View Javadoc

    1   /*
    2    * Copyright 2004-2009 the Seasar Foundation and the Others.
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *     http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
    13   * either express or implied. See the License for the specific language
    14   * governing permissions and limitations under the License.
    15   */
    16  package org.seasar.cubby.validator.validators;
    17
    18  import java.util.regex.Pattern;
    19
    20  import org.seasar.cubby.action.MessageInfo;
    21  import org.seasar.cubby.internal.util.StringUtils;
    22  import org.seasar.cubby.validator.ScalarFieldValidator;
    23  import org.seasar.cubby.validator.ValidationContext;
    24
    25  /**
    26   * 数値であるかを検証します。
    27   * <p>
    28   * <table>
    29   * <caption>検証エラー時に設定するエラーメッセージ</caption> <tbody>
    30   * <tr>
    31   * <th scope="row">デフォルトのキー</th>
    32   * <td>valid.number</td>
    33   * </tr>
    34   * <tr>
    35   * <th scope="row">置換文字列</th>
    36   * <td>
    37   * <ol start="0">
    38   * <li>フィールド名</li>
    39   * </ol></td>
    40   * </tr>
    41   * </tbody>
    42   * </table>
    43   * </p>
    44   *
    45   * @author agata
    46   * @author baba
    47   */
    48  public class NumberValidator implements ScalarFieldValidator {
    49
    50  	private static final Pattern NUMBER_PATTERN = Pattern
    51  			.compile("^[-+]?[0-9]+[.]?[0-9]*$");
    52
    53  	/**
    54  	 * メッセージキー。
    55  	 */
    56  	private final String messageKey;
    57
    58  	/**
    59  	 * コンストラクタ
    60  	 */
    61  	public NumberValidator() {
    62  		this("valid.number");
    63  	}
    64
    65  	/**
    66  	 * エラーメッセージキーを指定するコンストラクタ
    67  	 *
    68  	 * @param messageKey
    69  	 *            エラーメッセージキー
    70  	 */
    71  	public NumberValidator(final String messageKey) {
    72  		this.messageKey = messageKey;
    73  	}
    74
    75  	/**
    76  	 * {@inheritDoc}
    77  	 */
    78  	public void validate(final ValidationContext context, final Object value) {
    79  		if (value instanceof String) {
    80  			final String str = (String) value;
    81  			if (StringUtils.isEmpty(str)) {
    82  				return;
    83  			}
    84  			if (NUMBER_PATTERN.matcher(str).find()) {
    85  				return;
    86  			}
    87  		} else if (value == null) {
    88  			return;
    89  		}
    90
    91  		final MessageInfo messageInfo = new MessageInfo();
    92  		messageInfo.setKey(this.messageKey);
    93  		context.addMessageInfo(messageInfo);
    94  	}
    95
    96  }