package org.apache.maven.index.util.zip;
/*
* 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.
*/
import java.io.File;
import java.io.IOException;
public class ZipFacade
{
public static final long MEGABYTE = 1048576L;
public static final long JAVA_ZIPFILE_SIZE_THRESHOLD = Long.getLong(
"org.apache.maven.index.util.zip.ZipFacade.javaZipFileSizeThreshold", 100L * MEGABYTE );
private static final boolean TRUEZIP_AVAILABLE;
static
{
Class<?> clazz;
try
{
clazz = Class.forName( "de.schlichtherle.truezip.zip.ZipFile" );
}
catch ( ClassNotFoundException e )
{
clazz = null;
}
TRUEZIP_AVAILABLE = clazz != null;
}
public static ZipHandle getZipHandle( File targetFile )
throws IOException
{
if ( targetFile.isFile() )
{
if ( TRUEZIP_AVAILABLE && targetFile.length() > JAVA_ZIPFILE_SIZE_THRESHOLD )
{
return new TrueZipZipFileHandle( targetFile );
}
else
{
return new JavaZipFileHandle( targetFile );
}
}
throw new IOException( "The targetFile should point to an existing ZIP file:" + targetFile );
}
public static void close( ZipHandle handle )
throws IOException
{
if ( handle != null )
{
handle.close();
}
}
}