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16 package org.seasar.cubby.validator.validators;
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18 import java.util.regex.Pattern;
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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;
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48 public class NumberValidator implements ScalarFieldValidator {
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50 private static final Pattern NUMBER_PATTERN = Pattern
51 .compile("^[-+]?[0-9]+[.]?[0-9]*$");
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56 private final String messageKey;
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61 public NumberValidator() {
62 this("valid.number");
63 }
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71 public NumberValidator(final String messageKey) {
72 this.messageKey = messageKey;
73 }
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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 }
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91 final MessageInfo messageInfo = new MessageInfo();
92 messageInfo.setKey(this.messageKey);
93 context.addMessageInfo(messageInfo);
94 }
95
96 }