/*
* Copyright (c) 2010, Rickard Öberg. All Rights Reserved.
*
* 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.qi4j.runtime.composite;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.qi4j.api.entity.Lifecycle;
import org.qi4j.api.mixin.Initializable;
import org.qi4j.api.util.Classes;
import org.qi4j.api.util.Methods;
import org.qi4j.functional.Iterables;
import static org.objectweb.asm.Opcodes.AASTORE;
import static org.objectweb.asm.Opcodes.ACC_PRIVATE;
import static org.objectweb.asm.Opcodes.ACC_PUBLIC;
import static org.objectweb.asm.Opcodes.ACC_STATIC;
import static org.objectweb.asm.Opcodes.ACC_SUPER;
import static org.objectweb.asm.Opcodes.ACONST_NULL;
import static org.objectweb.asm.Opcodes.ALOAD;
import static org.objectweb.asm.Opcodes.ANEWARRAY;
import static org.objectweb.asm.Opcodes.ARETURN;
import static org.objectweb.asm.Opcodes.ASTORE;
import static org.objectweb.asm.Opcodes.ATHROW;
import static org.objectweb.asm.Opcodes.BIPUSH;
import static org.objectweb.asm.Opcodes.CHECKCAST;
import static org.objectweb.asm.Opcodes.DLOAD;
import static org.objectweb.asm.Opcodes.DRETURN;
import static org.objectweb.asm.Opcodes.DUP;
import static org.objectweb.asm.Opcodes.FLOAD;
import static org.objectweb.asm.Opcodes.FRETURN;
import static org.objectweb.asm.Opcodes.GETFIELD;
import static org.objectweb.asm.Opcodes.GETSTATIC;
import static org.objectweb.asm.Opcodes.GOTO;
import static org.objectweb.asm.Opcodes.ICONST_0;
import static org.objectweb.asm.Opcodes.ICONST_1;
import static org.objectweb.asm.Opcodes.ICONST_2;
import static org.objectweb.asm.Opcodes.ICONST_3;
import static org.objectweb.asm.Opcodes.ICONST_4;
import static org.objectweb.asm.Opcodes.ICONST_5;
import static org.objectweb.asm.Opcodes.ILOAD;
import static org.objectweb.asm.Opcodes.INVOKEINTERFACE;
import static org.objectweb.asm.Opcodes.INVOKESPECIAL;
import static org.objectweb.asm.Opcodes.INVOKESTATIC;
import static org.objectweb.asm.Opcodes.INVOKEVIRTUAL;
import static org.objectweb.asm.Opcodes.IRETURN;
import static org.objectweb.asm.Opcodes.LLOAD;
import static org.objectweb.asm.Opcodes.LRETURN;
import static org.objectweb.asm.Opcodes.POP;
import static org.objectweb.asm.Opcodes.PUTSTATIC;
import static org.objectweb.asm.Opcodes.RETURN;
import static org.objectweb.asm.Type.getInternalName;
import static org.qi4j.api.util.Classes.interfacesOf;
/**
* Generate subclasses of mixins/modifiers that implement all interfaces not in the class itself
* and which delegates those calls to a given composite invoker.
*/
@SuppressWarnings( "raw" )
public class FragmentClassLoader
extends ClassLoader
{
private static final int JDK_VERSION;
public static final String GENERATED_POSTFIX = "_Stub";
static
{
String jdkString = System.getProperty( "java.specification.version" );
switch( jdkString )
{
case "1.8":
JDK_VERSION = Opcodes.V1_8;
break;
case "1.7":
default:
JDK_VERSION = Opcodes.V1_7;
break;
}
}
public FragmentClassLoader( ClassLoader parent )
{
super( parent );
}
@Override
protected Class findClass( String name )
throws ClassNotFoundException
{
if( name.endsWith( GENERATED_POSTFIX ) )
{
Class baseClass;
String baseName = name.substring( 0, name.length() - 5 );
try
{
baseClass = loadClass( baseName );
}
catch( ClassNotFoundException e )
{
// Try replacing the last _ with $
while( true )
{
int idx = baseName.lastIndexOf( "_" );
if( idx != -1 )
{
baseName = baseName.substring( 0, idx ) + "$" + baseName.substring( idx + 1 );
try
{
baseClass = loadClass( baseName );
break;
}
catch( ClassNotFoundException e1 )
{
// Try again
}
}
else
{
throw e;
}
}
}
// To Allow JDK classes to be composed.
