Source Code Cross Referenced for ToStringConverter.java in  » XML » xstream-1.3 » com » thoughtworks » xstream » converters » extended » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML » xstream 1.3 » com.thoughtworks.xstream.converters.extended 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * Copyright (C) 2006, 2007 XStream Committers.
03:         * All rights reserved.
04:         *
05:         * The software in this package is published under the terms of the BSD
06:         * style license a copy of which has been included with this distribution in
07:         * the LICENSE.txt file.
08:         * 
09:         * Created on 07. July 2006 by Mauro Talevi
10:         */
11:        package com.thoughtworks.xstream.converters.extended;
12:
13:        import com.thoughtworks.xstream.converters.ConversionException;
14:        import com.thoughtworks.xstream.converters.basic.AbstractSingleValueConverter;
15:
16:        import java.lang.reflect.Constructor;
17:        import java.lang.reflect.InvocationTargetException;
18:
19:        /**
20:         * Convenient converter for classes with natural string representation.
21:         * 
22:         * Converter for classes that adopt the following convention:
23:         *   - a constructor that takes a single string parameter
24:         *   - a toString() that is overloaded to issue a string that is meaningful
25:         *
26:         * @author Paul Hammant
27:         */
28:        public class ToStringConverter extends AbstractSingleValueConverter {
29:            private final Class clazz;
30:            private final Constructor ctor;
31:
32:            public ToStringConverter(Class clazz) throws NoSuchMethodException {
33:                this .clazz = clazz;
34:                ctor = clazz.getConstructor(new Class[] { String.class });
35:            }
36:
37:            public boolean canConvert(Class type) {
38:                return type.equals(clazz);
39:            }
40:
41:            public String toString(Object obj) {
42:                return obj == null ? null : obj.toString();
43:            }
44:
45:            public Object fromString(String str) {
46:                try {
47:                    return ctor.newInstance(new Object[] { str });
48:                } catch (InstantiationException e) {
49:                    throw new ConversionException(
50:                            "Unable to instantiate single String param constructor",
51:                            e);
52:                } catch (IllegalAccessException e) {
53:                    throw new ConversionException(
54:                            "Unable to access single String param constructor",
55:                            e);
56:                } catch (InvocationTargetException e) {
57:                    throw new ConversionException(
58:                            "Unable to target single String param constructor",
59:                            e.getTargetException());
60:                }
61:            }
62:        }
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