| /* gnu.java.beans.decoder.IndexContext |
| Copyright (C) 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package gnu.java.beans.decoder; |
| |
| /** IndexContext is Context implementation that senses whether it is an indexed get or set |
| * operation and invokes this operation. |
| * |
| * <p>An IndexContent is a get operation when no argument is provided and a set operation if one |
| * argument is provided.</p> |
| * |
| * @author Robert Schuster |
| */ |
| class IndexContext extends AbstractContext |
| { |
| private Object result; |
| private Object argument; |
| private int index; |
| private boolean isSetter; |
| |
| IndexContext(String id, int newIndex) |
| { |
| setId(id); |
| index = newIndex; |
| } |
| |
| /* (non-Javadoc) |
| * @see gnu.java.beans.decoder.Context#addObject(java.lang.Object) |
| */ |
| public void addParameterObject(Object o) throws AssemblyException |
| { |
| if (! isSetter) |
| { |
| argument = o; |
| isSetter = true; |
| } |
| else |
| throw new AssemblyException(new IllegalStateException("More than one argument for indiced access is not possible.")); |
| } |
| |
| /* (non-Javadoc) |
| * @see gnu.java.beans.decoder.Context#reportStatement() |
| */ |
| public void notifyStatement(Context outerContext) throws AssemblyException |
| { |
| throw new AssemblyException(new IllegalStateException("Statements inside indiced access are not allowed.")); |
| } |
| |
| /* (non-Javadoc) |
| * @see gnu.java.beans.decoder.Context#endContext(gnu.java.beans.decoder.Context) |
| */ |
| public Object endContext(Context outerContext) throws AssemblyException |
| { |
| if (isSetter) |
| { |
| // setter |
| outerContext.set(index, argument); |
| |
| return null; |
| } |
| else |
| // getter |
| return result = outerContext.get(index); |
| } |
| |
| /* (non-Javadoc) |
| * @see gnu.java.beans.decoder.Context#subContextFailed() |
| */ |
| public boolean subContextFailed() |
| { |
| // returns true to indicate that indiced access assembly fails when one of its |
| // argument could not be assembled |
| return true; |
| } |
| |
| /* (non-Javadoc) |
| * @see gnu.java.beans.decoder.Context#set(int, java.lang.Object) |
| */ |
| public void set(int index, Object o) throws AssemblyException |
| { |
| throw new AssemblyException(new IllegalStateException("Setter is not allowed inside indiced access.")); |
| } |
| |
| /* (non-Javadoc) |
| * @see gnu.java.beans.decoder.Context#get(int) |
| */ |
| public Object get(int index) throws AssemblyException |
| { |
| throw new AssemblyException(new IllegalStateException("getter is not allowed insided indiced access.")); |
| } |
| |
| public Object getResult() |
| { |
| return result; |
| } |
| } |