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Ant example source code file (Deltree.java)

This example Ant source code file (Deltree.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, deltree, deprecated, file, file, io, ioexception, string, string, task, the, unable, unable, use

The Deltree.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;

import java.io.File;
import java.io.IOException;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;

/**
 *
 *
 * @since Ant 1.1
 *
 * @deprecated The deltree task is deprecated since Ant 1.2.  Use
 * delete instead.
 */

public class Deltree extends Task {

    private File dir;

    /**
     * Set the directory to be deleted
     *
     * @param dir the root of the tree to be removed.
     */
    public void setDir(File dir) {
        this.dir = dir;
    }

    /**
     * Do the work.
     *
     * @exception BuildException if the task is not configured correctly or
     * the tree cannot be removed.
     */
    public void execute() throws BuildException {
        log("DEPRECATED - The deltree task is deprecated.  "
            + "Use delete instead.");

        if (dir == null) {
            throw new BuildException("dir attribute must be set!", getLocation());
        }

        if (dir.exists()) {
            if (!dir.isDirectory()) {
                if (!dir.delete()) {
                    throw new BuildException("Unable to delete directory "
                                             + dir.getAbsolutePath(),
                                             getLocation());
                }
                return;
            }

            log("Deleting: " + dir.getAbsolutePath());

            try {
                removeDir(dir);
            } catch (IOException ioe) {
                String msg = "Unable to delete " + dir.getAbsolutePath();
                throw new BuildException(msg, getLocation());
            }
        }
    }

    private void removeDir(File dir) throws IOException {

        // check to make sure that the given dir isn't a symlink
        // the comparison of absolute path and canonical path
        // catches this

        //        if (dir.getCanonicalPath().equals(dir.getAbsolutePath())) {
        // (costin) It will not work if /home/costin is symlink to
        // /da0/home/costin ( taz for example )
        String[] list = dir.list();
        for (int i = 0; i < list.length; i++) {
            String s = list[i];
            File f = new File(dir, s);
            if (f.isDirectory()) {
                removeDir(f);
            } else {
                if (!f.delete()) {
                    throw new BuildException("Unable to delete file "
                                             + f.getAbsolutePath());
                }
            }
        }
        if (!dir.delete()) {
            throw new BuildException("Unable to delete directory "
                                     + dir.getAbsolutePath());
        }
    }
}

Other Ant examples (source code examples)

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