src/main/org/apache/tools/ant/types/FilterSetCollection.java

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 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
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 * ====================================================================
 *
 * 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 org.apache.tools.ant.types;

// java io classes
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

// java util classes
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Properties;
import java.util.Vector;

// ant classes
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;

/**
 * A FilterSetCollection is a collection of filtersets each of which may have
 * a different start/end token settings.
 *
 * @author     <A href="mailto:conor@apache.org">Conor MacNeill</A>
 */
public class FilterSetCollection {
    
    private Vector filterSets = new Vector();

    public FilterSetCollection() {
    }
    
    public FilterSetCollection(FilterSet filterSet) {
        addFilterSet(filterSet);
    }
    
    
    public void addFilterSet(FilterSet filterSet) {
        filterSets.addElement(filterSet);
    }
    
    /**
     * Does replacement on the given string with token matching.
     * This uses the defined begintoken and endtoken values which default to @ for both.
     *
     * @param line  The line to process the tokens in.
     * @return      The string with the tokens replaced.
     */
    public String replaceTokens(String line) {
        String replacedLine = line;
        for (Enumeration e = filterSets.elements(); e.hasMoreElements();) {
            FilterSet filterSet = (FilterSet)e.nextElement();
            replacedLine = filterSet.replaceTokens(replacedLine);
        }
        return replacedLine;
    }
    
    /**
    * Test to see if this filter set it empty.
    *
    * @return   Return true if there are filter in this set otherwise false.
    */
    public boolean hasFilters() {
        for (Enumeration e = filterSets.elements(); e.hasMoreElements();) {
            FilterSet filterSet = (FilterSet)e.nextElement();
            if (filterSet.hasFilters()) {
                return true;
            }
        }
        return false;
    }
}