Java Bytecode.growStack方法代码示例

本文整理汇总了Java中javassist.bytecode.Bytecode.growStack方法的典型用法代码示例。如果您正苦于以下问题：Java Bytecode.growStack方法的具体用法？Java Bytecode.growStack怎么用？Java Bytecode.growStack使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类javassist.bytecode.Bytecode的用法示例。

在下文中一共展示了Bytecode.growStack方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。

示例1: addGetter

import javassist.bytecode.Bytecode; //导入方法依赖的package包/类
private void addGetter(ClassFile classfile, final Method[] getters) throws CannotCompileException {
	ConstPool cp = classfile.getConstPool();
	int target_type_index = cp.addClassInfo( this.targetBean.getName() );
	String desc = GET_SETTER_DESC;
	MethodInfo mi = new MethodInfo( cp, GENERATED_GETTER_NAME, desc );

	Bytecode code = new Bytecode( cp, 6, 4 );
	/* | this | bean | args | raw bean | */
	if ( getters.length >= 0 ) {
		// aload_1 // load bean
		code.addAload( 1 );
		// checkcast // cast bean
		code.addCheckcast( this.targetBean.getName() );
		// astore_3 // store bean
		code.addAstore( 3 );
		for ( int i = 0; i < getters.length; ++i ) {
			if ( getters[i] != null ) {
				Method getter = getters[i];
				// aload_2 // args
				code.addAload( 2 );
				// iconst_i // continue to aastore
				code.addIconst( i ); // growing stack is 1
				Class returnType = getter.getReturnType();
				int typeIndex = -1;
				if ( returnType.isPrimitive() ) {
					typeIndex = FactoryHelper.typeIndex( returnType );
					// new
					code.addNew( FactoryHelper.wrapperTypes[typeIndex] );
					// dup
					code.addOpcode( Opcode.DUP );
				}

				// aload_3 // load the raw bean
				code.addAload( 3 );
				String getter_desc = RuntimeSupport.makeDescriptor( getter );
				String getterName = getter.getName();
				if ( this.targetBean.isInterface() ) {
					// invokeinterface
					code.addInvokeinterface( target_type_index, getterName, getter_desc, 1 );
				}
				else {
					// invokevirtual
					code.addInvokevirtual( target_type_index, getterName, getter_desc );
				}

				if ( typeIndex >= 0 ) {       // is a primitive type
					// invokespecial
					code.addInvokespecial(
							FactoryHelper.wrapperTypes[typeIndex],
					        MethodInfo.nameInit,
					        FactoryHelper.wrapperDesc[typeIndex]
					);
				}

				// aastore // args
				code.add( Opcode.AASTORE );
				code.growStack( -3 );
			}
		}
	}
	// return
	code.addOpcode( Opcode.RETURN );

	mi.setCodeAttribute( code.toCodeAttribute() );
	mi.setAccessFlags( AccessFlag.PUBLIC );
	classfile.addMethod( mi );
}

开发者ID:cacheonix，项目名称:cacheonix-core，代码行数:68，代码来源:BulkAccessorFactory.java

示例2: addGetter

import javassist.bytecode.Bytecode; //导入方法依赖的package包/类
private void addGetter(ClassFile classfile, final Method[] getters) throws CannotCompileException {
	final ConstPool constPool = classfile.getConstPool();
	final int targetBeanConstPoolIndex = constPool.addClassInfo( this.targetBean.getName() );
	final String desc = GET_SETTER_DESC;
	final MethodInfo getterMethodInfo = new MethodInfo( constPool, GENERATED_GETTER_NAME, desc );

	final Bytecode code = new Bytecode( constPool, 6, 4 );
	/* | this | bean | args | raw bean | */
	if ( getters.length >= 0 ) {
		// aload_1 // load bean
		code.addAload( 1 );
		// checkcast // cast bean
		code.addCheckcast( this.targetBean.getName() );
		// astore_3 // store bean
		code.addAstore( 3 );
		for ( int i = 0; i < getters.length; ++i ) {
			if ( getters[i] != null ) {
				final Method getter = getters[i];
				// aload_2 // args
				code.addAload( 2 );
				// iconst_i // continue to aastore
				// growing stack is 1
				code.addIconst( i );
				final Class returnType = getter.getReturnType();
				int typeIndex = -1;
				if ( returnType.isPrimitive() ) {
					typeIndex = FactoryHelper.typeIndex( returnType );
					// new
					code.addNew( FactoryHelper.wrapperTypes[typeIndex] );
					// dup
					code.addOpcode( Opcode.DUP );
				}