if( name.startsWith( "java." ))
name = "qi4j." + name;
byte[] b = generateClass( name, baseClass );
return defineClass( name, b, 0, b.length, baseClass.getProtectionDomain() );
}
// Try the classloader of this classloader -> get classes in Qi4j such as CompositeInvoker
return getClass().getClassLoader().loadClass( name );
}
public static byte[] generateClass( String name, Class baseClass )
throws ClassNotFoundException
{
String classSlash = name.replace( '.', '/' );
String baseClassSlash = getInternalName( baseClass );
ClassWriter cw = new ClassWriter( ClassWriter.COMPUTE_MAXS );
// Class definition start
cw.visit( JDK_VERSION, ACC_PUBLIC + ACC_SUPER, classSlash, null, baseClassSlash, null );
// Composite reference
{
cw.visitField( ACC_PUBLIC, "_instance", "Lorg/qi4j/api/composite/CompositeInvoker;", null, null ).visitEnd();
}
// Static Method references
boolean hasProxyMethods = false;
{
int idx = 1;
for( Method method : baseClass.getMethods() )
{
if( isOverridden(method, baseClass) )
{
cw.visitField( ACC_PRIVATE + ACC_STATIC, "m" + idx++, "Ljava/lang/reflect/Method;", null,
null ).visitEnd();
hasProxyMethods = true;
}
}
}
// Constructors
for( Constructor constructor : baseClass.getDeclaredConstructors() )
{
if( Modifier.isPublic( constructor.getModifiers() ) || Modifier.isProtected( constructor.getModifiers() ) )
{
String desc = org.objectweb.asm.commons.Method.getMethod( constructor ).getDescriptor();
MethodVisitor cmv = cw.visitMethod( ACC_PUBLIC, "<init>", desc, null, null );
cmv.visitCode();
cmv.visitVarInsn(ALOAD, 0);
int idx = 1;
for( Class aClass : constructor.getParameterTypes() )
{
final int opcode;
if (aClass.equals(Integer.TYPE)) {
opcode = ILOAD;
} else if (aClass.equals(Long.TYPE)) {
opcode = LLOAD;
} else if (aClass.equals(Float.TYPE)) {
opcode = FLOAD;
} else if (aClass.equals(Double.TYPE)) {
opcode = DLOAD;
} else {
opcode = ALOAD;
}
cmv.visitVarInsn(opcode, idx++);
}
cmv.visitMethodInsn(INVOKESPECIAL, baseClassSlash, "<init>", desc);
cmv.visitInsn(RETURN);
cmv.visitMaxs(idx, idx);
cmv.visitEnd();
}
}
// Overloaded and unimplemented methods
if( hasProxyMethods )
{
Method[] methods = baseClass.getMethods();
int idx = 0;
List<Label> exceptionLabels = new ArrayList<>();
for( Method method : methods )
{
if( isOverridden(method, baseClass) )
{
idx++;
String methodName = method.getName();
String desc = org.objectweb.asm.commons.Method.getMethod( method ).getDescriptor();
String[] exceptions = null;
{
MethodVisitor mv = cw.visitMethod( ACC_PUBLIC, methodName, desc, null, null );
if( isInternalQi4jMethod( method, baseClass ) )
{
// generate a NoOp method...
