/*

  * 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.commons.classscan.bcel;

 import java.io.IOException;

 import java.io.InputStream;

 import org.apache.bcel.classfile.ClassParser;

 import org.apache.commons.classscan.MetaClassPathElement;

 import org.apache.commons.classscan.MetaRegistry;

 import org.apache.commons.classscan.spi.ClassDigesterFactory;

 import org.apache.commons.classscan.spi.model.SpiClassDigester;

 import org.apache.commons.classscan.spi.model.SpiMetaClass;

 /**

  * A ClassDigesterFactory that uses BCEL to digest the class bytes

  */

 public class BcelClassDigesterFactory implements ClassDigesterFactory {

     // making digester an instance field ensures that BCEL library is loaded.

     // If load is successful, this factory will produce a usable digester

     private SpiClassDigester spiClassDigester = new SpiClassDigester() {

                 @Override

                 public SpiMetaClass createMetaClass(MetaClassPathElement location, String className, InputStream byteStream) throws IOException {

                         return new BcelClass(location, new ClassParser(byteStream, className));

                 }

         };

         @Override

         public SpiClassDigester createDigester(MetaRegistry metaRegistry) {

                 return spiClassDigester;

         }

 }