src/main/org/apache/tools/ant/filters/BaseParamFilterReader.java

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 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.
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 * 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.
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
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 */
package org.apache.tools.ant.filters;

import java.io.Reader;

import org.apache.tools.ant.types.Parameter;
import org.apache.tools.ant.types.Parameterizable;

/**
 * Parameterized base class for core filter readers.
 *
 * @author <a href="mailto:umagesh@apache.org">Magesh Umasankar</a>
 */
public abstract class BaseParamFilterReader
    extends BaseFilterReader
    implements Parameterizable {
    /** The passed in parameter array. */
    private Parameter[] parameters;

    /**
     * Constructor for "dummy" instances.
     * 
     * @see BaseFilterReader#BaseFilterReader()
     */
    public BaseParamFilterReader() {
        super();
    }

    /**
     * Creates a new filtered reader.
     *
     * @param in A Reader object providing the underlying stream.
     *           Must not be <code>null</code>.
     */
    public BaseParamFilterReader(final Reader in) {
        super(in);
    }

    /**
     * Sets the parameters used by this filter, and sets
     * the filter to an uninitialized status.
     * 
     * @param parameters The parameters to be used by this filter.
     *                   Should not be <code>null</code>.
     */
    public final void setParameters(final Parameter[] parameters) {
        this.parameters = parameters;
        setInitialized(false);
    }

    /**
     * Returns the parameters to be used by this filter.
     * 
     * @return the parameters to be used by this filter
     */
    protected final Parameter[] getParameters() {
        return parameters;
    }
}