| /* |
| * 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: ReferenceType.java,v 1.2.4.1 2005/09/05 11:29:12 pvedula Exp $ |
| */ |
| |
| package com.sun.org.apache.xalan.internal.xsltc.compiler.util; |
| |
| import com.sun.org.apache.bcel.internal.generic.PUSH; |
| 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.ConstantPoolGen; |
| import com.sun.org.apache.bcel.internal.generic.IFEQ; |
| import com.sun.org.apache.bcel.internal.generic.ILOAD; |
| import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE; |
| import com.sun.org.apache.bcel.internal.generic.INVOKESTATIC; |
| import com.sun.org.apache.bcel.internal.generic.Instruction; |
| import com.sun.org.apache.bcel.internal.generic.InstructionList; |
| |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.Constants; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.FlowList; |
| |
| import com.sun.org.apache.xml.internal.dtm.DTM; |
| |
| /** |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * @author Erwin Bolwidt <ejb@klomp.org> |
| */ |
| public final class ReferenceType extends Type { |
| protected ReferenceType() {} |
| |
| public String toString() { |
| return "reference"; |
| } |
| |
| public boolean identicalTo(Type other) { |
| return this == other; |
| } |
| |
| public String toSignature() { |
| return "Ljava/lang/Object;"; |
| } |
| |
| public com.sun.org.apache.bcel.internal.generic.Type toJCType() { |
| return com.sun.org.apache.bcel.internal.generic.Type.OBJECT; |
| } |
| |
| /** |
| * Translates a reference to an object of internal type <code>type</code>. |
| * The translation to int is undefined since references |
| * are always converted to reals in arithmetic expressions. |
| * |
| * @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 if (type == Type.Real) { |
| translateTo(classGen, methodGen, (RealType) type); |
| } |
| else if (type == Type.Boolean) { |
| translateTo(classGen, methodGen, (BooleanType) type); |
| } |
| else if (type == Type.NodeSet) { |
| translateTo(classGen, methodGen, (NodeSetType) type); |
| } |
| else if (type == Type.Node) { |
| translateTo(classGen, methodGen, (NodeType) type); |
| } |
| else if (type == Type.ResultTree) { |
| translateTo(classGen, methodGen, (ResultTreeType) type); |
| } |
| else if (type == Type.Object) { |
| translateTo(classGen, methodGen, (ObjectType) type); |
| } |
| else if (type == Type.Reference ) { |
| } |
| else { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.INTERNAL_ERR, type.toString()); |
| classGen.getParser().reportError(Constants.FATAL, err); |
| } |
| } |
| |
| /** |
| * Translates reference into object of internal type <code>type</code>. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| StringType type) { |
| final int current = methodGen.getLocalIndex("current"); |
| ConstantPoolGen cpg = classGen.getConstantPool(); |
| InstructionList il = methodGen.getInstructionList(); |
| |
| // If no current, conversion is a top-level |
| if (current < 0) { |
| il.append(new PUSH(cpg, DTM.ROOT_NODE)); // push root node |
| } |
| else { |
| il.append(new ILOAD(current)); |
| } |
| il.append(methodGen.loadDOM()); |
| final int stringF = cpg.addMethodref(BASIS_LIBRARY_CLASS, |
| "stringF", |
| "(" |
| + OBJECT_SIG |
| + NODE_SIG |
| + DOM_INTF_SIG |
| + ")" + STRING_SIG); |
| il.append(new INVOKESTATIC(stringF)); |
| } |
| |
| /** |
| * Translates a reference into an object of internal type <code>type</code>. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| RealType type) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| il.append(methodGen.loadDOM()); |
| int index = cpg.addMethodref(BASIS_LIBRARY_CLASS, "numberF", |
| "(" |
| + OBJECT_SIG |
| + DOM_INTF_SIG |
| + ")D"); |
| il.append(new INVOKESTATIC(index)); |
| } |
| |
| /** |
| * Translates a reference to an object of internal type <code>type</code>. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| BooleanType type) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| int index = cpg.addMethodref(BASIS_LIBRARY_CLASS, "booleanF", |
| "(" |
| + OBJECT_SIG |
| + ")Z"); |
| il.append(new INVOKESTATIC(index)); |
| } |
| |
| /** |
| * Casts a reference into a NodeIterator. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| NodeSetType type) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| int index = cpg.addMethodref(BASIS_LIBRARY_CLASS, "referenceToNodeSet", |
| "(" |
| + OBJECT_SIG |
| + ")" |
| + NODE_ITERATOR_SIG); |
| il.append(new INVOKESTATIC(index)); |
| |
| // Reset this iterator |
| index = cpg.addInterfaceMethodref(NODE_ITERATOR, RESET, RESET_SIG); |
| il.append(new INVOKEINTERFACE(index, 1)); |
| } |
| |
| /** |
| * Casts a reference into a Node. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| NodeType type) { |
| translateTo(classGen, methodGen, Type.NodeSet); |
| Type.NodeSet.translateTo(classGen, methodGen, type); |
| } |
| |
| /** |
| * Casts a reference into a ResultTree. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| ResultTreeType type) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| int index = cpg.addMethodref(BASIS_LIBRARY_CLASS, "referenceToResultTree", |