mv.visitInsn( RETURN );
}
else
{
Label endLabel = null; // Use this if return type is void
if( method.getExceptionTypes().length > 0 )
{
exceptions = new String[ method.getExceptionTypes().length ];
for( int i = 0; i < method.getExceptionTypes().length; i++ )
{
Class<?> aClass = method.getExceptionTypes()[ i ];
exceptions[ i ] = getInternalName( aClass );
}
}
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
exceptionLabels.clear();
for( Class<?> declaredException : method.getExceptionTypes() )
{
Label ld = new Label();
mv.visitTryCatchBlock( l0, l1, ld, getInternalName( declaredException ) );
exceptionLabels.add( ld ); // Reuse this further down for the catch
}
Label lruntime = new Label();
mv.visitTryCatchBlock( l0, l1, lruntime, "java/lang/RuntimeException" );
Label lerror = new Label();
mv.visitTryCatchBlock( l0, l1, lerror, "java/lang/Throwable" );
mv.visitLabel( l0 );
mv.visitVarInsn( ALOAD, 0 );
mv.visitFieldInsn( GETFIELD, classSlash, "_instance",
"Lorg/qi4j/api/composite/CompositeInvoker;" );
mv.visitFieldInsn( GETSTATIC, classSlash, "m" + idx, "Ljava/lang/reflect/Method;" );
int paramCount = method.getParameterTypes().length;
int stackIdx = 0;
if( paramCount == 0 )
{
// Send in null as parameter
mv.visitInsn( ACONST_NULL );
}
else
{
insn( mv, paramCount );
mv.visitTypeInsn( ANEWARRAY, "java/lang/Object" );
int pidx = 0;
for( Class<?> aClass : method.getParameterTypes() )
{
mv.visitInsn( DUP );
insn( mv, pidx++ );
stackIdx = wrapParameter( mv, aClass, stackIdx + 1 );
mv.visitInsn( AASTORE );
}
}
// Call method
mv.visitMethodInsn( INVOKEINTERFACE, "org/qi4j/api/composite/CompositeInvoker",
"invokeComposite",
"(Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;" );
// Return value
if( !method.getReturnType().equals( Void.TYPE ) )
{
unwrapResult( mv, method.getReturnType(), l1 );
}
else
{
mv.visitInsn( POP );
mv.visitLabel( l1 );
endLabel = new Label();
mv.visitJumpInsn( GOTO, endLabel );
}
// Increase stack to beyond method args
stackIdx++;
// Declared exceptions
int exceptionIdx = 0;
for( Class<?> aClass : method.getExceptionTypes() )
{
mv.visitLabel( exceptionLabels.get( exceptionIdx++ ) );
mv.visitFrame( Opcodes.F_SAME1, 0, null, 1, new Object[]{ getInternalName( aClass ) } );
mv.visitVarInsn( ASTORE, stackIdx );
mv.visitVarInsn( ALOAD, stackIdx );
mv.visitInsn( ATHROW );
}
// RuntimeException and Error catch-all
mv.visitLabel( lruntime );
mv.visitFrame( Opcodes.F_SAME1, 0, null, 1, new Object[]{ "java/lang/RuntimeException" } );
mv.visitVarInsn( ASTORE, stackIdx );
mv.visitVarInsn( ALOAD, stackIdx );
mv.visitInsn( ATHROW );
mv.visitLabel( lerror );
mv.visitFrame( Opcodes.F_SAME1, 0, null, 1, new Object[]{ "java/lang/Throwable" } );
mv.visitVarInsn( ASTORE, stackIdx );
mv.visitVarInsn( ALOAD, stackIdx );
mv.visitTypeInsn( CHECKCAST, "java/lang/Error" );
mv.visitInsn( ATHROW );
// Return type = void
if( endLabel != null )
{
mv.visitLabel( endLabel );
