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Java Opcode类代码示例

本文整理汇总了Java中javassist.bytecode.Opcode类的典型用法代码示例。如果您正苦于以下问题：Java Opcode类的具体用法？Java Opcode怎么用？Java Opcode使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。


Opcode类属于javassist.bytecode包，在下文中一共展示了Opcode类的15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: addDefaultConstructor

import javassist.bytecode.Opcode; //导入依赖的package包/类
/**
 * Declares a constructor that takes no parameter.
 *
 * @param classfile The class descriptor
 *
 * @throws CannotCompileException Indicates trouble with the underlying Javassist calls
 */
private void addDefaultConstructor(ClassFile classfile) throws CannotCompileException {
	final ConstPool constPool = classfile.getConstPool();
	final String constructorSignature = "()V";
	final MethodInfo constructorMethodInfo = new MethodInfo( constPool, MethodInfo.nameInit, constructorSignature );

	final Bytecode code = new Bytecode( constPool, 0, 1 );
	// aload_0
	code.addAload( 0 );
	// invokespecial
	code.addInvokespecial( BulkAccessor.class.getName(), MethodInfo.nameInit, constructorSignature );
	// return
	code.addOpcode( Opcode.RETURN );

	constructorMethodInfo.setCodeAttribute( code.toCodeAttribute() );
	constructorMethodInfo.setAccessFlags( AccessFlag.PUBLIC );
	classfile.addMethod( constructorMethodInfo );
}
开发者ID:lamsfoundation，项目名称:lams，代码行数:25，代码来源:BulkAccessorFactory.java

示例2: transformInvokevirtualsIntoGetfields

import javassist.bytecode.Opcode; //导入依赖的package包/类
private int transformInvokevirtualsIntoGetfields(ClassFile classfile, CodeIterator iter, int pos) {
	final ConstPool constPool = classfile.getConstPool();
	final int c = iter.byteAt( pos );
	if ( c != Opcode.GETFIELD ) {
		return pos;
	}

	final int index = iter.u16bitAt( pos + 1 );
	final String fieldName = constPool.getFieldrefName( index );
	final String className = constPool.getFieldrefClassName( index );
	if ( !filter.handleReadAccess( className, fieldName ) ) {
		return pos;
	}

	final String fieldReaderMethodDescriptor = "()" + constPool.getFieldrefType( index );
	final int fieldReaderMethodIndex = constPool.addMethodrefInfo(
			constPool.getThisClassInfo(),
			EACH_READ_METHOD_PREFIX + fieldName,
			fieldReaderMethodDescriptor
	);
	iter.writeByte( Opcode.INVOKEVIRTUAL, pos );
	iter.write16bit( fieldReaderMethodIndex, pos + 1 );
	return pos;
}
开发者ID:lamsfoundation，项目名称:lams，代码行数:25，代码来源:FieldTransformer.java

示例3: transformInvokevirtualsIntoPutfields

import javassist.bytecode.Opcode; //导入依赖的package包/类
private int transformInvokevirtualsIntoPutfields(ClassFile classfile, CodeIterator iter, int pos) {
	final ConstPool constPool = classfile.getConstPool();
	final int c = iter.byteAt( pos );
	if ( c != Opcode.PUTFIELD ) {
		return pos;
	}

	final int index = iter.u16bitAt( pos + 1 );
	final String fieldName = constPool.getFieldrefName( index );
	final String className = constPool.getFieldrefClassName( index );
	if ( !filter.handleWriteAccess( className, fieldName ) ) {
		return pos;
	}

	final String fieldWriterMethodDescriptor = "(" + constPool.getFieldrefType( index ) + ")V";
	final int fieldWriterMethodIndex = constPool.addMethodrefInfo(
			constPool.getThisClassInfo(),
			EACH_WRITE_METHOD_PREFIX + fieldName,
			fieldWriterMethodDescriptor
	);
	iter.writeByte( Opcode.INVOKEVIRTUAL, pos );
	iter.write16bit( fieldWriterMethodIndex, pos + 1 );
	return pos;
}
开发者ID:lamsfoundation，项目名称:lams，代码行数:25，代码来源:FieldTransformer.java

示例4: getNext

import javassist.bytecode.Opcode; //导入依赖的package包/类
private CheckCast getNext() throws BadBytecode {
	int prevPos = 0;
	while (m_iter.hasNext()) {
		int pos = m_iter.next();
		int opcode = m_iter.byteAt(pos);
		switch (opcode) {
			case Opcode.CHECKCAST:
				
