/*
* 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.photark.jcr.util;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.compress.archivers.ArchiveException;
import org.apache.commons.compress.archivers.ArchiveInputStream;
import org.apache.commons.compress.archivers.ArchiveStreamFactory;
import org.apache.commons.io.IOUtils;
import org.apache.photark.Image;
public class ArchiveFileExtractor {
private String entryTypes[];
public ArchiveFileExtractor(String[] entryTypes) {
this.entryTypes = entryTypes;
}
public List<Image> extractArchive(InputStream inStream) {
ArchiveStreamFactory streamFactory = new ArchiveStreamFactory();
List<Image> pictures = new ArrayList<Image>();
try {
ArchiveInputStream archiveInputStream = streamFactory.createArchiveInputStream(inStream);
ArchiveEntry entry = null;
while ((entry = archiveInputStream.getNextEntry()) != null) {
if (!entry.isDirectory() && isEntryTypeAllowd(entry)) {
byte buf[] = IOUtils.toByteArray(archiveInputStream);
InputStream inputStream = new ByteArrayInputStream(buf);
Image picture = new Image(entry.getName(), new Date(), inputStream);
pictures.add(picture);
}
}
} catch (ArchiveException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return pictures;
}
/**
* Test whether this stream is of archive type or not
*
* @param inStream InputStream
* @return boolean
*/
public boolean isArchive(InputStream inStream) {
ArchiveStreamFactory streamFactory = new ArchiveStreamFactory();
try {
streamFactory.createArchiveInputStream(inStream);
return true;
} catch (ArchiveException e) {
e.printStackTrace();
}
return false;
}
/**
* Test weather the extension of given entry is allowed or not
*
* @param entry ArchiveEntry
* @return boolean
*/
private boolean isEntryTypeAllowd(ArchiveEntry entry) {
String entryName = entry.getName();
for (String entryType : entryTypes) {
if (entryName.endsWith(entryType))
return true;
}
return false;
}
}