Ant example source code file (TarScanner.java)

This example Ant source code file (TarScanner.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

archivescanner, buildexception, buildexception, io, ioexception, ioexception, map, map, resource, string, string, tarentry, tarinputstream, tarresource, tarscanner, util

The TarScanner.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 java.io.IOException;
import java.util.Map;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.types.resources.TarResource;
import org.apache.tools.tar.TarEntry;
import org.apache.tools.tar.TarInputStream;

/**
 * Scans tar archives for resources.
 */
public class TarScanner extends ArchiveScanner {

    /**
     * Fills the file and directory maps with resources read from the
     * archive.
     *
     * @param src the archive to scan.
     * @param encoding encoding used to encode file names inside the archive.
     * @param fileEntries Map (name to resource) of non-directory
     * resources found inside the archive.
     * @param matchFileEntries Map (name to resource) of non-directory
     * resources found inside the archive that matched all include
     * patterns and didn't match any exclude patterns.
     * @param dirEntries Map (name to resource) of directory
     * resources found inside the archive.
     * @param matchDirEntries Map (name to resource) of directory
     * resources found inside the archive that matched all include
     * patterns and didn't match any exclude patterns.
     */
    protected void fillMapsFromArchive(Resource src, String encoding,
                                       Map fileEntries, Map matchFileEntries,
                                       Map dirEntries, Map matchDirEntries) {
        TarEntry entry = null;
        TarInputStream ti = null;

        try {
            try {
                ti = new TarInputStream(src.getInputStream());
            } catch (IOException ex) {
                throw new BuildException("problem opening " + srcFile, ex);
            }
            while ((entry = ti.getNextEntry()) != null) {
                Resource r = new TarResource(src, entry);
                String name = entry.getName();
                if (entry.isDirectory()) {
                    name = trimSeparator(name);
                    dirEntries.put(name, r);
                    if (match(name)) {
                        matchDirEntries.put(name, r);
                    }
                } else {
                    fileEntries.put(name, r);
                    if (match(name)) {
                        matchFileEntries.put(name, r);
                    }
                }
            }
        } catch (IOException ex) {
            throw new BuildException("problem reading " + srcFile, ex);
        } finally {
            if (ti != null) {
                try {
                    ti.close();
                } catch (IOException ex) {
                    // swallow
                }
            }
        }
    }
}