| "(" + OBJECT_SIG + ")" + DOM_INTF_SIG); |
| il.append(new INVOKESTATIC(index)); |
| } |
| |
| /** |
| * Subsume reference into ObjectType. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| ObjectType type) { |
| methodGen.getInstructionList().append(NOP); |
| } |
| |
| /** |
| * Translates a reference into the Java type denoted by <code>clazz</code>. |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| Class clazz) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| int referenceToLong = cpg.addMethodref(BASIS_LIBRARY_CLASS, |
| "referenceToLong", |
| "(" + OBJECT_SIG + ")J"); |
| int referenceToDouble = cpg.addMethodref(BASIS_LIBRARY_CLASS, |
| "referenceToDouble", |
| "(" + OBJECT_SIG + ")D"); |
| int referenceToBoolean = cpg.addMethodref(BASIS_LIBRARY_CLASS, |
| "referenceToBoolean", |
| "(" + OBJECT_SIG + ")Z"); |
| |
| if (clazz.getName().equals("java.lang.Object")) { |
| il.append(NOP); |
| } |
| else if (clazz == Double.TYPE) { |
| il.append(new INVOKESTATIC(referenceToDouble)); |
| } |
| else if (clazz.getName().equals("java.lang.Double")) { |
| il.append(new INVOKESTATIC(referenceToDouble)); |
| Type.Real.translateTo(classGen, methodGen, Type.Reference); |
| } |
| else if (clazz == Float.TYPE) { |
| il.append(new INVOKESTATIC(referenceToDouble)); |
| il.append(D2F); |
| } |
| else if (clazz.getName().equals("java.lang.String")) { |
| int index = cpg.addMethodref(BASIS_LIBRARY_CLASS, "referenceToString", |
| "(" |
| + OBJECT_SIG |
| + DOM_INTF_SIG |
| + ")" |
| + "Ljava/lang/String;"); |
| il.append(methodGen.loadDOM()); |
| il.append(new INVOKESTATIC(index)); |
| } |
| else if (clazz.getName().equals("org.w3c.dom.Node")) { |
| int index = cpg.addMethodref(BASIS_LIBRARY_CLASS, "referenceToNode", |
| "(" |
| + OBJECT_SIG |
| + DOM_INTF_SIG |
| + ")" |
| + "Lorg/w3c/dom/Node;"); |
| il.append(methodGen.loadDOM()); |
| il.append(new INVOKESTATIC(index)); |
| } |
| else if (clazz.getName().equals("org.w3c.dom.NodeList")) { |
| int index = cpg.addMethodref(BASIS_LIBRARY_CLASS, "referenceToNodeList", |
| "(" |
| + OBJECT_SIG |
| + DOM_INTF_SIG |
| + ")" |
| + "Lorg/w3c/dom/NodeList;"); |
| il.append(methodGen.loadDOM()); |
| il.append(new INVOKESTATIC(index)); |
| } |
| else if (clazz.getName().equals("com.sun.org.apache.xalan.internal.xsltc.DOM")) { |
| translateTo(classGen, methodGen, Type.ResultTree); |
| } |
| else if (clazz == Long.TYPE) { |
| il.append(new INVOKESTATIC(referenceToLong)); |
| } |
| else if (clazz == Integer.TYPE) { |
| il.append(new INVOKESTATIC(referenceToLong)); |
| il.append(L2I); |
| } |
| else if (clazz == Short.TYPE) { |
| il.append(new INVOKESTATIC(referenceToLong)); |
| il.append(L2I); |
| il.append(I2S); |
| } |
| else if (clazz == Byte.TYPE) { |
| il.append(new INVOKESTATIC(referenceToLong)); |
| il.append(L2I); |
| il.append(I2B); |
| } |
| else if (clazz == Character.TYPE) { |
| il.append(new INVOKESTATIC(referenceToLong)); |
| il.append(L2I); |
| il.append(I2C); |
| } |
| else if (clazz == java.lang.Boolean.TYPE) { |
| il.append(new INVOKESTATIC(referenceToBoolean)); |
| } |
| else if (clazz.getName().equals("java.lang.Boolean")) { |
| il.append(new INVOKESTATIC(referenceToBoolean)); |
| Type.Boolean.translateTo(classGen, methodGen, Type.Reference); |
| } |
| else { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR, |
| toString(), clazz.getName()); |
| classGen.getParser().reportError(Constants.FATAL, err); |
| } |
| } |
| |
| /** |
| * Translates an external Java type into a reference. Only conversion |
| * allowed is from java.lang.Object. |
| */ |
| public void translateFrom(ClassGenerator classGen, MethodGenerator methodGen, |
| Class clazz) { |
| if (clazz.getName().equals("java.lang.Object")) { |
| methodGen.getInstructionList().append(NOP); |
| } |
| else { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR, |
| toString(), clazz.getName()); |
| classGen.getParser().reportError(Constants.FATAL, err); |
| } |
| } |
| |
| /** |
| * Expects a reference on the stack and translates it to a non-synthesized |
| * boolean. It does not push a 0 or a 1 but instead returns branchhandle |
| * list to be appended to the false list. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateToDesynthesized |
| */ |
| public FlowList translateToDesynthesized(ClassGenerator classGen, |
| MethodGenerator methodGen, |
| BooleanType type) { |
| InstructionList il = methodGen.getInstructionList(); |
| translateTo(classGen, methodGen, type); |
| return new FlowList(il.append(new IFEQ(null))); |
| } |
| |
| /** |
| * Translates an object of this type to its boxed representation. |
| */ |
| public void translateBox(ClassGenerator classGen, |
| MethodGenerator methodGen) { |
| } |
| |
| /** |
| * Translates an object of this type to its unboxed representation. |
| */ |
| public void translateUnBox(ClassGenerator classGen, |
| MethodGenerator methodGen) { |
| } |
| |
| |
| public Instruction LOAD(int slot) { |
| return new ALOAD(slot); |
| } |
| |
| public Instruction STORE(int slot) { |
| return new ASTORE(slot); |
| } |
| } |
