Coverage report

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org.apache.commons.validator.routines.BigDecimalValidator
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 1  
 /*
 2  
  * $Id: BigDecimalValidator.java 386637 2006-03-17 13:22:26Z niallp $
 3  
  * $Revision: 386637 $
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  * $Date: 2006-03-17 13:22:26 +0000 (Fri, 17 Mar 2006) $
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  *
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  * ====================================================================
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  * Copyright 2006 The Apache Software Foundation
 8  
  *
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  * Licensed under the Apache License, Version 2.0 (the "License");
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  * you may not use this file except in compliance with the License.
 11  
  * You may obtain a copy of the License at
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  *
 13  
  *     http://www.apache.org/licenses/LICENSE-2.0
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  *
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  * Unless required by applicable law or agreed to in writing, software
 16  
  * distributed under the License is distributed on an "AS IS" BASIS,
 17  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 18  
  * See the License for the specific language governing permissions and
 19  
  * limitations under the License.
 20  
  */
 21  
 package org.apache.commons.validator.routines;
 22  
 
 23  
 import java.math.BigDecimal;
 24  
 import java.text.Format;
 25  
 import java.text.NumberFormat;
 26  
 import java.util.Locale;
 27  
 
 28  
 /**
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  * <p><b>BigDecimal Validation</b> and Conversion routines (<code>java.math.BigDecimal</code>).</p>
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  *
 31  
  * <p>This validator provides a number of methods for
 32  
  *    validating/converting a <code>String</code> value to
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  *    a <code>BigDecimal</code> using <code>java.text.NumberFormat</code>
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  *    to parse either:</p>
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  *    <ul>
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  *       <li>using the default format for the default <code>Locale</code></li>
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  *       <li>using a specified pattern with the default <code>Locale</code></li>
 38  
  *       <li>using the default format for a specified <code>Locale</code></li>
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  *       <li>using a specified pattern with a specified <code>Locale</code></li>
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  *    </ul>
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  *    
 42  
  * <p>Use one of the <code>isValid()</code> methods to just validate or
 43  
  *    one of the <code>validate()</code> methods to validate and receive a
 44  
  *    <i>converted</i> <code>BigDecimal</code> value.</p>
 45  
  * 
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  * <p>Fraction/decimal values are automatically trimmed to the appropriate length.</p>
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  * 
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  * <p>Once a value has been sucessfully converted the following
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  *    methods can be used to perform minimum, maximum and range checks:</p>
 50  
  *    <ul>
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  *       <li><code>minValue()</code> checks whether the value is greater
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  *           than or equal to a specified minimum.</li>
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  *       <li><code>maxValue()</code> checks whether the value is less
 54  
  *           than or equal to a specified maximum.</li>
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  *       <li><code>isInRange()</code> checks whether the value is within
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  *           a specified range of values.</li>
 57  
  *    </ul>
 58  
  * 
 59  
  * <p>So that the same mechanism used for parsing an <i>input</i> value 
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  *    for validation can be used to format <i>output</i>, corresponding
 61  
  *    <code>format()</code> methods are also provided. That is you can 
 62  
  *    format either:</p>
 63  
  *    <ul>
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  *       <li>using the default format for the default <code>Locale</code></li>
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  *       <li>using a specified pattern with the default <code>Locale</code></li>
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  *       <li>using the default format for a specified <code>Locale</code></li>
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  *       <li>using a specified pattern with a specified <code>Locale</code></li>
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  *    </ul>
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  * 
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  * @version $Revision: 386637 $ $Date: 2006-03-17 13:22:26 +0000 (Fri, 17 Mar 2006) $
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  * @since Validator 1.3.0
 72  
  */
 73  
 public class BigDecimalValidator extends AbstractNumberValidator {
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 75  3
     private static final BigDecimalValidator VALIDATOR = new BigDecimalValidator();
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 77  
     /**
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      * Return a singleton instance of this validator.
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      * @return A singleton instance of the BigDecimalValidator.
 80  
      */
 81  
     public static BigDecimalValidator getInstance() {
 82  16
         return VALIDATOR;
 83  
     }
 84  
 
 85  
     /**
 86  
      * Construct a <i>strict</i> instance.
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      */
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     public BigDecimalValidator() {
 89  14
         this(true);
 90  14
     }
 91  
 
 92  
     /**
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      * <p>Construct an instance with the specified strict setting.</p>
 94  
      * 
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      * @param strict <code>true</code> if strict 
 96  
      *        <code>Format</code> parsing should be used.
 97  
      */
 98  
     public BigDecimalValidator(boolean strict) {
 99  25
         this(strict, STANDARD_FORMAT, true);
 100  25
     }
 101  
 
 102  
     /**
 103  
      * <p>Construct an instance with the specified strict setting
 104  
      *    and format type.</p>
 105  
      *    
 106  
      * <p>The <code>formatType</code> specified what type of
 107  
      *    <code>NumberFormat</code> is created - valid types
 108  
      *    are:</p>
 109  
      *    <ul>
 110  
      *       <li>AbstractNumberValidator.STANDARD_FORMAT -to create
 111  
      *           <i>standard</i> number formats (the default).</li>
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      *       <li>AbstractNumberValidator.CURRENCY_FORMAT -to create
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      *           <i>currency</i> number formats.</li>
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      *       <li>AbstractNumberValidator.PERCENT_FORMAT -to create
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      *           <i>percent</i> number formats (the default).</li>
 116  
      *    </ul>
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      * 
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      * @param strict <code>true</code> if strict 
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      *        <code>Format</code> parsing should be used.
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      * @param formatType The <code>NumberFormat</code> type to
 121  
      *        create for validation, default is STANDARD_FORMAT.
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      * @param allowFractions <code>true</code> if fractions are
 123  
      *        allowed or <code>false</code> if integers only.
 124  
      */
 125  
     protected BigDecimalValidator(boolean strict, int formatType, 
 126  
             boolean allowFractions) {
 127  33
         super(strict, formatType, allowFractions);
 128  33
     }
 129  
 
