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Groovy: A powerful, dynamic language for the JVM
/*
* 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.
*/
package org.codehaus.groovy.reflection;
import groovy.lang.GroovyRuntimeException;
import groovy.lang.MetaMethod;
import java.lang.reflect.Modifier;
import java.lang.reflect.Constructor;
import java.io.*;
import java.util.*;
public abstract class GeneratedMetaMethod extends MetaMethod {
private final String name;
private final CachedClass declaringClass;
private final Class returnType;
public GeneratedMetaMethod(String name, CachedClass declaringClass, Class returnType, Class[] parameters) {
this.name = name;
this.declaringClass = declaringClass;
this.returnType = returnType;
nativeParamTypes = parameters;
}
public int getModifiers() {
return Modifier.PUBLIC;
}
public String getName() {
return name;
}
public Class getReturnType() {
return returnType;
}
public CachedClass getDeclaringClass() {
return declaringClass;
}
public static class Proxy extends GeneratedMetaMethod {
private volatile MetaMethod proxy;
private final String className;
public Proxy(String className, String name, CachedClass declaringClass, Class returnType, Class[] parameters) {
super(name, declaringClass, returnType, parameters);
this.className = className;
}
@Override
public boolean isValidMethod(Class[] arguments) {
return proxy().isValidMethod(arguments);
}
@Override
public Object doMethodInvoke(Object object, Object[] argumentArray) {
return proxy().doMethodInvoke(object, argumentArray);
}
public Object invoke(Object object, Object[] arguments) {
return proxy().invoke(object, arguments);
}
public final MetaMethod proxy() {
if (proxy == null) {
synchronized(this) {
if (proxy == null) createProxy();
}
}
return proxy;
}
private void createProxy() {
try {
Class aClass = getClass().getClassLoader().loadClass(className.replace('/', '.'));
Constructor constructor = aClass.getConstructor(String.class, CachedClass.class, Class.class, Class[].class);
proxy = (MetaMethod) constructor.newInstance(getName(), getDeclaringClass(), getReturnType(), getNativeParameterTypes());
} catch (Throwable t) {
t.printStackTrace();
throw new GroovyRuntimeException("Failed to create DGM method proxy : " + t, t);
}
}
}
public static class DgmMethodRecord implements Serializable {
public String className;
public String methodName;
public Class returnType;
public Class[] parameters;
private static final Class[] PRIMITIVE_CLASSES = {
Boolean.TYPE, Character.TYPE, Byte.TYPE, Short.TYPE,
Integer.TYPE, Long.TYPE, Double.TYPE, Float.TYPE, Void.TYPE,
boolean[].class, char[].class, byte[].class, short[].class,
int[].class, long[].class, double[].class, float[].class,
Object[].class, String[].class, Class[].class, Byte[].class, CharSequence[].class,
};
public static void saveDgmInfo(List records, String file) throws IOException {
DataOutputStream out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(file)));
Map classes = new LinkedHashMap();
int nextClassId = 0;
for (Class primitive : PRIMITIVE_CLASSES) {
classes.put(primitive.getName(), nextClassId++);
}
for (DgmMethodRecord record : records) {
String name = record.returnType.getName();
Integer id = classes.get(name);
if (id == null) {
id = nextClassId++;
classes.put(name, id);
}
for (int i = 0; i < record.parameters.length; i++) {
name = record.parameters[i].getName();
id = classes.get(name);
if (id == null) {
id = nextClassId++;
classes.put(name, id);
}
}
}
for (Map.Entry stringIntegerEntry : classes.entrySet()) {
out.writeUTF(stringIntegerEntry.getKey());
out.writeInt(stringIntegerEntry.getValue());
}
out.writeUTF("");
out.writeInt(records.size());
for (DgmMethodRecord record : records) {
out.writeUTF(record.className);
out.writeUTF(record.methodName);
out.writeInt(classes.get(record.returnType.getName()));
out.writeInt(record.parameters.length);
for (int i = 0; i < record.parameters.length; i++) {
Integer key = classes.get(record.parameters[i].getName());
out.writeInt(key);
}
}
out.close();
}
public static List loadDgmInfo() throws IOException {
ClassLoader loader = DgmMethodRecord.class.getClassLoader();
DataInputStream in = new DataInputStream(new BufferedInputStream(loader.getResourceAsStream("META-INF/dgminfo")));
Map classes = new HashMap();
for (int i = 0; i < PRIMITIVE_CLASSES.length; i++) {
classes.put(i, PRIMITIVE_CLASSES[i]);
}
int skip = 0;
for (; ; ) {
String name = in.readUTF();
if (name.length() == 0)
break;
int key = in.readInt();
if (skip++ < PRIMITIVE_CLASSES.length)
continue;
Class cls = null;
try {
cls = loader.loadClass(name);
} catch (ClassNotFoundException e) {
// under certain restrictive environments, loading certain classes may be forbidden
// and could yield a ClassNotFoundException (Google App Engine)
continue;
}
classes.put(key, cls);
}
int size = in.readInt();
List res = new ArrayList(size);
for (int i = 0; i != size; ++i) {
boolean skipRecord = false;
DgmMethodRecord record = new DgmMethodRecord();
record.className = in.readUTF();
record.methodName = in.readUTF();
record.returnType = classes.get(in.readInt());
if (record.returnType == null) {
skipRecord = true;
}
int psize = in.readInt();
record.parameters = new Class[psize];
for (int j = 0; j < record.parameters.length; j++) {
record.parameters[j] = classes.get(in.readInt());
if (record.parameters[j] == null) {
skipRecord = true;
}
}
if (!skipRecord) {
res.add(record);
}
}
in.close();
return res;
}
}
}