source: other-projects/trunk/realistic-books/packages/AntInstaller/src/org/tp23/antinstaller/selfextract/ResourceExtractor.java@ 19253

/* 
 * Copyright 2005 Paul Hinds
 *
 * Licensed 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.tp23.antinstaller.selfextract;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
/**
 * Copies resources from the Classpath to the filesystem replacing regex with replacement
 * and correcting line endings
 * @author teknopaul
 *
 */
public class ResourceExtractor {
    
    /**
     * @param resource Must start with / e.g. /org/tp23/myFile.txt
     * @param dest
     * @throws IOException 
     */
    public void copyResource(String resource, File dest, String regex, String replace) throws IOException{
        InputStream is = this.getClass().getResourceAsStream(resource);
        if(is == null){
            throw new IOException("Can not find resource: " + resource);
        }
        InputStreamReader isr = new InputStreamReader(is);
        BufferedReader br = new BufferedReader(isr);
        FileOutputStream bos = new FileOutputStream(dest);
        String line = null;
        while((line = br.readLine()) != null){
            bos.write(line.replaceAll(regex, replace).getBytes());
            bos.write(System.getProperty("line.separator").getBytes());
        }
        bos.flush();
        bos.close();
        br.close();
    }
    /**
     * @param resource Must start with / e.g. /org/tp23/myFile.txt
     * @param dest
     * @throws IOException 
     */
    public void copyResourceBinary(String resource, File dest) throws IOException{
        InputStream is = this.getClass().getResourceAsStream(resource);
        if(is == null){
            throw new IOException("Can not find resource: " + resource);
        }
        FileOutputStream bos = new FileOutputStream(dest);
        byte[] buffer = new byte[1024];
        for(int read = 0; (read = is.read(buffer)) > 0; ){
            bos.write(buffer, 0, read);
        }
        bos.flush();
        bos.close();
        is.close();
    }

}