				// aload_3 // load the raw bean
				code.addAload( 3 );
				final String getterSignature = RuntimeSupport.makeDescriptor( getter );
				final String getterName = getter.getName();
				if ( this.targetBean.isInterface() ) {
					// invokeinterface
					code.addInvokeinterface( targetBeanConstPoolIndex, getterName, getterSignature, 1 );
				}
				else {
					// invokevirtual
					code.addInvokevirtual( targetBeanConstPoolIndex, getterName, getterSignature );
				}

				if ( typeIndex >= 0 ) {
					// is a primitive type
					// invokespecial
					code.addInvokespecial(
							FactoryHelper.wrapperTypes[typeIndex],
							MethodInfo.nameInit,
							FactoryHelper.wrapperDesc[typeIndex]
					);
				}

				// aastore // args
				code.add( Opcode.AASTORE );
				code.growStack( -3 );
			}
		}
	}
	// return
	code.addOpcode( Opcode.RETURN );

	getterMethodInfo.setCodeAttribute( code.toCodeAttribute() );
	getterMethodInfo.setAccessFlags( AccessFlag.PUBLIC );
	classfile.addMethod( getterMethodInfo );
}

开发者ID:lamsfoundation，项目名称:lams，代码行数:70，代码来源:BulkAccessorFactory.java

示例3: addWriteMethod

import javassist.bytecode.Bytecode; //导入方法依赖的package包/类
private void addWriteMethod(ClassFile classfile, FieldInfo finfo) throws CannotCompileException, BadBytecode {
	final ConstPool constPool = classfile.getConstPool();
	final int thisClassInfo = constPool.getThisClassInfo();
	final String writeMethodDescriptor = "(" + finfo.getDescriptor() + ")V";
	final MethodInfo writeMethodInfo = new MethodInfo(
			constPool,
			EACH_WRITE_METHOD_PREFIX+ finfo.getName(),
			writeMethodDescriptor
	);

	/* local variables | target obj | each oldvalue | */
	final Bytecode code = new Bytecode(constPool, 6, 3);
	// aload_0
	code.addAload( 0 );
	// invokeinterface : enabled.getInterceptFieldCallback()
	final int enabledClassIndex = constPool.addClassInfo( FIELD_HANDLED_TYPE_NAME );
	code.addInvokeinterface(
			enabledClassIndex,
			GETFIELDHANDLER_METHOD_NAME, GETFIELDHANDLER_METHOD_DESCRIPTOR,
			1
	);
	// ifnonnull (label1)
	code.addOpcode( Opcode.IFNONNULL );
	code.addIndex( 9 );
	// aload_0
	code.addAload( 0 );
	// *load_1
	addTypeDependDataLoad( code, finfo.getDescriptor(), 1 );
	// putfield
	code.addOpcode( Opcode.PUTFIELD );
	final int baseFieldIndex = constPool.addFieldrefInfo( thisClassInfo, finfo.getName(), finfo.getDescriptor() );
	code.addIndex( baseFieldIndex );
	code.growStack( -Descriptor.dataSize( finfo.getDescriptor() ) );
	// return ;
	code.addOpcode( Opcode.RETURN );
	// aload_0
	code.addAload( 0 );
	// dup
	code.addOpcode( Opcode.DUP );
	// invokeinterface // enabled.getInterceptFieldCallback()
	code.addInvokeinterface(
			enabledClassIndex,
			GETFIELDHANDLER_METHOD_NAME,
			GETFIELDHANDLER_METHOD_DESCRIPTOR,
			1
	);
	// aload_0
	code.addAload( 0 );
	// ldc // field name
	code.addLdc( finfo.getName() );
	// aload_0
	code.addAload( 0 );
	// getfield // old value of the field
	code.addOpcode( Opcode.GETFIELD );
	code.addIndex( baseFieldIndex );
	code.growStack( Descriptor.dataSize( finfo.getDescriptor() ) - 1 );
	// *load_1
	addTypeDependDataLoad( code, finfo.getDescriptor(), 1 );
	// invokeinterface // callback.write*(..)
	addInvokeFieldHandlerMethod( classfile, code, finfo.getDescriptor(), false );
	// putfield // new value of the field
	code.addOpcode( Opcode.PUTFIELD );
	code.addIndex( baseFieldIndex );
	code.growStack( -Descriptor.dataSize( finfo.getDescriptor() ) );
	// return
	code.addOpcode( Opcode.RETURN );

