Ant example source code file (Attrib.java)

This example Ant source code file (Attrib.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

attr_archive, attr_archive, attr_hidden, attr_readonly, attr_readonly, attr_system, attrib, buildexception, buildexception, fileset, io, set, string, string, unset

The Attrib.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.windows;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.taskdefs.ExecuteOn;
import org.apache.tools.ant.taskdefs.condition.Os;
import org.apache.tools.ant.types.FileSet;

import java.io.File;

/**
 * Attrib equivalent for Win32 environments.
 * Note: Attrib parameters /S and /D are not handled.
 *
 * @since Ant 1.6
 */
public class Attrib extends ExecuteOn {

    private static final String ATTR_READONLY = "R";
    private static final String ATTR_ARCHIVE  = "A";
    private static final String ATTR_SYSTEM   = "S";
    private static final String ATTR_HIDDEN   = "H";
    private static final String SET    = "+";
    private static final String UNSET  = "-";

    private boolean haveAttr = false;

    /** Constructor for Attrib. */
    public Attrib() {
        super.setExecutable("attrib");
        super.setParallel(false);
    }

    /**
     * A file to be attribed.
     * @param src a file
     */
    public void setFile(File src) {
        FileSet fs = new FileSet();
        fs.setFile(src);
        addFileset(fs);
    }

    /**
     * Set the ReadOnly file attribute.
     * @param value a <code>boolean value
     */
    public void setReadonly(boolean value) {
        addArg(value, ATTR_READONLY);
    }

    /**
     * Set the Archive file attribute.
     * @param value a <code>boolean value
     */
    public void setArchive(boolean value) {
        addArg(value, ATTR_ARCHIVE);
    }

    /**
     * Set the System file attribute.
     * @param value a <code>boolean value
     */
    public void setSystem(boolean value) {
        addArg(value, ATTR_SYSTEM);
    }

    /**
     * Set the Hidden file attribute.
     * @param value a <code>boolean value
     */
    public void setHidden(boolean value) {
        addArg(value, ATTR_HIDDEN);
    }

    /**
     * Check the attributes.
     */
    protected void checkConfiguration() {
        if (!haveAttr()) {
            throw new BuildException("Missing attribute parameter",
                                     getLocation());
        }
        super.checkConfiguration();
    }

    /**
     * Set the executable.
     * This is not allowed, and it always throws a BuildException.
     * @param e ignored
     * @ant.attribute ignore="true"
     */
    public void setExecutable(String e) {
        throw new BuildException(getTaskType()
            + " doesn\'t support the executable attribute", getLocation());
    }

    /**
     * Set the executable.
     * This is not allowed, and it always throws a BuildException.
     * @param e ignored
     * @ant.attribute ignore="true"
     */
    public void setCommand(String e) {
        throw new BuildException(getTaskType()
            + " doesn\'t support the command attribute", getLocation());
    }

    /**
     * Add source file.
     * This is not allowed, and it always throws a BuildException.
     * @param b ignored
     * @ant.attribute ignore="true"
     */
    public void setAddsourcefile(boolean b) {
        throw new BuildException(getTaskType()
            + " doesn\'t support the addsourcefile attribute", getLocation());
    }

    /**
     * Set skip empty file sets.
     * This is not allowed, and it always throws a BuildException.
     * @param skip ignored
     * @ant.attribute ignore="true"
     */
    public void setSkipEmptyFilesets(boolean skip) {
        throw new BuildException(getTaskType() + " doesn\'t support the "
                                 + "skipemptyfileset attribute",
                                 getLocation());
    }

    /**
     * Set parallel.
     * This is not allowed, and it always throws a BuildException.
     * @param parallel ignored
     * @ant.attribute ignore="true"
     */
    public void setParallel(boolean parallel) {
        throw new BuildException(getTaskType()
                                 + " doesn\'t support the parallel attribute",
                                 getLocation());
    }

    /**
     * Set max parallel.
     * This is not allowed, and it always throws a BuildException.
     * @param max ignored
     * @ant.attribute ignore="true"
     */
    public void setMaxParallel(int max) {
        throw new BuildException(getTaskType()
                                 + " doesn\'t support the maxparallel attribute",
                                 getLocation());
    }

    /**
     * Check if the os is valid.
     * Always include windows
     * @return true if the os is valid.
     */
    protected boolean isValidOs() {
        return Os.isFamily("windows") && super.isValidOs();
    }

    private static String getSignString(boolean attr) {
        return (attr ? SET : UNSET);
    }

    private void addArg(boolean sign, String attribute) {
        createArg().setValue(getSignString(sign) + attribute);
        haveAttr = true;
    }

    private boolean haveAttr() {
        return haveAttr;
    }

}