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Ant example source code file (FilterMapper.java)

This example Ant source code file (FilterMapper.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Ant tags/keywords

buildexception, buildexception, chainreaderhelper, chainreaderhelper, filenamemapper, filterchain, filtermapper, io, reader, string, string, stringreader, unsupportedattributeexception, unsupportedattributeexception, util, vector

The FilterMapper.java source code

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

package org.apache.tools.ant.types.mappers;

import java.io.StringReader;
import java.io.Reader;

import java.util.Vector;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.UnsupportedAttributeException;
import org.apache.tools.ant.filters.util.ChainReaderHelper;
import org.apache.tools.ant.types.FilterChain;
import org.apache.tools.ant.util.FileNameMapper;
import org.apache.tools.ant.util.FileUtils;

/**
 * This is a FileNameMapper based on a FilterChain.
 */
public class FilterMapper extends FilterChain implements FileNameMapper {
    /**
     * From attribute not supported.
     * @param from a string
     * @throws BuildException always
     */
    public void setFrom(String from) {
        throw new UnsupportedAttributeException(
            "filtermapper doesn't support the \"from\" attribute.", "from");
    }

    /**
     * From attribute not supported.
     * @param to a string
     * @throws BuildException always
     */
    public void setTo(String to) {
        throw new UnsupportedAttributeException(
            "filtermapper doesn't support the \"to\" attribute.", "to");
    }

    /**
     * Return the result of the filters on the sourcefilename.
     * @param sourceFileName the filename to map
     * @return  a one-element array of converted filenames, or null if
     *          the filterchain returns an empty string.
     */
    public String[] mapFileName(String sourceFileName) {
        try {
            Reader stringReader = new StringReader(sourceFileName);
            ChainReaderHelper helper = new ChainReaderHelper();
            helper.setBufferSize(8192);
            helper.setPrimaryReader(stringReader);
            helper.setProject(getProject());
            Vector filterChains = new Vector();
            filterChains.add(this);
            helper.setFilterChains(filterChains);
            String result = FileUtils.readFully(helper.getAssembledReader());
            if (result.length() == 0) {
                return null;
            } else {
                return new String[] {result};
            }
        } catch (BuildException ex) {
            throw ex;
        } catch (Exception ex) {
            throw new BuildException(ex);
        }
    }
}

Other Ant examples (source code examples)

Here is a short list of links related to this Ant FilterMapper.java source code file:

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