				// get the type of this op code (next two bytes are a classinfo index)
				MethodEntry prevMethodEntry = getMethodEntry(prevPos);
				if (prevMethodEntry != null) {
					return new CheckCast(m_constants.getClassInfo(m_iter.s16bitAt(pos + 1)), prevMethodEntry);
				}
			break;
		}
		prevPos = pos;
	}
	return null;
}
开发者ID:cccssw，项目名称:enigma-vk，代码行数:20，代码来源:CheckCastIterator.java

示例5: addDefaultConstructor

import javassist.bytecode.Opcode; //导入依赖的package包/类
/**
 * Declares a constructor that takes no parameter.
 *
 * @param classfile
 * @throws CannotCompileException
 */
private void addDefaultConstructor(ClassFile classfile) throws CannotCompileException {
	ConstPool cp = classfile.getConstPool();
	String cons_desc = "()V";
	MethodInfo mi = new MethodInfo( cp, MethodInfo.nameInit, cons_desc );

	Bytecode code = new Bytecode( cp, 0, 1 );
	// aload_0
	code.addAload( 0 );
	// invokespecial
	code.addInvokespecial( BulkAccessor.class.getName(), MethodInfo.nameInit, cons_desc );
	// 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:24，代码来源:BulkAccessorFactory.java

示例6: addGetFieldHandlerMethod

import javassist.bytecode.Opcode; //导入依赖的package包/类
private void addGetFieldHandlerMethod(ClassFile classfile)
		throws CannotCompileException {
	ConstPool cp = classfile.getConstPool();
	int this_class_index = cp.getThisClassInfo();
	MethodInfo minfo = new MethodInfo(cp, GETFIELDHANDLER_METHOD_NAME,
	                                  GETFIELDHANDLER_METHOD_DESCRIPTOR);
	/* local variable | this | */
	Bytecode code = new Bytecode(cp, 2, 1);
	// aload_0 // load this
	code.addAload(0);
	// getfield // get field "$JAVASSIST_CALLBACK" defined already
	code.addOpcode(Opcode.GETFIELD);
	int field_index = cp.addFieldrefInfo(this_class_index,
	                                     HANDLER_FIELD_NAME, HANDLER_FIELD_DESCRIPTOR);
	code.addIndex(field_index);
	// areturn // return the value of the field
	code.addOpcode(Opcode.ARETURN);
	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:22，代码来源:FieldTransformer.java

示例7: addSetFieldHandlerMethod

import javassist.bytecode.Opcode; //导入依赖的package包/类
private void addSetFieldHandlerMethod(ClassFile classfile)
		throws CannotCompileException {
	ConstPool cp = classfile.getConstPool();
	int this_class_index = cp.getThisClassInfo();
	MethodInfo minfo = new MethodInfo(cp, SETFIELDHANDLER_METHOD_NAME,
	                                  SETFIELDHANDLER_METHOD_DESCRIPTOR);
	/* local variables | this | callback | */
	Bytecode code = new Bytecode(cp, 3, 3);
	// aload_0 // load this
	code.addAload(0);
	// aload_1 // load callback
	code.addAload(1);
	// putfield // put field "$JAVASSIST_CALLBACK" defined already
	code.addOpcode(Opcode.PUTFIELD);
	int field_index = cp.addFieldrefInfo(this_class_index,
	                                     HANDLER_FIELD_NAME, HANDLER_FIELD_DESCRIPTOR);
	code.addIndex(field_index);
	// 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:24，代码来源:FieldTransformer.java

示例8: transformInvokevirtualsIntoGetfields

import javassist.bytecode.Opcode; //导入依赖的package包/类
private int transformInvokevirtualsIntoGetfields(ClassFile classfile,
                                                 CodeIterator iter, int pos) {
	ConstPool cp = classfile.getConstPool();
	int c = iter.byteAt(pos);
	if (c != Opcode.GETFIELD) {
		return pos;
	}
	int index = iter.u16bitAt(pos + 1);
	String fieldName = cp.getFieldrefName(index);
	String className = cp.getFieldrefClassName(index);
	if ((!classfile.getName().equals(className))
	    || (!readableFields.containsKey(fieldName))) {
		return pos;
	}
	String desc = "()" + (String) readableFields.get(fieldName);
	int read_method_index = cp.addMethodrefInfo(cp.getThisClassInfo(),
	                                            EACH_READ_METHOD_PREFIX + fieldName, desc);
	iter.writeByte(Opcode.INVOKEVIRTUAL, pos);
	iter.write16bit(read_method_index, pos + 1);
	return pos;
}
开发者ID:cacheonix，项目名称:cacheonix-core，代码行数:22，代码来源:FieldTransformer.java

