jaxp/src/java.xml/share/classes/com/sun/org/apache/xalan/internal/xsltc/compiler/UnparsedEntityUriCall.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
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 * this work for additional information regarding copyright ownership.
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 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
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 *      http://www.apache.org/licenses/LICENSE-2.0
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package com.sun.org.apache.xalan.internal.xsltc.compiler;

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.InstructionList;
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.StringType;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;

/**
 * @author Jacek Ambroziak
 * @author Santiago Pericas-Geertsen
 * @author Morten Jorgensen
 */
final class UnparsedEntityUriCall extends FunctionCall {
    private Expression _entity;

    public UnparsedEntityUriCall(QName fname, Vector arguments) {
        super(fname, arguments);
        _entity = argument();
    }

    public Type typeCheck(SymbolTable stable) throws TypeCheckError {
        final Type entity = _entity.typeCheck(stable);
        if (entity instanceof StringType == false) {
            _entity = new CastExpr(_entity, Type.String);
        }
        return _type = Type.String;
    }

    public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
        final ConstantPoolGen cpg = classGen.getConstantPool();
        final InstructionList il = methodGen.getInstructionList();
        // Feck the this pointer on the stack...
        il.append(methodGen.loadDOM());
        // ...then the entity name...
        _entity.translate(classGen, methodGen);
        // ...to get the URI from the DOM object.
        il.append(new INVOKEINTERFACE(
                         cpg.addInterfaceMethodref(DOM_INTF,
                                                   GET_UNPARSED_ENTITY_URI,
                                                   GET_UNPARSED_ENTITY_URI_SIG),
                         2));
    }
}