/*

 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

 */

/*

 * 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;

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.InstructionList;

import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;

import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;

import java.util.List;

/**

 * @author Morten Jorgensen

 * @LastModified: Oct 2017

 */

final class NamespaceUriCall extends NameBase {

    /**

     * Handles calls with no parameter (current node is implicit parameter).

     */

    public NamespaceUriCall(QName fname) {

        super(fname);

    }

    /**

     * Handles calls with one parameter (either node or node-set).

     */

    public NamespaceUriCall(QName fname, List<Expression> arguments) {

        super(fname, arguments);

    }

    /**

     * Translate code that leaves a node's namespace URI (as a String)

     * on the stack

     */

    public void translate(ClassGenerator classGen,

                          MethodGenerator methodGen) {

        final ConstantPoolGen cpg = classGen.getConstantPool();

        final InstructionList il = methodGen.getInstructionList();

        // Returns the string value for a node in the DOM

        final int getNamespace = cpg.addInterfaceMethodref(DOM_INTF,

                                                           "getNamespaceName",

                                                           "(I)"+STRING_SIG);

        super.translate(classGen, methodGen);

        il.append(new INVOKEINTERFACE(getNamespace, 2));

    }

}