示例9: transformInvokevirtualsIntoPutfields

import javassist.bytecode.Opcode; //导入依赖的package包/类
private int transformInvokevirtualsIntoPutfields(ClassFile classfile,
                                                 CodeIterator iter, int pos) {
	ConstPool cp = classfile.getConstPool();
	int c = iter.byteAt(pos);
	if (c != Opcode.PUTFIELD) {
		return pos;
	}
	int index = iter.u16bitAt(pos + 1);
	String fieldName = cp.getFieldrefName(index);
	String className = cp.getFieldrefClassName(index);
	if ((!classfile.getName().equals(className))
	    || (!writableFields.containsKey(fieldName))) {
		return pos;
	}
	String desc = "(" + (String) writableFields.get(fieldName) + ")V";
	int write_method_index = cp.addMethodrefInfo(cp.getThisClassInfo(),
	                                             EACH_WRITE_METHOD_PREFIX + fieldName, desc);
	iter.writeByte(Opcode.INVOKEVIRTUAL, pos);
	iter.write16bit(write_method_index, pos + 1);
	return pos;
}
开发者ID:cacheonix，项目名称:cacheonix-core，代码行数:22，代码来源:FieldTransformer.java

示例10: addTypeDependDataReturn

import javassist.bytecode.Opcode; //导入依赖的package包/类
private static void addTypeDependDataReturn(Bytecode code, String typeName) {
	if ((typeName.charAt(0) == 'L')
	    && (typeName.charAt(typeName.length() - 1) == ';')
	    || (typeName.charAt(0) == '[')) {
		// reference type
		code.addOpcode(Opcode.ARETURN);
	} else if (typeName.equals("Z") || typeName.equals("B")
	           || typeName.equals("C") || typeName.equals("I")
	           || typeName.equals("S")) {
		// boolean, byte, char, int, short
		code.addOpcode(Opcode.IRETURN);
	} else if (typeName.equals("D")) {
		// double
		code.addOpcode(Opcode.DRETURN);
	} else if (typeName.equals("F")) {
		// float
		code.addOpcode(Opcode.FRETURN);
	} else if (typeName.equals("J")) {
		// long
		code.addOpcode(Opcode.LRETURN);
	} else {
		// bad type
		throw new RuntimeException("bad type: " + typeName);
	}
}
开发者ID:cacheonix，项目名称:cacheonix-core，代码行数:26，代码来源:FieldTransformer.java

示例11: getNext

import javassist.bytecode.Opcode; //导入依赖的package包/类
private CheckCast getNext() throws BadBytecode
{
	int prevPos = 0;
	while(m_iter.hasNext())
	{
		int pos = m_iter.next();
		int opcode = m_iter.byteAt(pos);
		switch(opcode)
		{
			case Opcode.CHECKCAST:
				
				// get the type of this op code (next two bytes are a
				// classinfo index)
				MethodEntry prevMethodEntry = getMethodEntry(prevPos);
				if(prevMethodEntry != null)
					return new CheckCast(m_constants.getClassInfo(m_iter
						.s16bitAt(pos + 1)), prevMethodEntry);
				break;
		}
		prevPos = pos;
	}
	return null;
}
开发者ID:Wurst-Imperium，项目名称:Wurst-Enigma，代码行数:24，代码来源:CheckCastIterator.java

示例12: edit

import javassist.bytecode.Opcode; //导入依赖的package包/类
/**
 * Edits a method call.
 * 
 * @param mc the method call
 * @throws CannotCompileException in case that compile errors occur
 */
public void edit(MethodCall mc) throws CannotCompileException {
    if (mc.getMethodName().equals("byteAt")) {
        try {
            String opcode = Opcode.class.getName();
            CtMethod method = mc.getMethod();
            CtClass declaring = method.getDeclaringClass();
            if (declaring.getName().equals(
                CodeIterator.class.getName())) {
                mc.replace("$_ = $proceed($$); " 
                    + "if (disableInstanceof && $_==" 
                    + opcode + ".INSTANCEOF)" 
                    + "{return false;}" 
                    + "if (disableCast && $_==" 
                    + opcode + ".CHECKCAST)" 
                    + "{return false;}");
            }
        } catch (NotFoundException e) {
            throw new CannotCompileException(e);
        }
    }
}
开发者ID:SSEHUB，项目名称:spassMeter，代码行数:28，代码来源:CodeProcessor.java

