/*
* Copyright 2009 Google Inc.
*
* 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 com.google.devtools.depan.java.bytecode.eclipse;
import com.google.devtools.depan.filesystem.graph.FileElement;
import com.google.devtools.depan.java.bytecode.impl.ClassDepLister;
import com.google.devtools.depan.model.builder.DependenciesListener;
import org.objectweb.asm.ClassReader;
import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Logger;
/**
* Connect an ASM {@code ClassVisitor} to the bytecode stream.
*
* @author <a href="leeca@google.com">Lee Carver</a>
*/
public class ClassFileReader {
private static final Logger logger =
Logger.getLogger(ClassFileReader.class.getName());
private final ClassAnalysisStats analysisStats;
/**
* Construct a reader, using a common stats counter.
*
* @param packageBuilder
*/
public ClassFileReader(ClassAnalysisStats analysisStats) {
this.analysisStats = analysisStats;
}
/**
* Process a single class file from either the file system or a jar.
*
* @param builder destination of discovered dependencies
* @param fileNode file node associated with the contents
* @param content input stream from .class file.
*/
public void readClassFile(
DependenciesListener builder,
FileElement fileNode,
InputStream content) {
ClassDepLister cd = new ClassDepLister(builder, fileNode);
try {
ClassReader cr = new ClassReader(content);
cr.accept(cd, 0);
analysisStats.incrClassesLoaded();
return;
} catch (IOException ioErr) {
logger.warning(
"Unable to load class information for " + fileNode.getId());
} catch (ArrayIndexOutOfBoundsException bndException) {
logger.info("Unreadable class file for " + fileNode.getId());
}
analysisStats.incrClassesFailed();
}
}