com.sun.org.apache.xalan.internal.xsltc.compiler.ApplyImports Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of org.apache.servicemix.bundles.jaxp-ri
This OSGi bundle wraps ${pkgArtifactId} ${pkgVersion} jar file.
The newest version!
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 *
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 * 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: ApplyImports.java,v 1.10 2010-11-01 04:34:15 joehw Exp $
 */
package com.sun.org.apache.xalan.internal.xsltc.compiler;

import java.util.Enumeration;

import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
import com.sun.org.apache.bcel.internal.generic.INVOKESPECIAL;
import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
import com.sun.org.apache.bcel.internal.generic.InstructionList;
import com.sun.org.apache.bcel.internal.generic.NEW;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
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;

final class ApplyImports extends Instruction {

    private QName      _modeName;
    private int        _precedence;

    public void display(int indent) {
	indent(indent);
	Util.println("ApplyTemplates");
	indent(indent + IndentIncrement);
	if (_modeName != null) {
	    indent(indent + IndentIncrement);
	    Util.println("mode " + _modeName);
	}
    }

    /**
     * Returns true if this  element has parameters
     */
    public boolean hasWithParams() {
	return hasContents();
    }

    /**
     * Determine the lowest import precedence for any stylesheet imported
     * or included by the stylesheet in which this 
     * element occured. The templates that are imported by the stylesheet in
     * which this element occured will all have higher import precedence than
     * the integer returned by this method.
     */
    private int getMinPrecedence(int max) {
        // Move to root of include tree
        Stylesheet includeRoot = getStylesheet();
        while (includeRoot._includedFrom != null) {
            includeRoot = includeRoot._includedFrom;
        }

        return includeRoot.getMinimumDescendantPrecedence();
    }

    /**
     * Parse the attributes and contents of an  element.
     */
    public void parseContents(Parser parser) {
	// Indicate to the top-level stylesheet that all templates must be
	// compiled into separate methods.
	Stylesheet stylesheet = getStylesheet();
	stylesheet.setTemplateInlining(false);

	// Get the mode we are currently in (might not be any)
	Template template = getTemplate();
	_modeName = template.getModeName();
	_precedence = template.getImportPrecedence();

	// Get the method name for  in this mode
	stylesheet = parser.getTopLevelStylesheet();

	parseChildren(parser);	// with-params
    }

    /**
     * Type-check the attributes/contents of an  element.
     */
    public Type typeCheck(SymbolTable stable) throws TypeCheckError {
	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) {
	final Stylesheet stylesheet = classGen.getStylesheet();
	final ConstantPoolGen cpg = classGen.getConstantPool();
	final InstructionList il = methodGen.getInstructionList();
	final int current = methodGen.getLocalIndex("current");

	// Push the arguments that are passed to applyTemplates()
	il.append(classGen.loadTranslet());
	il.append(methodGen.loadDOM());
    il.append(methodGen.loadIterator());
	il.append(methodGen.loadHandler());
    il.append(methodGen.loadCurrentNode());

        // Push a new parameter frame in case imported template might expect
        // parameters.  The apply-imports has nothing that it can pass.
        if (stylesheet.hasLocalParams()) {
            il.append(classGen.loadTranslet());
            final int pushFrame = cpg.addMethodref(TRANSLET_CLASS,
                                                   PUSH_PARAM_FRAME,
                                                   PUSH_PARAM_FRAME_SIG);
            il.append(new INVOKEVIRTUAL(pushFrame));
        }

	// Get the [min,max> precedence of all templates imported under the
	// current stylesheet
	final int maxPrecedence = _precedence;
	final int minPrecedence = getMinPrecedence(maxPrecedence);
	final Mode mode = stylesheet.getMode(_modeName);

        // Get name of appropriate apply-templates function for this
        // xsl:apply-imports instruction
	String functionName = mode.functionName(minPrecedence, maxPrecedence);

	// Construct the translet class-name and the signature of the method
	final String className = classGen.getStylesheet().getClassName();
	final String signature = classGen.getApplyTemplatesSigForImport();
	final int applyTemplates = cpg.addMethodref(className,
						    functionName,
						    signature);
	il.append(new INVOKEVIRTUAL(applyTemplates));

        // Pop any parameter frame that was pushed above.
        if (stylesheet.hasLocalParams()) {
            il.append(classGen.loadTranslet());
            final int pushFrame = cpg.addMethodref(TRANSLET_CLASS,
                                                   POP_PARAM_FRAME,
                                                   POP_PARAM_FRAME_SIG);
            il.append(new INVOKEVIRTUAL(pushFrame));
        }
    }

}