 130  
     /**
 131  
      * <p>Validate/convert a <code>BigDecimal</code> using the default
 132  
      *    <code>Locale</code>. 
 133  
      *
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      * @param value The value validation is being performed on.
 135  
      * @return The parsed <code>BigDecimal</code> if valid or <code>null</code>
 136  
      *  if invalid.
 137  
      */
 138  
     public BigDecimal validate(String value) {
 139  11
         return (BigDecimal)parse(value, (String)null, (Locale)class="keyword">null);
 140  
     }
 141  
 
 142  
     /**
 143  
      * <p>Validate/convert a <code>BigDecimal</code> using the
 144  
      *    specified <i>pattern</i>. 
 145  
      *
 146  
      * @param value The value validation is being performed on.
 147  
      * @param pattern The pattern used to validate the value against, or the
 148  
      *        default for the <code>Locale</code> if <code>null</code>.
 149  
      * @return The parsed <code>BigDecimal</code> if valid or <code>null</code> if invalid.
 150  
      */
 151  
     public BigDecimal validate(String value, String pattern) {
 152  6
         return (BigDecimal)parse(value, pattern, (Locale)null);
 153  
     }
 154  
 
 155  
     /**
 156  
      * <p>Validate/convert a <code>BigDecimal</code> using the
 157  
      *    specified <code>Locale</code>. 
 158  
      *
 159  
      * @param value The value validation is being performed on.
 160  
      * @param locale The locale to use for the number format, system default if null.
 161  
      * @return The parsed <code>BigDecimal</code> if valid or <code>null</code> if invalid.
 162  
      */
 163  
     public BigDecimal validate(String value, Locale locale) {
 164  24
         return (BigDecimal)parse(value, (String)null, locale);
 165  
     }
 166  
 
 167  
     /**
 168  
      * <p>Validate/convert a <code>BigDecimal</code> using the
 169  
      *    specified pattern and/ or <code>Locale</code>. 
 170  
      *
 171  
      * @param value The value validation is being performed on.
 172  
      * @param pattern The pattern used to validate the value against, or the
 173  
      *        default for the <code>Locale</code> if <code>null</code>.
 174  
      * @param locale The locale to use for the date format, system default if null.
 175  
      * @return The parsed <code>BigDecimal</code> if valid or <code>null</code> if invalid.
 176  
      */
 177  
     public BigDecimal validate(String value, String pattern, Locale locale) {
 178  6
         return (BigDecimal)parse(value, pattern, locale);
 179  
     }
 180  
 
 181  
     /**
 182  
      * Check if the value is within a specified range.
 183  
      * 
 184  
      * @param value The <code>Number</code> value to check.
 185  
      * @param min The minimum value of the range.
 186  
      * @param max The maximum value of the range.
 187  
      * @return <code>true</code> if the value is within the
 188  
      *         specified range.
 189  
      */
 190  
     public boolean isInRange(BigDecimal value, double min, class="keyword">double max) {
 191  5
         return (value.doubleValue() >= min && value.doubleValue() <= max);
 192  
     }
 193  
 
 194  
     /**
 195  
      * Check if the value is greater than or equal to a minimum.
 196  
      * 
 197  
      * @param value The value validation is being performed on.
 198  
      * @param min The minimum value.
 199  
      * @return <code>true</code> if the value is greater than
 200  
      *         or equal to the minimum.
 201  
      */
 202  
     public boolean minValue(BigDecimal value, double min) {
 203  3
         return (value.doubleValue() >= min);
 204  
     }
 205  
 
 206  
     /**
 207  
      * Check if the value is less than or equal to a maximum.
 208  
      * 
 209  
      * @param value The value validation is being performed on.
 210  
      * @param max The maximum value.
 211  
      * @return <code>true</code> if the value is less than
 212  
      *         or equal to the maximum.
 213  
      */
 214  
     public boolean maxValue(BigDecimal value, double max) {
 215  3
         return (value.doubleValue() <= max);
 216  
     }
 217  
 
 218  
     /**
 219  
      * Convert the parsed value to a <code>BigDecimal</code>.
 220  
      * 
 221  
      * @param value The parsed <code>Number</code> object created.
 222  
      * @param formatter The Format used to parse the value with.
 223  
      * @return The parsed <code>Number</code> converted to a 
 224  
      *         <code>BigDecimal</code>.
 225  
      */
 226  
     protected Object processParsedValue(Object value, Format formatter) {
 227  86
         BigDecimal decimal = null;
 228  86
         if (value instanceof Long) {
 229  26
             decimal = BigDecimal.valueOf(((Long)value).longValue());
 230  
         } else {
 231  60
             decimal = new BigDecimal(value.toString());
 232  
         }
 233  
 
 234  86
         int scale = determineScale((NumberFormat)formatter);
 235  86
         if (scale >= 0) {
 236  39
             decimal = decimal.setScale(scale, BigDecimal.ROUND_DOWN);
 237  
         }
 238  
 
 239  86
         return decimal;
 240  
     }
 241  
 }

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