Mercurial > hg > blitz_condensed
view src/com/go/trove/classfile/MethodDescriptor.java @ 28:4b2f23b6feca
Add a schema compatibility check to indexer that parallels storage.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 12 Jun 2010 10:11:15 +0100 |
parents | 3dc0c5604566 |
children |
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/* ==================================================================== * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group * ==================================================================== * The Tea Software License, Version 1.1 * * Copyright (c) 2000 Walt Disney Internet Group. 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 * Walt Disney Internet Group (http://opensource.go.com/)." * Alternately, this acknowledgment may appear in the software itself, * if and wherever such third-party acknowledgments normally appear. * * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must * not be used to endorse or promote products derived from this * software without prior written permission. For written * permission, please contact opensource@dig.com. * * 5. Products derived from this software may not be called "Tea", * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet", * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior * written permission of the Walt Disney Internet Group. * * 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 WALT DISNEY INTERNET GROUP 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. * ==================================================================== * * For more information about Tea, please see http://opensource.go.com/. */ package com.go.trove.classfile; import java.util.List; import java.util.ArrayList; /****************************************************************************** * This class is used to build method descriptor strings as * defined in <i>The Java Virtual Machine Specification</i>, section 4.3.3. * * @author Brian S O'Neill * @version * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 9/07/00 <!-- $--> */ public class MethodDescriptor extends Descriptor { private static TypeDescriptor[] cEmptyParams = new TypeDescriptor[0]; private String mStr; private TypeDescriptor mRetType; private TypeDescriptor[] mParams; public MethodDescriptor() { this(null, null); } /** * Used to construct a method descriptor for a method with a return * type and parameters. */ public MethodDescriptor(TypeDescriptor ret, TypeDescriptor[] params) { if (params == null) { params = cEmptyParams; } mStr = generate(ret, params); mRetType = ret; mParams = params; } public TypeDescriptor getReturnType() { return mRetType; } public int getParameterCount() { return mParams.length; } public TypeDescriptor[] getParameterTypes() { return mParams; } public String toString() { return mStr; } public static String generate() { return generate(null, null); } /** * Used to generate a method descriptor for a method with a return * type and parameters. */ public static String generate(TypeDescriptor ret, TypeDescriptor[] params) { StringBuffer desc = new StringBuffer(20); desc.append('('); if (params != null) { for (int i=0; i<params.length; i++) { desc.append(params[i]); } } desc.append(')'); if (ret == null) ret = new TypeDescriptor(Void.TYPE); desc.append(ret); return desc.toString(); } public static MethodDescriptor parseMethodDesc(String desc) throws IllegalArgumentException { MethodDescriptor md; int cursor = 0; try { char c; if ((c = desc.charAt(cursor++)) != '(') { throw new IllegalArgumentException ("Invalid descriptor: " + desc); } StringBuffer buf = new StringBuffer(); List list = new ArrayList(); while ((c = desc.charAt(cursor++)) != ')') { switch (c) { case 'V': case 'I': case 'C': case 'Z': case 'D': case 'F': case 'J': case 'B': case 'S': buf.append(c); break; case '[': buf.append(c); continue; case 'L': while (true) { buf.append(c); if (c == ';') { break; } c = desc.charAt(cursor++); } break; default: throw new IllegalArgumentException ("Invalid descriptor: " + desc); } list.add(TypeDescriptor.parseTypeDesc(buf.toString())); buf.setLength(0); } TypeDescriptor ret = TypeDescriptor.parseTypeDesc(desc.substring(cursor)); TypeDescriptor[] tds = new TypeDescriptor[list.size()]; tds = (TypeDescriptor[])list.toArray(tds); md = new MethodDescriptor(ret, tds); } catch (NullPointerException e) { throw new IllegalArgumentException("Invalid descriptor: " + desc); } catch (IndexOutOfBoundsException e) { throw new IllegalArgumentException("Invalid descriptor: " + desc); } return md; } }