mv.visitFrame( Opcodes.F_SAME, 0, null, 0, null );
mv.visitInsn( RETURN );
}
mv.visitMaxs( 0, 0 );
mv.visitEnd();
}
}
if( !Modifier.isAbstract( method.getModifiers() ) )
{
// Add method with _ as prefix
MethodVisitor mv;
mv = cw.visitMethod( ACC_PUBLIC, "_" + method.getName(), desc, null, exceptions );
mv.visitCode();
mv.visitVarInsn( ALOAD, 0 );
// Parameters
int stackIdx = 1;
for( Class<?> aClass : method.getParameterTypes() )
{
stackIdx = loadParameter( mv, aClass, stackIdx ) + 1;
}
// Call method
mv.visitMethodInsn( INVOKESPECIAL, baseClassSlash, method.getName(), desc );
// Return value
if( !method.getReturnType().equals( Void.TYPE ) )
{
returnResult( mv, method.getReturnType() );
}
else
{
mv.visitInsn( RETURN );
}
mv.visitMaxs( 1, 1 );
mv.visitEnd();
}
}
}
// Class initializer
{
MethodVisitor mv;
mv = cw.visitMethod( ACC_STATIC, "<clinit>", "()V", null, null );
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock( l0, l1, l2, "java/lang/NoSuchMethodException" );
mv.visitLabel( l0 );
// Lookup methods and store in static variables
int midx = 0;
for( Method method : methods )
{
if( isOverridden(method, baseClass) )
{
method.setAccessible( true );
Class methodClass;
if( Modifier.isAbstract( method.getModifiers() ) )
{
methodClass = method.getDeclaringClass();
}
else
{
try
{
methodClass = getInterfaceMethodDeclaration( method,
baseClass ); // Overridden method lookup
}
catch( NoSuchMethodException e )
{
throw new ClassNotFoundException( name, e );
}
}
midx++;
mv.visitLdcInsn( Type.getType( methodClass ) );
mv.visitLdcInsn( method.getName() );
insn( mv, method.getParameterTypes().length );
mv.visitTypeInsn( ANEWARRAY, "java/lang/Class" );
int pidx = 0;
for( Class<?> aClass : method.getParameterTypes() )
{
mv.visitInsn( DUP );
insn( mv, pidx++ );
type( mv, aClass );
mv.visitInsn( AASTORE );
}
mv.visitMethodInsn( INVOKEVIRTUAL, "java/lang/Class", "getMethod",
"(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;" );
mv.visitFieldInsn( PUTSTATIC, classSlash, "m" + midx, "Ljava/lang/reflect/Method;" );
}
}
mv.visitLabel( l1 );
Label l3 = new Label();
mv.visitJumpInsn( GOTO, l3 );
mv.visitLabel( l2 );
mv.visitFrame( Opcodes.F_SAME1, 0, null, 1, new Object[]{ "java/lang/NoSuchMethodException" } );
mv.visitVarInsn( ASTORE, 0 );
mv.visitVarInsn( ALOAD, 0 );
mv.visitMethodInsn( INVOKEVIRTUAL, "java/lang/NoSuchMethodException", "printStackTrace", "()V" );
mv.visitLabel( l3 );
mv.visitFrame( Opcodes.F_SAME, 0, null, 0, null );
mv.visitInsn( RETURN );
mv.visitMaxs( 6, 1 );
mv.visitEnd();
}
}
cw.visitEnd();
return cw.toByteArray();
}
private static boolean isOverridden(Method method, Class baseClass)
{
if( Modifier.isAbstract( method.getModifiers() ) )
{
return true; // Implement all abstract methods
}
if( Modifier.isFinal( method.getModifiers() ) )
{
return false; // Cannot override final methods
}
if( isInterfaceMethod( method, baseClass ) )
{
// if() used for clarity.