示例13: addGetFieldHandlerMethod

import javassist.bytecode.Opcode; //导入依赖的package包/类
private void addGetFieldHandlerMethod(ClassFile classfile) throws CannotCompileException, BadBytecode {
	final ConstPool constPool = classfile.getConstPool();
	final int thisClassInfo = constPool.getThisClassInfo();
	final MethodInfo getterMethodInfo = new MethodInfo(
			constPool,
			GETFIELDHANDLER_METHOD_NAME,
			GETFIELDHANDLER_METHOD_DESCRIPTOR
	);

	/* local variable | this | */
	final Bytecode code = new Bytecode( constPool, 2, 1 );
	// aload_0 // load this
	code.addAload( 0 );
	// getfield // get field "$JAVASSIST_CALLBACK" defined already
	code.addOpcode( Opcode.GETFIELD );
	final int fieldIndex = constPool.addFieldrefInfo( thisClassInfo, HANDLER_FIELD_NAME, HANDLER_FIELD_DESCRIPTOR );
	code.addIndex( fieldIndex );
	// areturn // return the value of the field
	code.addOpcode( Opcode.ARETURN );
	getterMethodInfo.setCodeAttribute( code.toCodeAttribute() );
	getterMethodInfo.setAccessFlags( AccessFlag.PUBLIC );
	final CodeAttribute codeAttribute = getterMethodInfo.getCodeAttribute();
	if ( codeAttribute != null ) {
		final StackMapTable smt = MapMaker.make( classPool, getterMethodInfo );
		codeAttribute.setAttribute( smt );
	}
	classfile.addMethod( getterMethodInfo );
}
开发者ID:lamsfoundation，项目名称:lams，代码行数:29，代码来源:FieldTransformer.java

示例14: addSetFieldHandlerMethod

import javassist.bytecode.Opcode; //导入依赖的package包/类
private void addSetFieldHandlerMethod(ClassFile classfile) throws CannotCompileException, BadBytecode {
	final ConstPool constPool = classfile.getConstPool();
	final int thisClassInfo = constPool.getThisClassInfo();
	final MethodInfo methodInfo = new MethodInfo(
			constPool,
			SETFIELDHANDLER_METHOD_NAME,
			SETFIELDHANDLER_METHOD_DESCRIPTOR
	);

	/* local variables | this | callback | */
	final Bytecode code = new Bytecode(constPool, 3, 3);
	// aload_0 : load this
	code.addAload( 0 );
	// aload_1 : load callback
	code.addAload( 1 );
	// putfield // put field "$JAVASSIST_CALLBACK" defined already
	code.addOpcode( Opcode.PUTFIELD );
	final int fieldIndex = constPool.addFieldrefInfo( thisClassInfo, HANDLER_FIELD_NAME, HANDLER_FIELD_DESCRIPTOR );
	code.addIndex( fieldIndex );
	// return
	code.addOpcode( Opcode.RETURN );
	methodInfo.setCodeAttribute( code.toCodeAttribute() );
	methodInfo.setAccessFlags( AccessFlag.PUBLIC );
	final CodeAttribute codeAttribute = methodInfo.getCodeAttribute();
	if ( codeAttribute != null ) {
		final StackMapTable smt = MapMaker.make( classPool, methodInfo );
		codeAttribute.setAttribute( smt );
	}
	classfile.addMethod( methodInfo );
}
开发者ID:lamsfoundation，项目名称:lams，代码行数:31，代码来源:FieldTransformer.java

示例15: addTypeDependDataReturn

import javassist.bytecode.Opcode; //导入依赖的package包/类
private static void addTypeDependDataReturn(Bytecode code, String typeName) {
	if ( typeName.charAt( 0 ) == 'L'
			&& typeName.charAt( typeName.length() - 1 ) == ';'
			|| typeName.charAt( 0 ) == '[') {
		// reference type
		code.addOpcode( Opcode.ARETURN );
	}
	else if ( typeName.equals( "Z" )
			|| typeName.equals( "B" )
			|| typeName.equals( "C" )
			|| typeName.equals( "I" )
			|| typeName.equals( "S" ) ) {
		// boolean, byte, char, int, short
		code.addOpcode( Opcode.IRETURN );
	}
	else if ( typeName.equals( "D" ) ) {
		// double
		code.addOpcode( Opcode.DRETURN );
	}
	else if ( typeName.equals( "F" ) ) {
		// float
		code.addOpcode( Opcode.FRETURN );
	}
	else if ( typeName.equals( "J" ) ) {
		// long
		code.addOpcode( Opcode.LRETURN );
	}
	else {
		// bad type
		throw new RuntimeException( "bad type: " + typeName );
	}
}
开发者ID:lamsfoundation，项目名称:lams，代码行数:33，代码来源:FieldTransformer.java


注：本文中的javassist.bytecode.Opcode类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。