01: //--------------------------------------------------------------------------
02: // Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
03: // All rights reserved.
04: //
05: // Redistribution and use in source and binary forms, with or without
06: // modification, are permitted provided that the following conditions are
07: // met:
08: //
09: // Redistributions of source code must retain the above copyright notice,
10: // this list of conditions and the following disclaimer.
11: // Redistributions in binary form must reproduce the above copyright
12: // notice, this list of conditions and the following disclaimer in the
13: // documentation and/or other materials provided with the distribution.
14: // Neither the name of the Drew Davidson nor the names of its contributors
15: // may be used to endorse or promote products derived from this software
16: // without specific prior written permission.
17: //
18: // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19: // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20: // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21: // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22: // COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23: // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24: // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
25: // OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26: // AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27: // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
28: // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
29: // DAMAGE.
30: //--------------------------------------------------------------------------
31: package ognl;
32:
33: import java.lang.reflect.Member;
34: import java.util.Map;
35:
36: /**
37: * Interface for accessing the type conversion facilities within a context.
38: * @author Luke Blanshard (blanshlu@netscape.net)
39: * @author Drew Davidson (drew@ognl.org)
40: */
41: public interface TypeConverter {
42: /**
43: * Converts the given value to a given type. The OGNL context, target, member and
44: * name of property being set are given. This method should be able to handle
45: * conversion in general without any context, target, member or property name specified.
46: * @param context OGNL context under which the conversion is being done
47: * @param target target object in which the property is being set
48: * @param member member (Constructor, Method or Field) being set
49: * @param propertyName property name being set
50: * @param value value to be converted
51: * @param toType type to which value is converted
52: * @return Converted value of type toType or TypeConverter.NoConversionPossible to indicate that the
53: conversion was not possible.
54: */
55: public Object convertValue(Map context, Object target,
56: Member member, String propertyName, Object value,
57: Class toType);
58: }
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