//noinspection RedundantIfStatement
if( isInternalQi4jMethod( method, baseClass ) )
{
return false; // Skip methods in Qi4j-internal interfaces
}
else
{
return true;
}
}
else
{
return false;
}
}
private static boolean isInternalQi4jMethod( Method method, Class baseClass )
{
return isDeclaredIn( method, Initializable.class, baseClass )
|| isDeclaredIn( method, Lifecycle.class, baseClass );
}
private static boolean isDeclaredIn( Method method, Class<?> clazz, Class<?> baseClass )
{
if( !clazz.isAssignableFrom( baseClass ) )
{
return false;
}
try
{
clazz.getMethod( method.getName(), method.getParameterTypes() );
return true;
}
catch( NoSuchMethodException e )
{
return false;
}
}
private static Class getInterfaceMethodDeclaration( Method method, Class clazz )
throws NoSuchMethodException
{
Iterable<Class<?>> interfaces = Iterables.map( Classes.RAW_CLASS, interfacesOf( clazz ) );
for( Class<?> anInterface : interfaces )
{
try
{
anInterface.getMethod( method.getName(), method.getParameterTypes() );
return anInterface;
}
catch( NoSuchMethodException e )
{
// Try next
}
}
throw new NoSuchMethodException( method.getName() );
}
private static boolean isInterfaceMethod( Method method, Class<?> baseClass )
{
for( Class<?> aClass : Iterables.filter( Methods.HAS_METHODS, Iterables.map( Classes.RAW_CLASS, interfacesOf( baseClass ) ) ) )
{
try
{
Method m = aClass.getMethod( method.getName(), method.getParameterTypes() );
m.setAccessible( true );
return true;
}
catch( NoSuchMethodException e )
{
// Ignore
}
}
return false;
}
private static void type( MethodVisitor mv, Class<?> aClass )
{
if( aClass.equals( Integer.TYPE ) )
{
mv.visitFieldInsn( GETSTATIC, "java/lang/Integer", "TYPE", "Ljava/lang/Class;" );
}
else if( aClass.equals( Long.TYPE ) )
{
mv.visitFieldInsn( GETSTATIC, "java/lang/Long", "TYPE", "Ljava/lang/Class;" );
}
else if( aClass.equals( Short.TYPE ) )
{
mv.visitFieldInsn( GETSTATIC, "java/lang/Short", "TYPE", "Ljava/lang/Class;" );
}
else if( aClass.equals( Byte.TYPE ) )
{
mv.visitFieldInsn( GETSTATIC, "java/lang/Byte", "TYPE", "Ljava/lang/Class;" );
}
else if( aClass.equals( Double.TYPE ) )
{
mv.visitFieldInsn( GETSTATIC, "java/lang/Double", "TYPE", "Ljava/lang/Class;" );
}
else if( aClass.equals( Float.TYPE ) )
{
mv.visitFieldInsn( GETSTATIC, "java/lang/Float", "TYPE", "Ljava/lang/Class;" );
}
else if( aClass.equals( Boolean.TYPE ) )
{
mv.visitFieldInsn( GETSTATIC, "java/lang/Boolean", "TYPE", "Ljava/lang/Class;" );
}
else if( aClass.equals( Character.TYPE ) )
{
mv.visitFieldInsn( GETSTATIC, "java/lang/Character", "TYPE", "Ljava/lang/Class;" );
}
else
{
mv.visitLdcInsn( Type.getType( aClass ) );
}
}
private static int wrapParameter( MethodVisitor mv, Class<?> aClass, int idx )
{
if( aClass.equals( Integer.TYPE ) )
{
mv.visitVarInsn( ILOAD, idx );
mv.visitMethodInsn( INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;" );
