- /*
- * 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: ApplyTemplates.java,v 1.21 2004/02/24 03:55:47 zongaro Exp $
- */
-
- package com.sun.org.apache.xalan.internal.xsltc.compiler;
-
- import java.util.Enumeration;
- import java.util.Vector;
-
- import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
- import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
- import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
- import com.sun.org.apache.bcel.internal.generic.InstructionList;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NodeSetType;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NodeType;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ReferenceType;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ResultTreeType;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
- import com.sun.org.apache.xml.internal.utils.XMLChar;
-
- /**
- * @author Jacek Ambroziak
- * @author Santiago Pericas-Geertsen
- */
- final class ApplyTemplates extends Instruction {
- private Expression _select;
- private Type _type = null;
- private QName _modeName;
- private String _functionName;
-
- public void display(int indent) {
- indent(indent);
- Util.println("ApplyTemplates");
- indent(indent + IndentIncrement);
- Util.println("select " + _select.toString());
- if (_modeName != null) {
- indent(indent + IndentIncrement);
- Util.println("mode " + _modeName);
- }
- }
-
- public boolean hasWithParams() {
- return hasContents();
- }
-
- public void parseContents(Parser parser) {
- final String select = getAttribute("select");
- final String mode = getAttribute("mode");
-
- if (select.length() > 0) {
- _select = parser.parseExpression(this, "select", null);
-
- }
-
- if (mode.length() > 0) {
- if (!XMLChar.isValidQName(mode)) {
- ErrorMsg err = new ErrorMsg(ErrorMsg.INVALID_QNAME_ERR, mode, this);
- parser.reportError(Constants.ERROR, err);
- }
- _modeName = parser.getQNameIgnoreDefaultNs(mode);
- }
-
- // instantiate Mode if needed, cache (apply temp) function name
- _functionName =
- parser.getTopLevelStylesheet().getMode(_modeName).functionName();
- parseChildren(parser);// with-params
- }
-
- public Type typeCheck(SymbolTable stable) throws TypeCheckError {
- if (_select != null) {
- _type = _select.typeCheck(stable);
- if (_type instanceof NodeType || _type instanceof ReferenceType) {
- _select = new CastExpr(_select, Type.NodeSet);
- _type = Type.NodeSet;
- }
- if (_type instanceof NodeSetType||_type instanceof ResultTreeType) {
- typeCheckContents(stable); // with-params
- return Type.Void;
- }
- throw new TypeCheckError(this);
- }
- else {
- typeCheckContents(stable); // with-params
- return Type.Void;
- }
- }
-
- /**
- * Translate call-template. A parameter frame is pushed only if
- * some template in the stylesheet uses parameters.
- */
- public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
- boolean setStartNodeCalled = false;
- final Stylesheet stylesheet = classGen.getStylesheet();
- final ConstantPoolGen cpg = classGen.getConstantPool();
- final InstructionList il = methodGen.getInstructionList();
- final int current = methodGen.getLocalIndex("current");
-
- // check if sorting nodes is required
- final Vector sortObjects = new Vector();
- final Enumeration children = elements();
- while (children.hasMoreElements()) {
- final Object child = children.nextElement();
- if (child instanceof Sort) {
- sortObjects.addElement(child);
- }
- }
-
- // Push a new parameter frame
- if (stylesheet.hasLocalParams() || hasContents()) {
- il.append(classGen.loadTranslet());
- final int pushFrame = cpg.addMethodref(TRANSLET_CLASS,
- PUSH_PARAM_FRAME,
- PUSH_PARAM_FRAME_SIG);
- il.append(new INVOKEVIRTUAL(pushFrame));
- // translate with-params
- translateContents(classGen, methodGen);
- }
-
-
- il.append(classGen.loadTranslet());
-
- // The 'select' expression is a result-tree
- if ((_type != null) && (_type instanceof ResultTreeType)) {
- // <xsl:sort> cannot be applied to a result tree - issue warning
- if (sortObjects.size() > 0) {
- ErrorMsg err = new ErrorMsg(ErrorMsg.RESULT_TREE_SORT_ERR,this);
- getParser().reportError(WARNING, err);
- }
- // Put the result tree (a DOM adapter) on the stack
- _select.translate(classGen, methodGen);
- // Get back the DOM and iterator (not just iterator!!!)
- _type.translateTo(classGen, methodGen, Type.NodeSet);
- }
- else {
- il.append(methodGen.loadDOM());
-
- // compute node iterator for applyTemplates
- if (sortObjects.size() > 0) {
- Sort.translateSortIterator(classGen, methodGen,
- _select, sortObjects);
- int setStartNode = cpg.addInterfaceMethodref(NODE_ITERATOR,
- SET_START_NODE,
- "(I)"+
- NODE_ITERATOR_SIG);
- il.append(methodGen.loadCurrentNode());
- il.append(new INVOKEINTERFACE(setStartNode,2));
- setStartNodeCalled = true;
- }
- else {
- if (_select == null)
- Mode.compileGetChildren(classGen, methodGen, current);
- else
- _select.translate(classGen, methodGen);
- }
- }
-
- if (_select != null && !setStartNodeCalled) {
- _select.startIterator(classGen, methodGen);
- }
-
- //!!! need to instantiate all needed modes
- final String className = classGen.getStylesheet().getClassName();
- il.append(methodGen.loadHandler());
- final String applyTemplatesSig = classGen.getApplyTemplatesSig();
- final int applyTemplates = cpg.addMethodref(className,
- _functionName,
- applyTemplatesSig);
- il.append(new INVOKEVIRTUAL(applyTemplates));
-
- // Pop parameter frame
- if (stylesheet.hasLocalParams() || hasContents()) {
- il.append(classGen.loadTranslet());
- final int popFrame = cpg.addMethodref(TRANSLET_CLASS,
- POP_PARAM_FRAME,
- POP_PARAM_FRAME_SIG);
- il.append(new INVOKEVIRTUAL(popFrame));
- }
- }
- }