/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Ant", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* .
*/
package ise.antelope.tasks;
import java.util.Vector;
import java.util.Enumeration;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.TaskContainer;
import org.apache.tools.ant.BuildException;
/**
* This task emulates a Java switch.
* @author Dale Anson
*/
public class SwitchTask extends Task {
private Vector cases = new Vector();
private Case defaultCase = null;
private String name = null;
/**
* Register dependent tasks.
*/
public void init() {
getProject().addTaskDefinition( "case", Case.class );
getProject().addTaskDefinition( "default", DefaultCase.class );
getProject().addTaskDefinition( "break", Break.class );
}
/**
* Set the name of the property to switch on.
* @param name the name of the property to switch on.
*/
public void setName( String name ) {
this.name = name;
}
/**
* Adds a case to this switch. A switch can have any number of cases.
* @param c the case to add.
*/
public void addCase( Case c ) {
cases.addElement( c );
}
/**
* Adds a default case to this switch. Only one case may be added.
* @param c the default case.
*/
public void addDefault( DefaultCase c ) {
if ( defaultCase == null ) {
defaultCase = c;
return ;
}
else
throw new BuildException( " can have only one " );
}
public void execute() throws BuildException {
if ( name == null )
throw new BuildException( "'name' attribute cannot be null." );
String value = getProject().getProperty( name );
if ( value == null )
throw new BuildException( "Property " + name + " does not exist." );
boolean disregardValue = false; // should the case fall through to the next?
Enumeration en = cases.elements();
while ( en.hasMoreElements() ) {
Case c = ( Case ) en.nextElement();
if ( disregardValue ) {
c.perform();
if ( c.doBreak() )
return ;
}
else if ( value.equals( c.getValue() ) ) {
c.perform();
if ( c.doBreak() )
return ;
else
disregardValue = true;
}
}
// if here, then do the default case
if ( defaultCase != null ) {
defaultCase.perform();
}
}
}