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comparison org.eclipse.core.databinding/src/org/eclipse/core/internal/databinding/validation/NumberToNumberValidator.d @ 78:0a55d2d5a946

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Added file for databinding
author Frank Benoit <benoit@tionex.de>
date Tue, 14 Apr 2009 11:35:29 +0200
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76:f05e6e8b2f2d 78:0a55d2d5a946
1 /*******************************************************************************
2 * Copyright (c) 2007 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 ******************************************************************************/
11
12 module org.eclipse.core.internal.databinding.validation.NumberToNumberValidator;
13
14 import java.lang.all;
15
16 import org.eclipse.core.databinding.validation.IValidator;
17 import org.eclipse.core.databinding.validation.ValidationStatus;
18 import org.eclipse.core.internal.databinding.conversion.NumberToNumberConverter;
19 import org.eclipse.core.internal.databinding.conversion.StringToNumberParser;
20 import org.eclipse.core.runtime.IStatus;
21 import org.eclipse.core.runtime.Status;
22
23 /**
24 * Base class for validators that validate if a Number can fit in another Number type.
25 * <p>
26 * Class is thread safe.
27 * </p>
28 *
29 * @since 1.0
30 */
31 public abstract class NumberToNumberValidator : IValidator {
32 private final NumberToNumberConverter converter;
33
34 private final Number min;
35
36 private final Number max;
37
38 private String outOfRangeMessage;
39
40 private final bool primitive;
41
42 /**
43 * @param converter
44 * @param min
45 * can be <code>null</code>
46 * @param max
47 * can be <code>null</code>
48 */
49 protected this(NumberToNumberConverter converter,
50 Number min, Number max) {
51 this.converter = converter;
52 this.min = min;
53 this.max = max;
54
55 primitive = (cast(ClassInfo) converter.getToType()).isPrimitive();
56 }
57
58 /*
59 * (non-Javadoc)
60 *
61 * @see org.eclipse.core.databinding.validation.IValidator#validate(java.lang.Object)
62 */
63 public final IStatus validate(Object value) {
64 if (value is null) {
65 if (primitive) {
66 throw new IllegalArgumentException(
67 "Parameter 'value' cannot be null."); //$NON-NLS-1$
68 }
69
70 return Status.OK_STATUS;
71 }
72
73 if (!( null !is cast(Number)value )) {
74 throw new IllegalArgumentException(
75 "Parameter 'value' is not of type Number."); //$NON-NLS-1$
76 }
77
78 Number number = cast(Number) value;
79 if (inRange(number)) {
80 return Status.OK_STATUS;
81 }
82
83 synchronized (this) {
84 if (outOfRangeMessage is null && min !is null && max !is null) {
85 outOfRangeMessage = StringToNumberParser
86 .createOutOfRangeMessage(min, max, converter
87 .getNumberFormat());
88 }
89
90 return ValidationStatus.error(outOfRangeMessage);
91 }
92 }
93
94 /**
95 * Invoked to determine if the value is in range.
96 *
97 * @param number
98 * @return <code>true</code> if in range
99 */
100 protected abstract bool inRange(Number number);
101 }