Ant example source code file (AntResolver.java)

This example Ant source code file (AntResolver.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

ant, ant, antresolver, buildexception, buildexception, buildfile, extensionresolver, file, file, io, ioexception, must, project, string, string

The AntResolver.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.taskdefs.optional.extension.resolvers;

import java.io.File;
import java.io.IOException;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.Ant;
import org.apache.tools.ant.taskdefs.optional.extension.Extension;
import org.apache.tools.ant.taskdefs.optional.extension.ExtensionResolver;

/**
 * Resolver that just returns s specified location.
 *
 */
public class AntResolver implements ExtensionResolver {
    private File antfile;
    private File destfile;
    private String target;

    /**
     * Sets the ant file
     * @param antfile the ant file to set
     */
    public void setAntfile(final File antfile) {
        this.antfile = antfile;
    }

    /**
     * Sets the destination file
     * @param destfile the destination file
     */
    public void setDestfile(final File destfile) {
        this.destfile = destfile;
    }

    /**
     * Sets the target
     * @param target the target
     */
    public void setTarget(final String target) {
        this.target = target;
    }

    /**
     * Returns the resolved file
     * @param extension the extension
     * @param project the project
     * @return the file resolved
     * @throws BuildException if the file cannot be resolved
     */
    public File resolve(final Extension extension,
                         final Project project) throws BuildException {
        validate();

        final Ant ant = new Ant();
        ant.setProject(project);
        ant.setInheritAll(false);
        ant.setAntfile(antfile.getName());

        try {
            final File dir =
                antfile.getParentFile().getCanonicalFile();
            ant.setDir(dir);
        } catch (final IOException ioe) {
            throw new BuildException(ioe.getMessage(), ioe);
        }

        if (null != target) {
            ant.setTarget(target);
        }

        ant.execute();

        return destfile;
    }

    /*
     * Validates URL
     */
    private void validate() {
        if (null == antfile) {
            final String message = "Must specify Buildfile";
            throw new BuildException(message);
        }

        if (null == destfile) {
            final String message = "Must specify destination file";
            throw new BuildException(message);
        }
    }

    /**
     * Returns a string representation
     * @return the string representation
     */
    public String toString() {
        return "Ant[" + antfile + "==>" + destfile + "]";
    }
}