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Ant example source code file (MapperResult.java)

This example Ant source code file (MapperResult.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, filenamemapper, mapperresult, missing, missing, null, null_mapper_result, only, string, string, stringbuffer, stringbuffer, task

The MapperResult.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 org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.types.Mapper;
import org.apache.tools.ant.util.FileNameMapper;

/**
 * This is a test task to show the result of a mapper
 * on a specific input.
 * (Test is not in the name of the class, to make sure that
 * it is not treated as a unit test.
 */

public class MapperResult extends Task {

    private String failMessage = "";
    private String input;
    private String output;
    private FileNameMapper fileNameMapper;

    /**
     * The output on an empty string array
     */
    private static final String NULL_MAPPER_RESULT = "<NULL>";

    public void setFailMessage(String failMessage) {
        this.failMessage = failMessage;
    }
    
    public void setInput(String input) {
        this.input = input;
    }

    public void setOutput(String output) {
        this.output = output;
    }

    public void addConfiguredMapper(Mapper mapper) {
        add(mapper.getImplementation());
    }

    public void add(FileNameMapper fileNameMapper) {
        if (this.fileNameMapper != null) {
            throw new BuildException("Only one mapper type nested element allowed");
        }
        this.fileNameMapper = fileNameMapper;
    }
        
    public void execute() {
        if (input == null) {
            throw new BuildException("Missing attribute 'input'");
        }
        if (output == null) {
            throw new BuildException("Missing attribute 'output'");
        }
        if (fileNameMapper == null) {
            throw new BuildException("Missing a nested file name mapper type element");
        }
        String[] result = fileNameMapper.mapFileName(input);
        String flattened;
        if (result == null) {
            flattened = NULL_MAPPER_RESULT;
        } else {
            StringBuffer b = new StringBuffer();
            for (int i = 0; i < result.length; ++i) {
                if (i != 0) {
                    b.append("|");
                }
                b.append(result[i]);
            }
            flattened = b.toString();
        }
        if (!flattened.equals(output)) {
            throw new BuildException(
                failMessage
                + " "
                + "got "
                + flattened
                + " "
                + "expected "
                + output);
        }
    }
}

Other Ant examples (source code examples)

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

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