| /* |
| * 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. |
| */ |
| /* |
| * $Id$ |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import java.util.Enumeration; |
| import java.util.Vector; |
| |
| import org.apache.bcel.generic.ConstantPoolGen; |
| import org.apache.bcel.generic.INVOKESPECIAL; |
| import org.apache.bcel.generic.InstructionList; |
| import org.apache.xalan.xsltc.compiler.util.AttributeSetMethodGenerator; |
| import org.apache.xalan.xsltc.compiler.util.ClassGenerator; |
| import org.apache.xalan.xsltc.compiler.util.ErrorMsg; |
| import org.apache.xalan.xsltc.compiler.util.MethodGenerator; |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.xalan.xsltc.compiler.util.TypeCheckError; |
| import org.apache.xalan.xsltc.compiler.util.Util; |
| import org.apache.xml.utils.XML11Char; |
| |
| /** |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * @author Morten Jorgensen |
| */ |
| final class AttributeSet extends TopLevelElement { |
| |
| // This prefix is used for the method name of attribute set methods |
| private static final String AttributeSetPrefix = "$as$"; |
| |
| // Element contents |
| private QName _name; |
| private UseAttributeSets _useSets; |
| private AttributeSet _mergeSet; |
| private String _method; |
| private boolean _ignore = false; |
| |
| /** |
| * Returns the QName of this attribute set |
| */ |
| public QName getName() { |
| return _name; |
| } |
| |
| /** |
| * Returns the method name of this attribute set. This method name is |
| * generated by the compiler (XSLTC) |
| */ |
| public String getMethodName() { |
| return _method; |
| } |
| |
| /** |
| * Call this method to prevent a method for being compiled for this set. |
| * This is used in case several <xsl:attribute-set...> elements constitute |
| * a single set (with one name). The last element will merge itself with |
| * any previous set(s) with the same name and disable the other set(s). |
| */ |
| public void ignore() { |
| _ignore = true; |
| } |
| |
| /** |
| * Parse the contents of this attribute set. Recognised attributes are |
| * "name" (required) and "use-attribute-sets" (optional). |
| */ |
| public void parseContents(Parser parser) { |
| |
| // Get this attribute set's name |
| final String name = getAttribute("name"); |
| |
| if (!XML11Char.isXML11ValidQName(name)) { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.INVALID_QNAME_ERR, name, this); |
| parser.reportError(Constants.ERROR, err); |
| } |
| _name = parser.getQNameIgnoreDefaultNs(name); |
| if ((_name == null) || (_name.equals(EMPTYSTRING))) { |
| ErrorMsg msg = new ErrorMsg(ErrorMsg.UNNAMED_ATTRIBSET_ERR, this); |
| parser.reportError(Constants.ERROR, msg); |
| } |
| |
| // Get any included attribute sets (similar to inheritance...) |
| final String useSets = getAttribute("use-attribute-sets"); |
| if (useSets.length() > 0) { |
| if (!Util.isValidQNames(useSets)) { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.INVALID_QNAME_ERR, useSets, this); |
| parser.reportError(Constants.ERROR, err); |
| } |
| _useSets = new UseAttributeSets(useSets, parser); |
| } |
| |
| // Parse the contents of this node. All child elements must be |
| // <xsl:attribute> elements. Other elements cause an error. |
| final Vector contents = getContents(); |
| final int count = contents.size(); |
| for (int i=0; i<count; i++) { |
| SyntaxTreeNode child = (SyntaxTreeNode)contents.elementAt(i); |
| if (child instanceof XslAttribute) { |
| parser.getSymbolTable().setCurrentNode(child); |
| child.parseContents(parser); |
| } |
| else if (child instanceof Text) { |
| // ignore |
| } |
| else { |
| ErrorMsg msg = new ErrorMsg(ErrorMsg.ILLEGAL_CHILD_ERR, this); |
| parser.reportError(Constants.ERROR, msg); |
| } |
| } |
| |
| // Point the symbol table back at us... |
| parser.getSymbolTable().setCurrentNode(this); |
| } |
| |
| /** |
| * Type check the contents of this element |
| */ |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| |
| if (_ignore) return (Type.Void); |
| |
| // _mergeSet Point to any previous definition of this attribute set |
| _mergeSet = stable.addAttributeSet(this); |
| |
| _method = AttributeSetPrefix + getXSLTC().nextAttributeSetSerial(); |
| |
| if (_useSets != null) _useSets.typeCheck(stable); |
| typeCheckContents(stable); |
| return Type.Void; |
| } |
| |
| /** |
| * Compile a method that outputs the attributes in this set |
| */ |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| |
| if (_ignore) return; |
| |
| // Create a new method generator for an attribute set method |
| methodGen = new AttributeSetMethodGenerator(_method, classGen); |
| |
| // Generate a reference to previous attribute-set definitions with the |
| // same name first. Those later in the stylesheet take precedence. |
| if (_mergeSet != null) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| final String methodName = _mergeSet.getMethodName(); |
| |
| il.append(classGen.loadTranslet()); |
| il.append(methodGen.loadDOM()); |
| il.append(methodGen.loadIterator()); |
| il.append(methodGen.loadHandler()); |
| final int method = cpg.addMethodref(classGen.getClassName(), |
| methodName, ATTR_SET_SIG); |
| il.append(new INVOKESPECIAL(method)); |
| } |
| |
| // Translate other used attribute sets first, as local attributes |
| // take precedence (last attributes overrides first) |
| if (_useSets != null) _useSets.translate(classGen, methodGen); |
| |
| // Translate all local attributes |
| final Enumeration attributes = elements(); |
| while (attributes.hasMoreElements()) { |
| SyntaxTreeNode element = (SyntaxTreeNode)attributes.nextElement(); |
| if (element instanceof XslAttribute) { |
| final XslAttribute attribute = (XslAttribute)element; |
| attribute.translate(classGen, methodGen); |
| } |
| } |
| final InstructionList il = methodGen.getInstructionList(); |
| il.append(RETURN); |
| |
| classGen.addMethod(methodGen); |
| } |
| |
| public String toString() { |
| StringBuffer buf = new StringBuffer("attribute-set: "); |
| // Translate all local attributes |
| final Enumeration attributes = elements(); |
| while (attributes.hasMoreElements()) { |
| final XslAttribute attribute = |
| (XslAttribute)attributes.nextElement(); |
| buf.append(attribute); |
| } |
| return(buf.toString()); |
| } |
| } |