org.adjective.stout.tools.ClassVerifier.java Source code

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Here is the source code for org.adjective.stout.tools.ClassVerifier.java

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/* ------------------------------------------------------------------------
 * Copyright 2009 Tim Vernum
 * ------------------------------------------------------------------------
 * 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.adjective.stout.tools;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import org.objectweb.asm.ClassReader;
import org.objectweb.asm.tree.ClassNode;
import org.objectweb.asm.tree.MethodNode;
import org.objectweb.asm.tree.analysis.Analyzer;
import org.objectweb.asm.tree.analysis.AnalyzerException;
import org.objectweb.asm.tree.analysis.SimpleVerifier;

/**
 * @author <a href="http://blog.adjective.org/">Tim Vernum</a>
 */
public class ClassVerifier {
    public static void main(String[] args) throws IOException {
        if (args.length != 2) {
            throw new RuntimeException("Usage: <java> " + ClassVerifier.class.getName() + " <class-file> <method>");
        }

        File classFile = new File(args[0]);
        String methodName = args[1];

        if (classFile.isDirectory()) {
            for (File file : classFile.listFiles()) {
                if (file.getName().endsWith(".class")) {
                    System.err.println("-=[ " + file + "]=-");
                    execute(file, methodName);
                }
            }
        } else {
            execute(classFile, methodName);
        }
    }

    @SuppressWarnings("unchecked")
    private static void execute(File classFile, String methodName) throws FileNotFoundException, IOException {
        InputStream input = new FileInputStream(classFile);
        ClassReader reader = new ClassReader(input);
        ClassNode node = new ClassNode();
        reader.accept(node, 0);
        List<MethodNode> methods = node.methods;
        for (MethodNode method : methods) {
            if (method.name.equals(methodName) || "*".equals(methodName)) {
                verify(node.name, method);
            }
        }
    }

    public static void verify(String owner, MethodNode mn) {
        Analyzer a = new Analyzer(new SimpleVerifier());
        try {
            System.err.print("Method " + mn.name + (mn.signature == null ? "" : " " + mn.signature));
            a.analyze(owner, mn);
            System.err.println(" : OK");
        } catch (AnalyzerException e) {
            System.err.println(" : ERROR");
            e.printStackTrace();
        } catch (VerifyError e) {
            System.err.println(" : ERROR");
            e.printStackTrace();
        }
    }

}