| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 com.sun.org.apache.xalan.internal.xsltc.compiler.util; |
| |
| import com.sun.org.apache.bcel.internal.generic.BranchHandle; |
| import com.sun.org.apache.bcel.internal.generic.CHECKCAST; |
| import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; |
| import com.sun.org.apache.bcel.internal.generic.GETFIELD; |
| import com.sun.org.apache.bcel.internal.generic.GOTO; |
| 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.INVOKESPECIAL; |
| import com.sun.org.apache.bcel.internal.generic.ISTORE; |
| 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.NEW; |
| 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.xsltc.compiler.FlowList; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.NodeTest; |
| |
| /** |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| */ |
| public final class NodeType extends Type { |
| private final int _type; |
| |
| protected NodeType() { |
| this(NodeTest.ANODE); |
| } |
| |
| protected NodeType(int type) { |
| _type = type; |
| } |
| |
| public int getType() { |
| return _type; |
| } |
| |
| public String toString() { |
| return "node-type"; |
| } |
| |
| public boolean identicalTo(Type other) { |
| return other instanceof NodeType; |
| } |
| |
| public int hashCode() { |
| return _type; |
| } |
| |
| public String toSignature() { |
| return "I"; |
| } |
| |
| public com.sun.org.apache.bcel.internal.generic.Type toJCType() { |
| return com.sun.org.apache.bcel.internal.generic.Type.INT; |
| } |
| |
| /** |
| * Translates a node into an object of internal type <code>type</code>. |
| * The translation to int is undefined since nodes 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.Boolean) { |
| translateTo(classGen, methodGen, (BooleanType) type); |
| } |
| else if (type == Type.Real) { |
| translateTo(classGen, methodGen, (RealType) type); |
| } |
| else if (type == Type.NodeSet) { |
| translateTo(classGen, methodGen, (NodeSetType) type); |
| } |
| else if (type == Type.Reference) { |
| translateTo(classGen, methodGen, (ReferenceType) type); |
| } |
| else if (type == Type.Object) { |
| translateTo(classGen, methodGen, (ObjectType) type); |
| } |
| else { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR, |
| toString(), type.toString()); |
| classGen.getParser().reportError(Constants.FATAL, err); |
| } |
| } |
| |
| /** |
| * Expects a node on the stack and pushes its string value. |
| * |
| * @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(); |
| |
| switch (_type) { |
| case NodeTest.ROOT: |
| case NodeTest.ELEMENT: |
| il.append(methodGen.loadDOM()); |
| il.append(SWAP); // dom ref must be below node index |
| int index = cpg.addInterfaceMethodref(DOM_INTF, |
| GET_ELEMENT_VALUE, |
| GET_ELEMENT_VALUE_SIG); |
| il.append(new INVOKEINTERFACE(index, 2)); |
| break; |
| |
| case NodeTest.ANODE: |
| case NodeTest.COMMENT: |
| case NodeTest.ATTRIBUTE: |
| case NodeTest.PI: |
| il.append(methodGen.loadDOM()); |
| il.append(SWAP); // dom ref must be below node index |
| index = cpg.addInterfaceMethodref(DOM_INTF, |
| GET_NODE_VALUE, |
| GET_NODE_VALUE_SIG); |
| il.append(new INVOKEINTERFACE(index, 2)); |
| break; |
| |
| default: |
| ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR, |
| toString(), type.toString()); |
| classGen.getParser().reportError(Constants.FATAL, err); |
| break; |
| } |
| } |
| |
| /** |
| * Translates a node into a synthesized boolean. |
| * If the expression is "@attr", |
| * then "true" is pushed iff "attr" is an attribute of the current node. |
| * If the expression is ".", the result is always "true". |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| BooleanType type) { |
| final InstructionList il = methodGen.getInstructionList(); |
| FlowList falsel = translateToDesynthesized(classGen, methodGen, type); |
| il.append(ICONST_1); |
| final BranchHandle truec = il.append(new GOTO(null)); |
| falsel.backPatch(il.append(ICONST_0)); |
