FileDocCategorySizeDatePackage
ApplyTemplates.javaAPI DocJava SE 5 API6916Fri Aug 26 14:55:34 BST 2005com.sun.org.apache.xalan.internal.xsltc.compiler

ApplyTemplates

public final class ApplyTemplates extends Instruction
author
Jacek Ambroziak
author
Santiago Pericas-Geertsen

Fields Summary
private Expression
_select
private Type
_type
private QName
_modeName
private String
_functionName
Constructors Summary
Methods Summary
public voiddisplay(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 booleanhasWithParams()

	return hasContents();
public voidparseContents(com.sun.org.apache.xalan.internal.xsltc.compiler.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 voidtranslate(com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator classGen, com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator methodGen)
Translate call-template. A parameter frame is pushed only if some template in the stylesheet uses parameters.

	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));
	}
public com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypetypeCheck(com.sun.org.apache.xalan.internal.xsltc.compiler.SymbolTable stable)

	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;
	}