// Copyright 2011 The Apache Software Foundation
//
// 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.tapestry5.internal.services;
import org.apache.tapestry5.internal.plastic.PlasticInternalUtils;
import org.apache.tapestry5.internal.plastic.asm.ClassWriter;
import org.apache.tapestry5.internal.plastic.asm.MethodVisitor;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.UUID;
import static org.apache.tapestry5.internal.plastic.asm.Opcodes.*;
public class ClassCreationHelper
{
public final String tempDir;
public ClassCreationHelper()
{
this(String.format("%s/tapestry-test-classpath/%s",
System.getProperty("java.io.tmpdir"),
UUID.randomUUID().toString()));
}
public ClassCreationHelper(String tempDir)
{
this.tempDir = tempDir;
}
public void writeFile(ClassWriter writer, String className) throws Exception
{
File classFile = toFile(className);
classFile.getParentFile().mkdirs();
OutputStream os = new BufferedOutputStream(new FileOutputStream(classFile));
os.write(writer.toByteArray());
os.close();
}
public ClassWriter createWriter(String className, String superClassName, String... interfaceNames)
{
String[] interfaceInternalNames = new String[interfaceNames.length];
for (int i = 0; i < interfaceNames.length; i++)
{
interfaceInternalNames[i] = PlasticInternalUtils.toInternalName(interfaceNames[i]);
}
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES + ClassWriter.COMPUTE_MAXS);
cw.visit(V1_5, ACC_PUBLIC, PlasticInternalUtils.toInternalName(className), null,
PlasticInternalUtils.toInternalName(superClassName), interfaceInternalNames);
return cw;
}
public void implementPublicConstructor(ClassWriter cw, String superClassName)
{
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, PlasticInternalUtils.toInternalName(superClassName), "<init>", "()V");
mv.visitInsn(RETURN);
mv.visitEnd();
}
public long readDTM(String className) throws Exception
{
URL url = toFile(className).toURL();
return readDTM(url);
}
private File toFile(String className)
{
String path = String.format("%s/%s.class",
tempDir,
PlasticInternalUtils.toInternalName(className));
return new File(path);
}
private long readDTM(URL url) throws Exception
{
URLConnection connection = url.openConnection();
connection.connect();
return connection.getLastModified();
}
}