)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A mechanism for locating a task relative to the current task.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#getTaskName()">getTaskName</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Just a simple name used to identify a Task.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#init(org.apache.ant.engine.TaskEngine)">init</A></B>(org.apache.ant.engine.TaskEngine&nbsp;engine)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Called when the Task first gets "noticed" by the TaskEngine.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#isPropertyContainer()">isPropertyContainer</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Determines whether a Task is suitable for holding property values.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#setParent(org.apache.ant.tasks.Task)">setParent</A></B>(<A HREF="../../../../org/apache/ant/tasks/Task.html">Task</A>&nbsp;parent)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the Task's parent.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/ant/tasks/Task.html#validate()">validate</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Each Task should have the ability to validate its state.</TD>
</TR>
</TABLE>
&nbsp;
<P>

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<A NAME="EXECUTION_MODE_IMPLICIT"><!-- --></A><H3>
EXECUTION_MODE_IMPLICIT</H3>
<PRE>
public static final int <B>EXECUTION_MODE_IMPLICIT</B></PRE>
<DL>
</DL>
<HR>

<A NAME="EXECUTION_MODE_EXPLICIT"><!-- --></A><H3>
EXECUTION_MODE_EXPLICIT</H3>
<PRE>
public static final int <B>EXECUTION_MODE_EXPLICIT</B></PRE>
<DL>
</DL>
<HR>

<A NAME="EXECUTION_MODE_PRIORITY"><!-- --></A><H3>
EXECUTION_MODE_PRIORITY</H3>
<PRE>
public static final int <B>EXECUTION_MODE_PRIORITY</B></PRE>
<DL>
</DL>
<HR>

<A NAME="NAME_SEPARATOR"><!-- --></A><H3>
NAME_SEPARATOR</H3>
<PRE>
public static final char <B>NAME_SEPARATOR</B></PRE>
<DL>
</DL>

<!-- ========= CONSTRUCTOR DETAIL ======== -->


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<A NAME="execute(org.apache.ant.engine.TaskEngine)"><!-- --></A><H3>
execute</H3>
<PRE>
public void <B>execute</B>(org.apache.ant.engine.TaskEngine&nbsp;engine)
             throws org.apache.ant.AntException</PRE>
<DL>
<DD>Causes the existing Task implementation to execute.</DL>
<HR>

<A NAME="init(org.apache.ant.engine.TaskEngine)"><!-- --></A><H3>
init</H3>
<PRE>
public void <B>init</B>(org.apache.ant.engine.TaskEngine&nbsp;engine)
          throws org.apache.ant.AntException</PRE>
<DL>
<DD>Called when the Task first gets "noticed" by the TaskEngine.</DL>
<HR>

<A NAME="validate()"><!-- --></A><H3>
validate</H3>
<PRE>
public void <B>validate</B>()
              throws org.apache.ant.AntException</PRE>
<DL>
<DD>Each Task should have the ability to validate its state. This would be
 invoked by the TaskEngine prior to commencing an execution cycle.</DL>
<HR>

<A NAME="getTaskName()"><!-- --></A><H3>
getTaskName</H3>
<PRE>
public java.lang.String <B>getTaskName</B>()</PRE>
<DL>
<DD>Just a simple name used to identify a Task. This name is only sufficient
 for simple debugging and GUI output. It does not uniquely identify a
 Task.<DD><DL>
<DT><B>See Also: </B><DD><A HREF="../../../../org/apache/ant/tasks/Task.html#getFullyQualifiedName()"><CODE>getFullyQualifiedName()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getTask(java.lang.String)"><!-- --></A><H3>
getTask</H3>
<PRE>
public <A HREF="../../../../org/apache/ant/tasks/Task.html">Task</A> <B>getTask</B>(java.lang.String&nbsp;taskPath)</PRE>
<DL>
<DD>A mechanism for locating a task relative to the current task. This
 navigation sceme will mimic a typical OS system. '..' will move back
 a level in the Task tree. If taskPath begins with '/' then the root node
 will be used as a starting point.
 <p></p>
 Returns null of no task is found at this location.</DL>
<HR>

<A NAME="getRootTask()"><!-- --></A><H3>
getRootTask</H3>
<PRE>
public <A HREF="../../../../org/apache/ant/tasks/Task.html">Task</A> <B>getRootTask</B>()</PRE>
<DL>
<DD>Proceed backwards through the nodes until we come across the first Task
 in the tree. This is the root Task.</DL>
<HR>

<A NAME="getFullyQualifiedName()"><!-- --></A><H3>
getFullyQualifiedName</H3>
<PRE>
public java.lang.String <B>getFullyQualifiedName</B>()</PRE>
<DL>
<DD>The "fully-qualified" name of a Task is the Task's name, prepended by its
 parent's name, prepended by its parent's name, etc. This method may be
 used by the Task's hashCode() method to calculate a hash that will
 uniquely identify a Task.</DL>
<HR>

<A NAME="getExecutionMode()"><!-- --></A><H3>
getExecutionMode</H3>
<PRE>
public int <B>getExecutionMode</B>()</PRE>
<DL>
<DD>Determines whether this Task is executed whenever its parent is executed,
 or if its execution must be specifically requested.
 <p></p>
 <dl><dt>EXECUTION_MODE_EXPLICIT</dt>
 <dd>Requires interaction by the TaskEngine in order to execute.</dd>
 <dt>EXECUTION_MODE_IMPLICIT</dt>
 <dd>This Task is automatically executed when its parent is
 executed.</dd>
 <dt>EXECUTION_MODE_PRIORITY</dt>
 <dd>These Tasks are executed prior to its parent's execution</dd></dl>
 <p></p>
 The default mode should probably be EXECUTION_MODE_IMPLICIT. In the
 build domain of Ant, every Task below a Task will normally be executed.
 The major exception to this is the Target. When a Project Task is
 executed, all Target Tasks do <i>not</i> automatically fire, however all
 Property Tasks <i>do</i> execute.</DL>
<HR>

<A NAME="isPropertyContainer()"><!-- --></A><H3>
isPropertyContainer</H3>
<PRE>
public boolean <B>isPropertyContainer</B>()</PRE>
<DL>
<DD>Determines whether a Task is suitable for holding property values.</DL>
<HR>

<A NAME="getAttributeValue(java.lang.String)"><!-- --></A><H3>
getAttributeValue</H3>
<PRE>
public java.lang.String <B>getAttributeValue</B>(java.lang.String&nbsp;name)</PRE>
<DL>
<DD>Each Task will hold its attributes in some manner. This method will allow
 the Task implementation to return the value of its attribute.</DL>
<HR>

<A NAME="getParent()"><!-- --></A><H3>
getParent</H3>
<PRE>
public <A HREF="../../../../org/apache/ant/tasks/Task.html">Task</A> <B>getParent</B>()</PRE>
<DL>
<DD>Returns this Task's parent Task. If this Task is the root Task, then this
 method will return null.</DL>
<HR>

<A NAME="setParent(org.apache.ant.tasks.Task)"><!-- --></A><H3>
setParent</H3>
<PRE>
public void <B>setParent</B>(<A HREF="../../../../org/apache/ant/tasks/Task.html">Task</A>&nbsp;parent)</PRE>
<DL>
<DD>Sets the Task's parent.</DL>
<HR>

<A NAME="getChildren()"><!-- --></A><H3>
getChildren</H3>
<PRE>
public <A HREF="../../../../org/apache/ant/tasks/Task.html">Task</A>[] <B>getChildren</B>()</PRE>
<DL>
<DD>Returns the an array of Task objects that are subordinate to this Task.</DL>
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