- /*
- * Copyright 2001-2004 The Apache Software Foundation.
- *
- * Licensed 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: LangCall.java,v 1.5 2004/02/16 22:24:29 minchau Exp $
- */
-
- 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.ILOAD;
- import com.sun.org.apache.bcel.internal.generic.INVOKESTATIC;
- 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.FilterGenerator;
- 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 Morten Jorgensen
- */
- final class LangCall extends FunctionCall {
- private Expression _lang;
- private Type _langType;
-
- /**
- * Get the parameters passed to function:
- * lang(string)
- */
- public LangCall(QName fname, Vector arguments) {
- super(fname, arguments);
- _lang = argument(0);
- }
-
- /**
- *
- */
- public Type typeCheck(SymbolTable stable) throws TypeCheckError {
- _langType = _lang.typeCheck(stable);
- if (!(_langType instanceof StringType)) {
- _lang = new CastExpr(_lang, Type.String);
- }
- return Type.Boolean;
- }
-
- /**
- *
- */
- public Type getType() {
- return(Type.Boolean);
- }
-
- /**
- * This method is called when the constructor is compiled in
- * Stylesheet.compileConstructor() and not as the syntax tree is traversed.
- */
- public void translate(ClassGenerator classGen,
- MethodGenerator methodGen) {
- final ConstantPoolGen cpg = classGen.getConstantPool();
- final InstructionList il = methodGen.getInstructionList();
-
- final int tst = cpg.addMethodref(BASIS_LIBRARY_CLASS,
- "testLanguage",
- "("+STRING_SIG+DOM_INTF_SIG+"I)Z");
- _lang.translate(classGen,methodGen);
- il.append(methodGen.loadDOM());
- if (classGen instanceof FilterGenerator)
- il.append(new ILOAD(1));
- else
- il.append(methodGen.loadContextNode());
- il.append(new INVOKESTATIC(tst));
- }
- }