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1 /*******************************************************************************
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2 * Copyright (c) 2007 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 ******************************************************************************/
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11
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12 module org.eclipse.core.internal.databinding.validation.AbstractStringToNumberValidator;
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13
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14 import java.lang.all;
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15
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16 import org.eclipse.core.databinding.validation.IValidator;
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17 import org.eclipse.core.databinding.validation.ValidationStatus;
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18 import org.eclipse.core.internal.databinding.conversion.StringToNumberParser;
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19 import org.eclipse.core.internal.databinding.conversion.StringToNumberParser.ParseResult;
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20 import org.eclipse.core.runtime.IStatus;
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21 import org.eclipse.core.runtime.Status;
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22
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23 /**
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24 * Validates a number that is to be converted by a {@link NumberFormatConverter}.
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25 * Validation is comprised of parsing the String and range checks.
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26 *
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27 * @since 1.0
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28 */
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29 public abstract class AbstractStringToNumberValidator : IValidator {
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30 private final NumberFormatConverter converter;
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31 private final bool toPrimitive;
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32
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33 private final Number min;
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34 private final Number max;
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35
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36 private String outOfRangeMessage;
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37
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38 /**
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39 * Constructs a new instance.
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40 *
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41 * @param converter converter and thus formatter to be used in validation
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42 * @param min minimum value, used for reporting a range error to the user
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43 * @param max maximum value, used for reporting a range error to the user
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44 */
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45 protected this(NumberFormatConverter converter,
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46 Number min, Number max) {
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47 this.converter = converter;
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48 this.min = min;
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49 this.max = max;
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50
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51 if (null !is cast(ClassInfo)converter.getToType()) {
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52 ClassInfo clazz = cast(ClassInfo) converter.getToType();
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53 toPrimitive = clazz.isPrimitive();
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54 } else {
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55 toPrimitive = false;
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56 }
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57 }
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58
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59 /**
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60 * Validates the provided <code>value</code>. An error status is returned if:
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61 * <ul>
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62 * <li>The value cannot be parsed.</li>
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63 * <li>The value is out of range.</li>
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64 * </ul>
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65 *
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66 * @see org.eclipse.core.databinding.validation.IValidator#validate(java.lang.Object)
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67 */
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68 public final IStatus validate(Object value) {
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69 ParseResult result = StringToNumberParser.parse(value, converter
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70 .getNumberFormat(), toPrimitive);
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71
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72 if (result.getNumber() !is null) {
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73 if (!isInRange(result.getNumber())) {
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74 if (outOfRangeMessage is null) {
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75 outOfRangeMessage = StringToNumberParser
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76 .createOutOfRangeMessage(min, max, converter
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77 .getNumberFormat());
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78 }
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79
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80 return ValidationStatus.error(outOfRangeMessage);
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81 }
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82 } else if (result.getPosition() !is null) {
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83 String parseErrorMessage = StringToNumberParser.createParseErrorMessage(
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84 cast(String) value, result.getPosition());
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85
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86 return ValidationStatus.error(parseErrorMessage);
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87 }
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88
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89 return Status.OK_STATUS;
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90 }
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91
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92 /**
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93 * Invoked by {@link #validatecast(Object)} when the range is to be validated.
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94 *
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95 * @param number
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96 * @return <code>true</code> if in range
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97 */
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98 protected abstract bool isInRange(Number number);
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99 }
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