| truec.setTarget(il.append(NOP)); |
| } |
| |
| /** |
| * Expects a node on the stack and pushes a real. |
| * First the node is converted to string, and from string to real. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| RealType type) { |
| translateTo(classGen, methodGen, Type.String); |
| Type.String.translateTo(classGen, methodGen, Type.Real); |
| } |
| |
| /** |
| * Expects a node on the stack and pushes a singleton node-set. Singleton |
| * iterators are already started after construction. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| NodeSetType type) { |
| ConstantPoolGen cpg = classGen.getConstantPool(); |
| InstructionList il = methodGen.getInstructionList(); |
| |
| // Create a new instance of SingletonIterator |
| il.append(new NEW(cpg.addClass(SINGLETON_ITERATOR))); |
| il.append(DUP_X1); |
| il.append(SWAP); |
| final int init = cpg.addMethodref(SINGLETON_ITERATOR, "<init>", |
| "(" + NODE_SIG +")V"); |
| il.append(new INVOKESPECIAL(init)); |
| } |
| |
| /** |
| * Subsume Node 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 node into 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) { |
| final InstructionList il = methodGen.getInstructionList(); |
| return new FlowList(il.append(new IFEQ(null))); |
| } |
| |
| /** |
| * Expects a node on the stack and pushes a boxed node. Boxed nodes |
| * are represented by an instance of <code>com.sun.org.apache.xalan.internal.xsltc.dom.Node</code>. |
| * |
| * @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| ReferenceType type) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| il.append(new NEW(cpg.addClass(RUNTIME_NODE_CLASS))); |
| il.append(DUP_X1); |
| il.append(SWAP); |
| il.append(new PUSH(cpg, _type)); |
| il.append(new INVOKESPECIAL(cpg.addMethodref(RUNTIME_NODE_CLASS, |
| "<init>", "(II)V"))); |
| } |
| |
| /** |
| * Translates a node into the Java type denoted by <code>clazz</code>. |
| * Expects a node on the stack and pushes an object of the appropriate |
| * type after coercion. |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| Class clazz) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| String className = clazz.getName(); |
| if (className.equals("java.lang.String")) { |
| translateTo(classGen, methodGen, Type.String); |
| return; |
| } |
| |
| il.append(methodGen.loadDOM()); |
| il.append(SWAP); // dom ref must be below node index |
| |
| if (className.equals("org.w3c.dom.Node") || |
| className.equals("java.lang.Object")) { |
| int index = cpg.addInterfaceMethodref(DOM_INTF, |
| MAKE_NODE, |
| MAKE_NODE_SIG); |
| il.append(new INVOKEINTERFACE(index, 2)); |
| } |
| else if (className.equals("org.w3c.dom.NodeList")) { |
| int index = cpg.addInterfaceMethodref(DOM_INTF, |
| MAKE_NODE_LIST, |
| MAKE_NODE_LIST_SIG); |
| il.append(new INVOKEINTERFACE(index, 2)); |
| } |
| else { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR, |
| toString(), className); |
| classGen.getParser().reportError(Constants.FATAL, err); |
| } |
| } |
| |
| /** |
| * Translates an object of this type to its boxed representation. |
| */ |
| public void translateBox(ClassGenerator classGen, |
| MethodGenerator methodGen) { |
| translateTo(classGen, methodGen, Type.Reference); |
| } |
| |
| /** |
| * Translates an object of this type to its unboxed representation. |
| */ |
| public void translateUnBox(ClassGenerator classGen, |
| MethodGenerator methodGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| il.append(new CHECKCAST(cpg.addClass(RUNTIME_NODE_CLASS))); |
| il.append(new GETFIELD(cpg.addFieldref(RUNTIME_NODE_CLASS, |
| NODE_FIELD, |
| NODE_FIELD_SIG))); |
| } |
| |
| /** |
| * Returns the class name of an internal type's external representation. |
| */ |
| public String getClassName() { |
| return(RUNTIME_NODE_CLASS); |
| } |
| |
| public Instruction LOAD(int slot) { |
| return new ILOAD(slot); |
| } |
| |
| public Instruction STORE(int slot) { |
| return new ISTORE(slot); |
| } |
| } |
