CommonsCompressSupport.java
/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.hc.client5.http.entity.compress;
import org.apache.hc.core5.annotation.Contract;
import org.apache.hc.core5.annotation.Internal;
import org.apache.hc.core5.annotation.ThreadingBehavior;
/**
* Utility that answers the question ���Is Apache Commons Compress
* on the class-path and in a usable state?��� Both the encoder and
* decoder registries rely on this information.
*
* @since 5.6
*/
@Internal
@Contract(threading = ThreadingBehavior.STATELESS)
final class CommonsCompressSupport {
private static final String CCSF =
"org.apache.commons.compress.compressors.CompressorStreamFactory";
/** Non-instantiable. */
private CommonsCompressSupport() { }
/**
* Returns {@code true} if the core Commons Compress class can be loaded
* with the current class-loader, {@code false} otherwise.
*/
static boolean isPresent() {
try {
Class.forName(CCSF, false,
CommonsCompressSupport.class.getClassLoader());
return true;
} catch (ClassNotFoundException | LinkageError ex) {
return false;
}
}
}