}
else if( aClass.equals( Long.TYPE ) )
{
mv.visitVarInsn( LLOAD, idx );
mv.visitMethodInsn( INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;" );
idx++; // Extra jump
}
else if( aClass.equals( Short.TYPE ) )
{
mv.visitVarInsn( ILOAD, idx );
mv.visitMethodInsn( INVOKESTATIC, "java/lang/Short", "valueOf", "(S)Ljava/lang/Short;" );
}
else if( aClass.equals( Byte.TYPE ) )
{
mv.visitVarInsn( ILOAD, idx );
mv.visitMethodInsn( INVOKESTATIC, "java/lang/Byte", "valueOf", "(B)Ljava/lang/Byte;" );
}
else if( aClass.equals( Double.TYPE ) )
{
mv.visitVarInsn( DLOAD, idx );
idx++; // Extra jump
mv.visitMethodInsn( INVOKESTATIC, "java/lang/Double", "valueOf", "(D)Ljava/lang/Double;" );
}
else if( aClass.equals( Float.TYPE ) )
{
mv.visitVarInsn( FLOAD, idx );
mv.visitMethodInsn( INVOKESTATIC, "java/lang/Float", "valueOf", "(F)Ljava/lang/Float;" );
}
else if( aClass.equals( Boolean.TYPE ) )
{
mv.visitVarInsn( ILOAD, idx );
mv.visitMethodInsn( INVOKESTATIC, "java/lang/Boolean", "valueOf", "(Z)Ljava/lang/Boolean;" );
}
else if( aClass.equals( Character.TYPE ) )
{
mv.visitVarInsn( ILOAD, idx );
mv.visitMethodInsn( INVOKESTATIC, "java/lang/Character", "valueOf", "(C)Ljava/lang/Character;" );
}
else
{
mv.visitVarInsn( ALOAD, idx );
}
return idx;
}
private static void unwrapResult( MethodVisitor mv, Class<?> aClass, Label label )
{
if( aClass.equals( Integer.TYPE ) )
{
mv.visitTypeInsn( CHECKCAST, "java/lang/Integer" );
mv.visitMethodInsn( INVOKEVIRTUAL, "java/lang/Integer", "intValue", "()I" );
mv.visitLabel( label );
mv.visitInsn( IRETURN );
}
else if( aClass.equals( Long.TYPE ) )
{
mv.visitTypeInsn( CHECKCAST, "java/lang/Long" );
mv.visitMethodInsn( INVOKEVIRTUAL, "java/lang/Long", "longValue", "()J" );
mv.visitLabel( label );
mv.visitInsn( LRETURN );
}
else if( aClass.equals( Short.TYPE ) )
{
mv.visitTypeInsn( CHECKCAST, "java/lang/Short" );
mv.visitMethodInsn( INVOKEVIRTUAL, "java/lang/Short", "shortValue", "()S" );
mv.visitLabel( label );
mv.visitInsn( IRETURN );
}
else if( aClass.equals( Byte.TYPE ) )
{
mv.visitTypeInsn( CHECKCAST, "java/lang/Byte" );
mv.visitMethodInsn( INVOKEVIRTUAL, "java/lang/Byte", "byteValue", "()B" );
mv.visitLabel( label );
mv.visitInsn( IRETURN );
}
else if( aClass.equals( Double.TYPE ) )
{
mv.visitTypeInsn( CHECKCAST, "java/lang/Double" );
mv.visitMethodInsn( INVOKEVIRTUAL, "java/lang/Double", "doubleValue", "()D" );
mv.visitLabel( label );
mv.visitInsn( DRETURN );
}
else if( aClass.equals( Float.TYPE ) )
{
mv.visitTypeInsn( CHECKCAST, "java/lang/Float" );
mv.visitMethodInsn( INVOKEVIRTUAL, "java/lang/Float", "floatValue", "()F" );
mv.visitLabel( label );
mv.visitInsn( FRETURN );
}
else if( aClass.equals( Boolean.TYPE ) )
{
mv.visitTypeInsn( CHECKCAST, "java/lang/Boolean" );
mv.visitMethodInsn( INVOKEVIRTUAL, "java/lang/Boolean", "booleanValue", "()Z" );
