/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Ant", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.apache.tools.ant.taskdefs.optional.rjunit;

import java.io.File;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Vector;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

import org.apache.tools.ant.DirectoryScanner;

/**
 * Provide a way to scan entries in a zip file. Note that it extends
 * DirectoryScanner to make use of protected methods but implementation
 * may not be valid for some methods.
 * <p>
 * the setBaseDir() must be called to set the reference to the archive
 * file (.jar or .zip).
 * </p>
 *
 * @author <a href="mailto:sbailliez@apache.org">Stephane Bailliez</a>
 */
public class ZipScanner extends DirectoryScanner {
    public ZipScanner() {
    }

    public void setExcludes(String[] excludes) {
        super.setExcludes(excludes);
        normalize(this.excludes);
    }

    public void setIncludes(String[] includes) {
        super.setIncludes(includes);
        normalize(this.includes);
    }

    /**
     * normalize a set of paths so that it uses / otherwise matching will
     * fail beautifully since archives use / to denote a path.
     */
    protected void normalize(String[] files) {
        if (files != null) {
            for (int i = 0; i < files.length; i++) {
                files[i] = files[i].replace('\\', '/');
            }
        }
    }

    /**
     * Scans the archive for files that match at least one include
     * pattern, and don't match any exclude patterns.
     *
     * @exception IllegalStateException when the zip file was set incorrecly
     */
    public void scan() {
        if (basedir == null) {
            throw new IllegalStateException("No zipfile set");
        }
        if (!basedir.exists()) {
            throw new IllegalStateException("zipfile " + basedir
                    + " does not exist");
        }
        if (basedir.isDirectory()) {
            throw new IllegalStateException("zipfile " + basedir
                    + " is not a file");
        }

        if (includes == null) {
            // No includes supplied, so set it to 'matches all'
            includes = new String[1];
            includes[0] = "**";
        }
        if (excludes == null) {
            excludes = new String[0];
        }

        filesIncluded = new Vector();
        filesNotIncluded = new Vector();
        filesExcluded = new Vector();
        dirsIncluded = new Vector();
        dirsNotIncluded = new Vector();
        dirsExcluded = new Vector();

        if (isIncluded("")) {
            if (!isExcluded("")) {
                dirsIncluded.addElement("");
            } else {
                dirsExcluded.addElement("");
            }
        } else {
            dirsNotIncluded.addElement("");
        }
        scandir(basedir, "", true);
    }

    protected void scandir(File file, String vpath, boolean fast) {
        ZipFile zip = null;
        try {
            zip = new ZipFile(file);
        } catch (IOException e) {
            throw new IllegalStateException(e.getMessage());
        }

        Enumeration entries = zip.entries();
        while (entries.hasMoreElements()) {
            ZipEntry entry = (ZipEntry) entries.nextElement();
            String name = entry.getName();
            // @fixme do we need to strip out entries that starts
            // with . or ./ ?
            if (entry.isDirectory()) {
                if (isIncluded(name)) {
                    if (!isExcluded(name)) {
                        dirsIncluded.addElement(name);
                    } else {
                        everythingIncluded = false;
                        dirsExcluded.addElement(name);
                    }
                } else {
                    everythingIncluded = false;
                    dirsNotIncluded.addElement(name);
                }
            } else {
                if (isIncluded(name)) {
                    if (!isExcluded(name)) {
                        filesIncluded.addElement(name);
                    } else {
                        everythingIncluded = false;
                        filesExcluded.addElement(name);
                    }
                } else {
                    everythingIncluded = false;
                    filesNotIncluded.addElement(name);
                }
            }
        }
    }

}