| /* |
| * @(#)$Id$ |
| * |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2001-2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 2001, Sun |
| * Microsystems., http://www.sun.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * @author Todd Miller |
| * @author Santiago Pericas-Geertsen |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.compiler.util; |
| |
| import org.apache.bcel.generic.ALOAD; |
| import org.apache.bcel.generic.ASTORE; |
| import org.apache.bcel.generic.BranchHandle; |
| import org.apache.bcel.generic.ConstantPoolGen; |
| import org.apache.bcel.generic.GOTO; |
| import org.apache.bcel.generic.IFNULL; |
| import org.apache.bcel.generic.INVOKEVIRTUAL; |
| import org.apache.bcel.generic.Instruction; |
| import org.apache.bcel.generic.InstructionList; |
| import org.apache.bcel.generic.PUSH; |
| import org.apache.xalan.xsltc.compiler.Constants; |
| |
| |
| public final class ObjectType extends Type { |
| |
| private String _javaClassName = "java.lang.Object"; |
| private Class _clazz = java.lang.Object.class; |
| |
| /** |
| * Used to represent a Java Class type such is required to support |
| * non-static java functions. |
| * @param javaClassName name of the class such as 'com.foo.Processor' |
| */ |
| protected ObjectType(String javaClassName) { |
| _javaClassName = javaClassName; |
| |
| try { |
| _clazz = ObjectFactory.findProviderClass( |
| javaClassName, ObjectFactory.findClassLoader(), true); |
| } |
| catch (ClassNotFoundException e) { |
| _clazz = null; |
| } |
| } |
| |
| protected ObjectType(Class clazz) { |
| _clazz = clazz; |
| _javaClassName = clazz.getName(); |
| } |
| |
| public int hashCode() { |
| return toString().hashCode(); |
| } |
| |
| public boolean equals(Object obj) { |
| return (obj instanceof ObjectType); |
| } |
| |
| public String getJavaClassName() { |
| return _javaClassName; |
| } |
| |
| public Class getJavaClass() { |
| return _clazz; |
| } |
| |
| public String toString() { |
| return _javaClassName; |
| } |
| |
| public boolean identicalTo(Type other) { |
| return this == other; |
| } |
| |
| public String toSignature() { |
| final StringBuffer result = new StringBuffer("L"); |
| result.append(_javaClassName.replace('.', '/')).append(';'); |
| return result.toString(); |
| } |
| |
| public org.apache.bcel.generic.Type toJCType() { |
| return Util.getJCRefType(toSignature()); |
| } |
| |
| /** |
| * Translates a void into an object of internal type <code>type</code>. |
| * This translation is needed when calling external functions |
| * that return void. |
| * |
| * @see org.apache.xalan.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| Type type) { |
| if (type == Type.String) { |
| translateTo(classGen, methodGen, (StringType) type); |
| } |
| else { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR, |
| toString(), type.toString()); |
| classGen.getParser().reportError(Constants.FATAL, err); |
| } |
| } |
| |
| /** |
| * Expects an integer on the stack and pushes its string value by calling |
| * <code>Integer.toString(int i)</code>. |
| * |
| * @see org.apache.xalan.xsltc.compiler.util.Type#translateTo |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| StringType type) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| il.append(DUP); |
| final BranchHandle ifNull = il.append(new IFNULL(null)); |
| il.append(new INVOKEVIRTUAL(cpg.addMethodref(_javaClassName, |
| "toString", |
| "()" + STRING_SIG))); |
| final BranchHandle gotobh = il.append(new GOTO(null)); |
| ifNull.setTarget(il.append(POP)); |
| il.append(new PUSH(cpg, "")); |
| gotobh.setTarget(il.append(NOP)); |
| } |
| |
| /** |
| * Translates an object of this type to the external (Java) type denoted |
| * by <code>clazz</code>. This method is used to translate parameters |
| * when external functions are called. |
| */ |
| public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, |
| Class clazz) { |
| if (clazz.isAssignableFrom(_clazz)) |
| methodGen.getInstructionList().append(NOP); |
| else { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR, |
| toString(), clazz.getClass().toString()); |
| classGen.getParser().reportError(Constants.FATAL, err); |
| } |
| } |
| |
| /** |
| * Translates an external Java type into an Object type |
| */ |
| public void translateFrom(ClassGenerator classGen, |
| MethodGenerator methodGen, Class clazz) { |
| methodGen.getInstructionList().append(NOP); |
| } |
| |
| public Instruction LOAD(int slot) { |
| return new ALOAD(slot); |
| } |
| |
| public Instruction STORE(int slot) { |
| return new ASTORE(slot); |
| } |
| } |