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// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
package jodd.proxetta.asm;
import jodd.asm.AsmUtil;
import jodd.asm.EmptyClassVisitor;
import jodd.asm.EmptyMethodVisitor;
import jodd.asm7.AnnotationVisitor;
import jodd.asm7.ClassReader;
import jodd.asm7.MethodVisitor;
import jodd.asm7.signature.SignatureReader;
import jodd.io.StreamUtil;
import jodd.proxetta.AnnotationInfo;
import jodd.proxetta.ClassInfo;
import jodd.proxetta.GenericsReader;
import jodd.proxetta.ProxettaException;
import jodd.util.ClassLoaderUtil;
import jodd.util.StringPool;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import static jodd.proxetta.asm.ProxettaAsmUtil.CLINIT;
import static jodd.proxetta.asm.ProxettaAsmUtil.INIT;
/**
* Reads info from target class.
*/
@SuppressWarnings({"AnonymousClassVariableHidesContainingMethodVariable"})
public class TargetClassInfoReader extends EmptyClassVisitor implements ClassInfo {
//protected ClassInfo classInfo;
protected final Map methodSignatures;
protected final List superClassReaders; // list of all super class readers
protected final Set allMethodSignatures;
protected final ClassLoader classLoader;
public TargetClassInfoReader(final ClassLoader classLoader) {
this.methodSignatures = new HashMap<>();
this.superClassReaders = new ArrayList<>();
this.allMethodSignatures = new HashSet<>();
this.classLoader = classLoader;
}
// ---------------------------------------------------------------- some getters
/**
* Returns method signature for some method. If signature is not found, returns null.
* Founded signatures means that those method can be proxyfied.
*/
public MethodSignatureVisitor lookupMethodSignatureVisitor(final int access, final String name, final String desc, final String className) {
String key = ProxettaAsmUtil.createMethodSignaturesKey(access, name, desc, className);
return methodSignatures.get(key);
}
// ---------------------------------------------------------------- information
protected String targetPackage;
protected String targetClassname;
protected String superName;
protected String thisReference;
protected String nextSupername;
protected String[] superClasses;
protected AnnotationInfo[] annotations;
protected List classAnnotations;
protected boolean isTargetInterface;
protected Set nextInterfaces;
protected Map generics;
// ---------------------------------------------------------------- class interface
@Override
public String getPackage() {
return targetPackage;
}
@Override
public String getClassname() {
return targetClassname;
}
@Override
public String getSuperName() {
return superName;
}
@Override
public String getReference() {
return thisReference;
}
@Override
public String[] getSuperClasses() {
return superClasses;
}
@Override
public AnnotationInfo[] getAnnotations() {
return annotations;
}
// @Override
// public Map getGenerics() {
// return generics;
// }
// ---------------------------------------------------------------- visits
@Override
public void visit(final int version, final int access, final String name, final String signature, final String superName, final String[] interfaces) {
final int lastSlash = name.lastIndexOf('/');
this.thisReference = name;
this.superName = superName;
this.nextSupername = superName;
this.targetPackage = lastSlash == -1 ? StringPool.EMPTY : name.substring(0, lastSlash).replace('/', '.');
this.targetClassname = name.substring(lastSlash + 1);
this.isTargetInterface = (access & AsmUtil.ACC_INTERFACE) != 0;
if (this.isTargetInterface) {
nextInterfaces = new HashSet<>();
if (interfaces != null) {
Collections.addAll(nextInterfaces, interfaces);
}
}
generics = new GenericsReader().parseSignatureForGenerics(signature, isTargetInterface);
}
@Override
public AnnotationVisitor visitAnnotation(final String desc, final boolean visible) {
AnnotationReader ar = new AnnotationReader(desc, visible);
if (classAnnotations == null) {
classAnnotations = new ArrayList<>();
}
classAnnotations.add(ar);
return ar;
}
/**
* Stores method signature for target method.
*/
@Override
public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature, final String[] exceptions) {
// if ((access & AsmUtil.ACC_FINAL) != 0) {
// return null; // skip finals
// }
MethodSignatureVisitor msign = createMethodSignature(access, name, desc, signature, exceptions, thisReference, this.generics);
String key = ProxettaAsmUtil.createMethodSignaturesKey(access, name, desc, thisReference);
methodSignatures.put(key, msign);
allMethodSignatures.add(msign.getCleanSignature());
return new MethodAnnotationReader(msign);
}
/**
* Stores signatures for all super public methods not already overridden by target class.
* All this methods will be accepted for proxyfication.
