/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* 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.apache.cocoon.components.source.impl;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.cocoon.util.MIMEUtils;
import org.apache.excalibur.source.Source;
import org.apache.excalibur.source.SourceNotFoundException;
import org.apache.excalibur.source.SourceValidity;
/**
* @author <a href="http://apache.org/~reinhard">Reinhard Poetz</a>
* @author <a href="mailto:cziegeler@apache.org">Carsten Ziegeler</a>
* @version CVS $Id: ZipSource.java 30932 2004-07-29 17:35:38Z vgritsenko $
* @since 2.1.4
*/
public class ZipSource extends AbstractLogEnabled implements Source {
Source archive;
String documentName;
public ZipSource(Source archive, String fileName) {
this.archive = archive;
this.documentName = fileName;
}
public boolean exists() {
if(!this.archive.exists()) {
return false;
}
ZipInputStream zipStream = null;
ZipEntry document = null;
boolean found = false;
try {
zipStream = new ZipInputStream(this.archive.getInputStream());
do {
document = zipStream.getNextEntry();
if (document != null) {
if (document.getName().equals(this.documentName)) {
found = true;
} else {
zipStream.closeEntry();
}
}
} while (document != null && found == false);
} catch(IOException ioe) {
return false;
} finally {
try {
zipStream.close();
} catch (IOException ioe) {
this.getLogger().error("Error while closing ZipInputStream: " + this.documentName);
}
}
return found;
}
public InputStream getInputStream()
throws IOException, SourceNotFoundException {
ZipInputStream zipStream =
new ZipInputStream(this.archive.getInputStream());
ZipEntry document = null;
boolean found = false;
do {
document = zipStream.getNextEntry();
if (document != null) {
if (document.getName().equals(this.documentName)) {
found = true;
} else {
// go to next entry
zipStream.closeEntry();
}
}
} while (document != null && found == false);
if (document == null) {
throw new SourceNotFoundException(
"The document "
+ documentName
+ " is not in the archive "
+ this.archive.getURI());
}
// now we will extract the document and write it into a byte array
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[8192];
int length = -1;
while (zipStream.available() > 0) {
length = zipStream.read(buffer, 0, 8192);
if (length > 0) {
baos.write(buffer, 0, length);
}
}
zipStream.close();
baos.flush();
// return an input stream
return new ByteArrayInputStream(baos.toByteArray());
}
public String getURI() {
return this.archive.getURI() + "/" + this.documentName;
}
public String getScheme() {
return ZipSourceFactory.ZIP_SOURCE_SCHEME;
}
public SourceValidity getValidity() {
return this.archive.getValidity();
}
public void refresh() {
}
public String getMimeType() {
String ext = this.documentName.substring( this.documentName.lastIndexOf(".") );
return MIMEUtils.getMIMEType( ext );
}
public long getContentLength() {
return -1;
}
public long getLastModified() {
return this.archive.getLastModified();
}
}