blob: fa75a12f9419523e292a06862bedf4725b95104b (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
/*******************************************************************************
* Copyright (c) 2006 Oracle Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Cameron Bateman/Oracle - initial API and implementation
*
********************************************************************************/
package org.eclipse.jst.jsf.common.internal.types;
import org.eclipse.jdt.core.Signature;
/**
* Coercer for simple type signatures
*
* @author cbateman
*
*/
public class TypeCoercer
{
/**
* Based on JSP.2.8.3 in JSP 2.0 specification
*
* @param boxedTypeSignature -- an auto-boxed type signature
* @return the coerced type or null if cannot be resolved. No unboxing
* is performed on the return.
* @throws TypeCoercionException if boxedTypeSignature is
*/
public static String coerceToNumber(final String boxedTypeSignature)
throws TypeCoercionException
{
String boxedTypeSignature_ = boxedTypeSignature;
// can't coerce arrays to numbers
if (Signature.getTypeSignatureKind(boxedTypeSignature_)
== Signature.ARRAY_TYPE_SIGNATURE)
{
throw new TypeCoercionException("Cannot coerce arrays to numbers"); //$NON-NLS-1$
}
// if it's character, pre-coerce to short per step 2
if (TypeConstants.SIGNATURE_BOXED_CHARACTER.equals(boxedTypeSignature))
{
boxedTypeSignature_ = TypeConstants.TYPE_BOXED_SHORT;
}
if (TypeCoercer.typeIsNumeric(boxedTypeSignature_)
|| TypeCoercer.typeIsNull(boxedTypeSignature_))
{
return boxedTypeSignature_;
}
else if (typeIsString(boxedTypeSignature_))
{
// undetermined a string may or not resolve to a number
// depending on its runtime value
return null;
}
else
{
throw new TypeCoercionException();
}
}
/**
* @param boxedTypeSignature
* @return true if type can be coerced to boolean; null if indeterminate
*/
public static boolean canCoerceToBoolean(String boxedTypeSignature)
{
// JSP.2.8.5 -- boolean is always boolean; string is converted by Boolean.valueOf(String)
if (typeIsBoolean(boxedTypeSignature)
|| typeIsString(boxedTypeSignature)
|| typeIsNull(boxedTypeSignature))
{
return true;
}
// nothing else really convertible besides null
return false;
}
/**
* @param typeSignature -- boxed type signature
* @return true if the typeSignature is numeric
*/
public static boolean typeIsNumeric(final String typeSignature)
{
return (TypeConstants.TYPE_BOXED_BYTE.equals(typeSignature) ||
TypeConstants.TYPE_BOXED_SHORT.equals(typeSignature) ||
TypeConstants.TYPE_BOXED_INTEGER.equals(typeSignature) ||
TypeConstants.TYPE_BOXED_LONG.equals(typeSignature) ||
TypeConstants.TYPE_BOXED_FLOAT.equals(typeSignature) ||
TypeConstants.TYPE_BOXED_DOUBLE.equals(typeSignature) ||
TypeConstants.TYPE_BIG_INTEGER.equals(typeSignature) ||
TypeConstants.TYPE_BIG_DOUBLE.equals(typeSignature));
}
/**
* @param typeSignature
* @return true if the typeSignature represents a String
*/
public static boolean typeIsString(final String typeSignature)
{
return (TypeConstants.TYPE_STRING.equals(typeSignature));
}
/**
* @param typeSignature -- boxed type signature
* @return true if the typeSignature represents a boxed boolean
*/
public static boolean typeIsBoolean(final String typeSignature)
{
return (TypeConstants.TYPE_BOXED_BOOLEAN.equals(typeSignature));
}
/**
* @param typeSignature
* @return true if type is the EL null type
*/
public static boolean typeIsNull(final String typeSignature)
{
return (TypeConstants.TYPE_NULL.equals(typeSignature));
}
}
|
