com.google.gwt.libideas.validation.client.validator.BuiltInValidator.java Source code

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Here is the source code for com.google.gwt.libideas.validation.client.validator.BuiltInValidator.java

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/*
 * Copyright 2006 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.gwt.libideas.validation.client.validator;

import com.google.gwt.libideas.validation.client.Subject;
import com.google.gwt.libideas.validation.client.ValidationException;
import com.google.gwt.libideas.validation.client.Validator;

import java.util.Date;

/**
 * Validator with some built in error messages.
 */
public abstract class BuiltInValidator extends Validator {

    /**
     * Build in messages for this validator. Validators should never setup their
     * own messages as it may be web based or server based.
     */
    private static BuiltInValidatorMessages msgs;

    /**
     * Gets the build in error messages.
     */
    public static BuiltInValidatorMessages getMessages() {
        return msgs;
    }

    /**
     * Sets the build in error messages.
     */
    public static void setMessages(BuiltInValidatorMessages msgs) {
        BuiltInValidator.msgs = msgs;
    }

    /**
     * Convert strings to dates.
     */
    public Date getDate(Subject v) throws ValidationException {
        Object answer = v.getValue();
        if (answer instanceof Date || answer == null) {
            return (Date) answer;
        } else if (answer instanceof String) {
            if (((String) answer).trim().length() == 0) {
                return null;
            }
            try {
                return new Date((String) answer);
            } catch (IllegalArgumentException e) {
                throw new ValidationException(
                        getMessages().badFormat(v.getLabel(), v.getValue().toString(), "9/99/9999"));
            }
        } else {
            throw new ValidationException(
                    getMessages().badFormat(v.getLabel(), v.getValue().toString(), "9/99/9999"));
        }
    }

}