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/*
 * Copyright 2010 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.validation.client;

import com.google.gwt.core.client.GWT;
import com.google.gwt.validation.client.impl.AbstractGwtValidator;
import com.google.gwt.validation.client.impl.GwtValidatorContext;

import javax.validation.ConstraintValidatorFactory;
import javax.validation.MessageInterpolator;
import javax.validation.TraversableResolver;
import javax.validation.Validator;
import javax.validation.ValidatorContext;
import javax.validation.ValidatorFactory;
import javax.validation.spi.ConfigurationState;

/**
 * Abstract {@link ValidatorFactory} that delegates to a GWT generated
 * {@link Validator}.
 * 

* Extend this class create and implement createValidator * *

 * public class MyValidatorFactory extends AbstractGwtValidatorFactory {
 *   @GwtValidation(value = {Pojo.class,Other.class})
 *   public static interface GwtValidator extends Validator {
 *   }
 *
 *   public AbstractGwtValidator createValidator (){
 *     return GWT.create(GwtValidator.class));
 *   }
 * }
 * 
*

* Then add a line like this to your Gwt Module config (gwt.xml) file. * *

 * <replace-with class="com.example.MyValidatorFactory">
 *   <when-type-is class="javax.validation.ValidatorFactory"/>
 * </replace-with>
 * 
*/ public abstract class AbstractGwtValidatorFactory implements ValidatorFactory { private ConstraintValidatorFactory constraintValidatorFactory; private MessageInterpolator messageInterpolator; private TraversableResolver traversableResolver; /** * Implement this method to return a {@link GWT#create}d {@link Validator} * annotated with {@link GwtValidation}. * * @return newly created Validator */ public abstract AbstractGwtValidator createValidator(); /** * GWT does not support {@link ConstraintValidatorFactory}, so the object returned by this method * will not work. */ @Override public final ConstraintValidatorFactory getConstraintValidatorFactory() { return constraintValidatorFactory; } @Override public final MessageInterpolator getMessageInterpolator() { return messageInterpolator; } @Override public final TraversableResolver getTraversableResolver() { return traversableResolver; } @Override public final Validator getValidator() { AbstractGwtValidator validator = createValidator(); validator.init(getConstraintValidatorFactory(), getMessageInterpolator(), getTraversableResolver()); return validator; } public final void init(ConfigurationState configState) { ConstraintValidatorFactory configConstraintValidatorFactory = configState.getConstraintValidatorFactory(); this.constraintValidatorFactory = configConstraintValidatorFactory != null ? configConstraintValidatorFactory : GWT.create(ConstraintValidatorFactory.class); TraversableResolver configTraversableResolver = configState.getTraversableResolver(); this.traversableResolver = configTraversableResolver != null ? configTraversableResolver : new DefaultTraversableResolver(); MessageInterpolator configMessageInterpolator = configState.getMessageInterpolator(); this.messageInterpolator = configMessageInterpolator != null ? configMessageInterpolator : new GwtMessageInterpolator(); } /** * Unsupported. Always throws an {@link UnsupportedOperationException}. * * @throws UnsupportedOperationException */ @Override public final T unwrap(Class type) { throw new UnsupportedOperationException("GWT Validation does not support upwrap()"); } @Override public final ValidatorContext usingContext() { return new GwtValidatorContext(this); } }




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