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Java > Open Source Codes > org > apache > slide > projector > processor > SimpleProcessor


1 /*
2  * $Header: /home/cvs/jakarta-slide/projector/src/java/org/apache/slide/projector/processor/SimpleProcessor.java,v 1.3 2004/07/28 09:48:18 ib Exp $
3  * $Revision: 1.3 $
4  * $Date: 2004/07/28 09:48:18 $
5  *
6  * ====================================================================
7  *
8  * The Apache Software License, Version 1.1
9  *
10  * Copyright (c) 1999-2002 The Apache Software Foundation. All rights
11  * reserved.
12  *
13  * Redistribution and use in source and binary forms, with or without
14  * modification, are permitted provided that the following conditions
15  * are met:
16  *
17  * 1. Redistributions of source code must retain the above copyright
18  * notice, this list of conditions and the following disclaimer.
19  *
20  * 2. Redistributions in binary form must reproduce the above copyright
21  * notice, this list of conditions and the following disclaimer in
22  * the documentation and/or other materials provided with the
23  * distribution.
24  *
25  * 3. The end-user documentation included with the redistribution, if
26  * any, must include the following acknowlegement:
27  * "This product includes software developed by the
28  * Apache Software Foundation (http://www.apache.org/)."
29  * Alternately, this acknowlegement may appear in the software itself,
30  * if and wherever such third-party acknowlegements normally appear.
31  *
32  * 4. The names "The Jakarta Project", "Slide", and "Apache Software
33  * Foundation" must not be used to endorse or promote products derived
34  * from this software without prior written permission. For written
35  * permission, please contact apache@apache.org.
36  *
37  * 5. Products derived from this software may not be called "Apache"
38  * nor may "Apache" appear in their names without prior written
39  * permission of the Apache Group.
40  *
41  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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45  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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47  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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49  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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51  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52  * SUCH DAMAGE.
53  * ====================================================================
54  *
55  * This software consists of voluntary contributions made by many
56  * individuals on behalf of the Apache Software Foundation. For more
57  * information on the Apache Software Foundation, please see
58  * <http://www.apache.org/>.
59  *
60  * [Additional notices, if required by prior licensing conditions]
61  *
62  */
63
64 package org.apache.slide.projector.processor;
65
66 import java.util.Map JavaDoc;
67
68 import org.apache.slide.projector.Context;
69 import org.apache.slide.projector.Processor;
70 import org.apache.slide.projector.Result;
71 import org.apache.slide.projector.descriptor.ParameterDescriptor;
72 import org.apache.slide.projector.descriptor.ResultDescriptor;
73 import org.apache.slide.projector.descriptor.ResultEntryDescriptor;
74 import org.apache.slide.projector.descriptor.StateDescriptor;
75 import org.apache.slide.projector.value.Value;
76
77 /**
78  * @version $Revision: 1.3 $
79  */
80
81 public abstract class SimpleProcessor implements Processor {
82     public final static String JavaDoc INPUT = "input";
83     public final static String JavaDoc OUTPUT = "output";
84
85     public abstract Value process(Value input, Context context) throws Exception JavaDoc;
86
87     public abstract ParameterDescriptor getParameterDescriptor();
88
89     public abstract ResultEntryDescriptor getResultEntryDescriptor();
90
91     public Result process(Map JavaDoc parameter, Context context) throws Exception JavaDoc {
92         Value input = (Value)parameter.get(INPUT);
93         Value output = process(input, context);
94         return new Result(StateDescriptor.OK, OUTPUT, output);
95     }
96
97     public ParameterDescriptor[] getParameterDescriptors() {
98         return new ParameterDescriptor[] { getParameterDescriptor() };
99     }
100
101     public ResultDescriptor getResultDescriptor() {
102         return new ResultDescriptor(
103                 new StateDescriptor[] { StateDescriptor.OK_DESCRIPTOR },
104                 new ResultEntryDescriptor[] {
105                     getResultEntryDescriptor()
106                 });
107     }
108 }
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