Ant example source code file (ZipFileSet.java)

This example Ant source code file (ZipFileSet.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

abstractfileset, abstractfileset, archivefileset, archivescanner, buildexception, fileset, object, object, string, string, zipfileset, zipfileset, zipscanner

The ZipFileSet.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;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;

/**
 * A ZipFileSet is a FileSet with extra attributes useful in the context of
 * Zip/Jar tasks.
 *
 * A ZipFileSet extends FileSets with the ability to extract a subset of the
 * entries of a Zip file for inclusion in another Zip file.  It also includes
 * a prefix attribute which is prepended to each entry in the output Zip file.
 *
 * Since ant 1.6 ZipFileSet can be defined with an id and referenced in packaging tasks
 *
 */
public class ZipFileSet extends ArchiveFileSet {

    private String encoding = null;

    /** Constructor for ZipFileSet */
    public ZipFileSet() {
        super();
    }

    /**
     * Constructor using a fileset arguement.
     * @param fileset the fileset to use
     */
    protected ZipFileSet(FileSet fileset) {
        super(fileset);
    }

    /**
     * Constructor using a zipfileset arguement.
     * @param fileset the zipfileset to use
     */
    protected ZipFileSet(ZipFileSet fileset) {
        super(fileset);
        encoding = fileset.encoding;
    }

    /**
     * Set the encoding used for this ZipFileSet.
     * @param enc encoding as String.
     * @since Ant 1.7
     */
    public void setEncoding(String enc) {
        checkZipFileSetAttributesAllowed();
        this.encoding = enc;
    }

    /**
     * Get the encoding used for this ZipFileSet.
     * @return String encoding.
     * @since Ant 1.7
     */
    public String getEncoding() {
        if (isReference()) {
            AbstractFileSet ref = getRef(getProject());
            if (ref instanceof ZipFileSet) {
                return ((ZipFileSet) ref).getEncoding();
            } else {
                return null;
            }
        }
        return encoding;
    }

    /**
     * Return a new archive scanner based on this one.
     * @return a new ZipScanner with the same encoding as this one.
     */
    protected ArchiveScanner newArchiveScanner() {
        ZipScanner zs = new ZipScanner();
        zs.setEncoding(encoding);
        return zs;
    }

    /**
     * A ZipFileset accepts another ZipFileSet or a FileSet as reference
     * FileSets are often used by the war task for the lib attribute
     * @param p the project to use
     * @return the abstract fileset instance
     */
    protected AbstractFileSet getRef(Project p) {
        dieOnCircularReference(p);
        Object o = getRefid().getReferencedObject(p);
        if (o instanceof ZipFileSet) {
            return (AbstractFileSet) o;
        } else if (o instanceof FileSet) {
            ZipFileSet zfs = new ZipFileSet((FileSet) o);
            configureFileSet(zfs);
            return zfs;
        } else {
            String msg = getRefid().getRefId() + " doesn\'t denote a zipfileset or a fileset";
            throw new BuildException(msg);
        }
    }

    /**
     * Return a ZipFileSet that has the same properties
     * as this one.
     * @return the cloned zipFileSet
     */
    public Object clone() {
        if (isReference()) {
            return ((ZipFileSet) getRef(getProject())).clone();
        } else {
            return super.clone();
        }
    }

    /**
     * A check attributes for zipFileSet.
     * If there is a reference, and
     * it is a ZipFileSet, the zip fileset attributes
     * cannot be used.
     */
    private void checkZipFileSetAttributesAllowed() {
        if (getProject() == null
            || (isReference()
                && (getRefid().getReferencedObject(
                        getProject())
                    instanceof ZipFileSet))) {
            checkAttributesAllowed();
        }
    }

}