mv.visitLabel( label );
mv.visitInsn( IRETURN );
}
else if( aClass.equals( Character.TYPE ) )
{
mv.visitTypeInsn( CHECKCAST, "java/lang/Character" );
mv.visitMethodInsn( INVOKEVIRTUAL, "java/lang/Character", "charValue", "()C" );
mv.visitLabel( label );
mv.visitInsn( IRETURN );
}
else
{
mv.visitTypeInsn( CHECKCAST, getInternalName( aClass ) );
mv.visitLabel( label );
mv.visitInsn( ARETURN );
}
}
private static int loadParameter( MethodVisitor mv, Class<?> aClass, int idx )
{
if( aClass.equals( Integer.TYPE ) )
{
mv.visitVarInsn( ILOAD, idx );
}
else if( aClass.equals( Long.TYPE ) )
{
mv.visitVarInsn( LLOAD, idx );
idx++; // Extra jump
}
else if( aClass.equals( Short.TYPE ) )
{
mv.visitVarInsn( ILOAD, idx );
}
else if( aClass.equals( Byte.TYPE ) )
{
mv.visitVarInsn( ILOAD, idx );
}
else if( aClass.equals( Double.TYPE ) )
{
mv.visitVarInsn( DLOAD, idx );
idx++; // Extra jump
}
else if( aClass.equals( Float.TYPE ) )
{
mv.visitVarInsn( FLOAD, idx );
}
else if( aClass.equals( Boolean.TYPE ) )
{
mv.visitVarInsn( ILOAD, idx );
}
else if( aClass.equals( Character.TYPE ) )
{
mv.visitVarInsn( ILOAD, idx );
}
else
{
mv.visitVarInsn( ALOAD, idx );
}
return idx;
}
private static void returnResult( MethodVisitor mv, Class<?> aClass )
{
if( aClass.equals( Integer.TYPE ) )
{
mv.visitInsn( IRETURN );
}
else if( aClass.equals( Long.TYPE ) )
{
mv.visitInsn( LRETURN );
}
else if( aClass.equals( Short.TYPE ) )
{
mv.visitInsn( IRETURN );
}
else if( aClass.equals( Byte.TYPE ) )
{
mv.visitInsn( IRETURN );
}
else if( aClass.equals( Double.TYPE ) )
{
mv.visitInsn( DRETURN );
}
else if( aClass.equals( Float.TYPE ) )
{
mv.visitInsn( FRETURN );
}
else if( aClass.equals( Boolean.TYPE ) )
{
mv.visitInsn( IRETURN );
}
else if( aClass.equals( Character.TYPE ) )
{
mv.visitInsn( IRETURN );
}
else
{
mv.visitTypeInsn( CHECKCAST, getInternalName( aClass ) );
mv.visitInsn( ARETURN );
}
}
private static void insn( MethodVisitor mv, int length )
{
switch( length )
{
case 0:
mv.visitInsn( ICONST_0 );
return;
case 1:
mv.visitInsn( ICONST_1 );
return;
case 2:
mv.visitInsn( ICONST_2 );
return;
case 3:
mv.visitInsn( ICONST_3 );
return;
case 4:
mv.visitInsn( ICONST_4 );
return;
case 5:
mv.visitInsn( ICONST_5 );
return;
default:
mv.visitIntInsn( BIPUSH, length );
}
}
public static boolean isGenerated( Class clazz )
{
return clazz.getName().endsWith( GENERATED_POSTFIX );
}
public static boolean isGenerated( Object object )
{
return object.getClass().getName().endsWith( GENERATED_POSTFIX );
}
public Class loadFragmentClass( Class fragmentClass )
throws ClassNotFoundException
{
return loadClass( fragmentClass.getName().replace( '$', '_' ) + GENERATED_POSTFIX );
}
public static Class getSourceClass( Class fragmentClass )
{
return fragmentClass.getName().endsWith( GENERATED_POSTFIX ) ? fragmentClass.getSuperclass() : fragmentClass;
}
}