*/
@Override
public void visitEnd() {
// prepare class annotations
if (classAnnotations != null) {
annotations = classAnnotations.toArray(new AnnotationInfo[0]);
classAnnotations = null;
}
List superList = new ArrayList<>();
Set allInterfaces = new HashSet<>();
if (nextInterfaces != null) {
allInterfaces.addAll(nextInterfaces);
}
// check all public super methods that are not overridden in superclass
while (nextSupername != null) {
InputStream inputStream = null;
ClassReader cr;
try {
inputStream = ClassLoaderUtil.getClassAsStream(nextSupername, classLoader);
cr = new ClassReader(inputStream);
} catch (IOException ioex) {
throw new ProxettaException("Unable to inspect super class: " + nextSupername, ioex);
} finally {
StreamUtil.close(inputStream);
}
superList.add(nextSupername);
superClassReaders.add(cr); // remember the super class reader
cr.accept(new SuperClassVisitor(), 0);
if (cr.getInterfaces() != null) {
Collections.addAll(allInterfaces, cr.getInterfaces());
}
}
superClasses = superList.toArray(new String[0]);
// check all interface methods that are not overridden in super-interface
Set todoInterfaces = new HashSet<>(allInterfaces);
Set newCollectedInterfaces = new HashSet<>();
while (true) {
for (String next : todoInterfaces) {
InputStream inputStream = null;
ClassReader cr;
try {
inputStream = ClassLoaderUtil.getClassAsStream(next, classLoader);
cr = new ClassReader(inputStream);
}
catch (IOException ioex) {
throw new ProxettaException("Unable to inspect super interface: " + next, ioex);
}
finally {
StreamUtil.close(inputStream);
}
superClassReaders.add(cr); // remember the super class reader
cr.accept(new SuperClassVisitor(), 0);
if (cr.getInterfaces() != null) {
for (String newInterface : cr.getInterfaces()) {
if (!allInterfaces.contains(newInterface) && !todoInterfaces.contains(newInterface)) {
// new interface found
newCollectedInterfaces.add(newInterface);
}
}
}
}
// perform collection
allInterfaces.addAll(todoInterfaces);
if (newCollectedInterfaces.isEmpty()) {
// no new interface found
break;
}
todoInterfaces.clear();
todoInterfaces.addAll(newCollectedInterfaces);
newCollectedInterfaces.clear();
}
}
/**
* Creates method signature from method name.
*/
protected MethodSignatureVisitor createMethodSignature(
final int access,
final String methodName,
final String description,
final String signature,
final String[] exceptions,
final String classname,
final Map declaredTypeGenerics) {
MethodSignatureVisitor v = new MethodSignatureVisitor(methodName, access, classname, description, exceptions, signature, declaredTypeGenerics, this);
new SignatureReader(signature != null ? signature : description).accept(v);
return v;
}
// ---------------------------------------------------------------- util class
/**
* Reads method annotations and stores to method info.
*/
static class MethodAnnotationReader extends EmptyMethodVisitor {
final List methodAnns = new ArrayList<>();
final List[] methodParamsAnns;
final MethodSignatureVisitor msign;
MethodAnnotationReader(final MethodSignatureVisitor msign) {
this.msign = msign;
this.methodParamsAnns = new ArrayList[msign.getAllArgumentsSize()];
}
@Override
public AnnotationVisitor visitAnnotation(final String desc, final boolean visible) {
AnnotationReader ar = new AnnotationReader(desc, visible);
methodAnns.add(ar);
return ar;
}
@Override
public AnnotationVisitor visitParameterAnnotation(final int parameter, final String desc, final boolean visible) {
AnnotationReader ar = new AnnotationReader(desc, visible);
if (methodParamsAnns[parameter] == null) {
methodParamsAnns[parameter] = new ArrayList<>();
}
methodParamsAnns[parameter].add(ar);
return ar;
}
@Override
public void visitEnd() {
if (!methodAnns.isEmpty()) {
// method annotations
msign.annotations = methodAnns.toArray(new AnnotationInfo[0]);
}
// arguments annotations
for (int i = 0; i < methodParamsAnns.length; i++) {
List methodParamsAnn = methodParamsAnns[i];
if (methodParamsAnn != null) {
msign.getArgument(i + 1).annotations = methodParamsAnn.toArray(new AnnotationInfo[0]);
}
}
}
}
// ---------------------------------------------------------------- super class visitor
private class SuperClassVisitor extends EmptyClassVisitor {
String declaredClassName;
Map superGeneric;
@Override
public void visit(final int version, final int access, final String name, final String signature, final String superName, final String[] interfaces) {
nextSupername = superName;
declaredClassName = name;
// append inner interfaces
if (nextInterfaces != null) {
if (interfaces != null) {
Collections.addAll(nextInterfaces, interfaces);
}
}
final boolean isInterface = (access & AsmUtil.ACC_INTERFACE) != 0;
this.superGeneric = new GenericsReader().parseSignatureForGenerics(signature, isInterface);
}
@Override
public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature, final String[] exceptions) {
if (name.equals(INIT) || name.equals(CLINIT)) {
return null;
}
if ((access & AsmUtil.ACC_PUBLIC) == 0) { // skip non-public
return null;
}
if ((access & AsmUtil.ACC_FINAL) != 0) { // skip finals
return null;
}
MethodSignatureVisitor msign = createMethodSignature(access, name, desc, signature, exceptions, thisReference, this.superGeneric);
if (allMethodSignatures.contains(msign.getCleanSignature())) { // skip overridden method by some in above classes
return null;
}
msign.setDeclaredClassName(declaredClassName); // indicates it is not a top level class
String key = ProxettaAsmUtil.createMethodSignaturesKey(access, name, desc, declaredClassName);
methodSignatures.put(key, msign);
allMethodSignatures.add(msign.getCleanSignature());
return new MethodAnnotationReader(msign);
}
}
// ---------------------------------------------------------------- toString
@Override
public String toString() {
return "target: " + this.targetPackage + '.' + this.targetClassname;
}
}