| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 2001-2004 The Apache Software Foundation. |
| * |
| * 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. |
| */ |
| /* |
| * $Id: ObjectType.java,v 1.2.4.1 2005/09/12 11:45:54 pvedula Exp $ |
| */ |
| |
| package com.sun.org.apache.xalan.internal.xsltc.compiler.util; |
| |
| import com.sun.org.apache.bcel.internal.generic.ALOAD; |
| import com.sun.org.apache.bcel.internal.generic.ASTORE; |
| import com.sun.org.apache.bcel.internal.generic.BranchHandle; |
| import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; |
| import com.sun.org.apache.bcel.internal.generic.GOTO; |
| import com.sun.org.apache.bcel.internal.generic.IFNULL; |
| import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL; |
| import com.sun.org.apache.bcel.internal.generic.Instruction; |
| import com.sun.org.apache.bcel.internal.generic.InstructionList; |
| import com.sun.org.apache.bcel.internal.generic.PUSH; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.Constants; |
| import com.sun.org.apache.xalan.internal.utils.ObjectFactory; |
| |
| /** |
| * @author Todd Miller |
| * @author Santiago Pericas-Geertsen |
| */ |
| public final class ObjectType extends Type { |
| |
| private String _javaClassName = "java.lang.Object"; |
| private Class _clazz = java.lang.Object.class; |
| |
| /** |
| * Used to represent a Java Class type such is required to support |
| * non-static java functions. |
| * @param javaClassName name of the class such as 'com.foo.Processor' |
| */ |
| protected ObjectType(String javaClassName) { |
| _javaClassName = javaClassName; |
| |
| try { |
| _clazz = ObjectFactory.findProviderClass(javaClassName, true); |
| } |
| catch (ClassNotFoundException e) { |
| _clazz = null; |
| } |
| } |
| |
| protected ObjectType(Class clazz) { |
| _clazz = clazz; |
| _javaClassName = clazz.getName(); |
| } |
| |
| /** |
| * Must return the same value for all ObjectType instances. This is |
| * needed in CastExpr to ensure the mapping table is used correctly. |
| */ |
| public int hashCode() { |
| return java.lang.Object.class.hashCode(); |
| } |
| |
| public boolean equals(Object obj) { |
| return (obj instanceof ObjectType); |
| } |
| |
| public String getJavaClassName() { |
| return _javaClassName; |
| } |
| |
| public Class getJavaClass() { |
| return _clazz; |
| } |
| |
| public String toString() { |
| return _javaClassName; |
| } |
| |
| public boolean identicalTo(Type other) { |
| return this == other; |
| } |
| |
| public String toSignature() { |
| final StringBuffer result = new StringBuffer("L"); |
| result.append(_javaClassName.replace('.', '/')).append(';'); |
| return result.toString(); |
| } |
| |
| public com.sun.org.apache.bcel.internal.generic.Type toJCType() { |
| return Util.getJCRefType(toSignature()); |
| } |
| |
| /** |
| * Translates a void into an object of internal type <code>type</code>. |
| * This translation is needed when calling external functions |
| * that return void. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| Type type) { |
| if (type == Type.String) { |
| translateTo(classGen, methodGen, (StringType) type); |
| } |
| else { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR, |
| toString(), type.toString()); |
| classGen.getParser().reportError(Constants.FATAL, err); |
| } |
| } |
| |
| /** |
| * Expects an integer on the stack and pushes its string value by calling |
| * <code>Integer.toString(int i)</code>. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| StringType type) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| il.append(DUP); |
| final BranchHandle ifNull = il.append(new IFNULL(null)); |
| il.append(new INVOKEVIRTUAL(cpg.addMethodref(_javaClassName, |
| "toString", |
| "()" + STRING_SIG))); |
| final BranchHandle gotobh = il.append(new GOTO(null)); |
| ifNull.setTarget(il.append(POP)); |
| il.append(new PUSH(cpg, "")); |
| gotobh.setTarget(il.append(NOP)); |
| } |
| |
| /** |
| * Translates an object of this type to the external (Java) type denoted |
| * by <code>clazz</code>. This method is used to translate parameters |
| * when external functions are called. |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| Class clazz) { |
| if (clazz.isAssignableFrom(_clazz)) |
| methodGen.getInstructionList().append(NOP); |
| else { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR, |
| toString(), clazz.getClass().toString()); |
| classGen.getParser().reportError(Constants.FATAL, err); |
| } |
| } |
| |
| /** |
| * Translates an external Java type into an Object type |
| */ |
| public void translateFrom(ClassGenerator classGen, |
| MethodGenerator methodGen, Class clazz) { |
| methodGen.getInstructionList().append(NOP); |
| } |
| |
| public Instruction LOAD(int slot) { |
| return new ALOAD(slot); |
| } |
| |
| public Instruction STORE(int slot) { |
| return new ASTORE(slot); |
| } |
| } |