/*
* 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"
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*
* 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
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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
* <http://www.apache.org/>.
*/
package ise.antelope.tasks.condition;

import org.apache.tools.ant.taskdefs.condition.IsTrue;
import org.apache.tools.ant.BuildException;

/**
 * Extends IsTrue to do a String.startsWith().
 * <startswith string="" with=""/>
 * @author Dale Anson
 */
public class StartsWith extends IsTrue {
    
    private String string = null;
    private String propertyName = null;
    private String with = null;
    
    public void setString(String s) {
        this.string = s;   
    }
    
    public void setProperty(String s) {
        String propertyName = s;   
    }
    
    public void setWith(String w) {
        this.with = getProject().replaceProperties(w);   
    }
    
    public boolean eval() throws BuildException {
        if (string == null || propertyName == null)
            throw new BuildException("string or property must be set.");
        if (with == null)
            throw new BuildException("with must be set.");
        
        if (string != null)
            return string.startsWith(with);
        else {
            String propertyValue = getProject().getProperty(propertyName);
            return propertyValue == null ? false : propertyValue.startsWith(with);    
        }
    }

}
