How to create nested element for ant task?

Question

Is it possible to create the nested element for any ant task. For e.g.

<copy todir="../backup/dir"> <fileset dir="src_dir"/> <filterset> <filter token="TITLE" value="Foo Bar"/> </filterset> </copy>

Here for the task copy we are having nested element as filterset. Now, i would like to create my own nested element encryptfilterset for the task copy.

<copy todir="../backup/dir"> <fileset dir="src_dir"/> <encryptfilterset> <filter token="TITLE" value="Foo Bar"/> </encryptfilterset> </copy>

How can we do that?

Rakesh Juyal · Accepted Answer · 2010-09-10 12:09:47Z

we have to extend the existing task to create CustomTask and now to support the custom nested element XYZ create a method in your new class

public XYZ createXYZ();
or
public void addXYZ(XYZ obj)
or
public void addXYZ(XYZ obj)

<taskdef name="CustomTask" classname="com.ant.task.Customtask"> <classpath> <path location="lib/"/> </classpath> </taskdef> <typedef name="XYZ" classname="com.ant.type.XYZ" > <classpath> <path location="lib/"/> </classpath> </typedef> <target name="MyTarget" > <CustomTask> <XYZ></XYZ> </CopyEncrypted> </target>

So my files looked like:-

public class CopyEncrypted extends Copy { public EncryptionAwareFilterSet createEncryptionAwareFilterSet() { EncryptionAwareFilterSet eafilterSet = new EncryptionAwareFilterSet(); getFilterSets().addElement( eafilterSet ); return eafilterSet; } } public class EncryptionAwareFilterSet extends FilterSet{ @Override public synchronized void readFiltersFromFile(File file) throws BuildException { log("EncryptionAwareFilterSet::reading filters",0); super.readFiltersFromFile(file); Vector<Filter> filts = getFilters(); for (Iterator iterator = filts.iterator(); iterator.hasNext();) { Filter filter = (Filter) iterator.next(); if ( filter.getToken().equalsIgnoreCase( "PASSWORD" ) ){ filter.setValue( Encryptor.getEncryptedValue ( filter.getValue() ) ); } } } }

build.xml

<target name="encrypted-copy" > <CopyEncrypted todir="dist/xyz/config" overwrite="true"> <fileset dir="config"/> <encryptionAwareFilterSet> <filtersfile file="conf/properties/blah-blah.properties" /> </encryptionAwareFilterSet> </CopyEncrypted> </target>

M A · Accepted Answer · 2014-07-17 07:39:34Z

You can create your own macrodef

(this is just an example)

<macrodef name="myCopy"> <attribute name="todir" /> <element name="path" /> <sequential> <copy todir="@{todir}"> <path/> </copy> </sequential> </macrodef>

I would play around with macrodef there are a few examples out there

http://ant.apache.org/manual/Tasks/macrodef.html

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