	writeMethodInfo.setCodeAttribute( code.toCodeAttribute() );
	writeMethodInfo.setAccessFlags( AccessFlag.PUBLIC );
	final CodeAttribute codeAttribute = writeMethodInfo.getCodeAttribute();
	if ( codeAttribute != null ) {
		final StackMapTable smt = MapMaker.make( classPool, writeMethodInfo );
		codeAttribute.setAttribute( smt );
	}
	classfile.addMethod( writeMethodInfo );
}

开发者ID:lamsfoundation，项目名称:lams，代码行数:77，代码来源:FieldTransformer.java

示例4: addWriteMethod

import javassist.bytecode.Bytecode; //导入方法依赖的package包/类
private void addWriteMethod(ClassFile classfile, FieldInfo finfo)
		throws CannotCompileException {
	ConstPool cp = classfile.getConstPool();
	int this_class_index = cp.getThisClassInfo();
	String desc = "(" + finfo.getDescriptor() + ")V";
	MethodInfo minfo = new MethodInfo(cp, EACH_WRITE_METHOD_PREFIX
	                                      + finfo.getName(), desc);
	/* local variables | target obj | each oldvalue | */
	Bytecode code = new Bytecode(cp, 6, 3);
	// aload_0
	code.addAload(0);
	// invokeinterface // enabled.getInterceptFieldCallback()
	int enabled_class_index = cp.addClassInfo(FIELD_HANDLED_TYPE_NAME);
	code.addInvokeinterface(enabled_class_index,
	                        GETFIELDHANDLER_METHOD_NAME, GETFIELDHANDLER_METHOD_DESCRIPTOR,
	                        1);
	// ifnonnull (label1)
	code.addOpcode(Opcode.IFNONNULL);
	code.addIndex(9);
	// aload_0
	code.addAload(0);
	// *load_1
	addTypeDependDataLoad(code, finfo.getDescriptor(), 1);
	// putfield
	code.addOpcode(Opcode.PUTFIELD);
	int base_field_index = cp.addFieldrefInfo(this_class_index, finfo
			.getName(), finfo.getDescriptor());
	code.addIndex(base_field_index);
	code.growStack(-Descriptor.dataSize(finfo.getDescriptor()));
	// return ;
	code.addOpcode(Opcode.RETURN);
	// aload_0
	code.addAload(0);
	// dup
	code.addOpcode(Opcode.DUP);
	// invokeinterface // enabled.getInterceptFieldCallback()
	code.addInvokeinterface(enabled_class_index,
	                        GETFIELDHANDLER_METHOD_NAME, GETFIELDHANDLER_METHOD_DESCRIPTOR,
	                        1);
	// aload_0
	code.addAload(0);
	// ldc // field name
	code.addLdc(finfo.getName());
	// aload_0
	code.addAload(0);
	// getfield // old value of the field
	code.addOpcode(Opcode.GETFIELD);
	code.addIndex(base_field_index);
	code.growStack(Descriptor.dataSize(finfo.getDescriptor()) - 1);
	// *load_1
	addTypeDependDataLoad(code, finfo.getDescriptor(), 1);
	// invokeinterface // callback.write*(..)
	addInvokeFieldHandlerMethod(classfile, code, finfo.getDescriptor(),
	                            false);
	// putfield // new value of the field
	code.addOpcode(Opcode.PUTFIELD);
	code.addIndex(base_field_index);
	code.growStack(-Descriptor.dataSize(finfo.getDescriptor()));
	// return
	code.addOpcode(Opcode.RETURN);

	minfo.setCodeAttribute(code.toCodeAttribute());
	minfo.setAccessFlags(AccessFlag.PUBLIC);
	classfile.addMethod(minfo);
}

开发者ID:cacheonix，项目名称:cacheonix-core，代码行数:66，代码来源:FieldTransformer.java

注：本文中的javassist.bytecode.Bytecode.growStack方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。