/*
* 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.rebind;
import com.google.gwt.core.ext.Generator;
import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.core.ext.typeinfo.TypeOracle;
import com.google.gwt.validation.client.GwtValidation;
/**
* <strong>EXPERIMENTAL</strong> and subject to change. Do not use this in
* production code.
* <p>
* Generates the generic {@link javax.validation.Validator}. The generic
* validator only handles the classes listed in the
* {@link com.google.gwt.validation.client.GwtValidation} annotation. See
* {@link com.google.gwt.validation.client.GwtValidation} for usage.
*/
public final class ValidatorGenerator extends Generator {
@Override
public String generate(TreeLogger logger, GeneratorContext context,
String typeName) throws UnableToCompleteException {
TypeOracle typeOracle = context.getTypeOracle();
assert (typeOracle != null);
JClassType validatorType = typeOracle.findType(typeName);
if (validatorType == null) {
logger.log(TreeLogger.ERROR, "Unable to find metadata for type '"
+ typeName + "'", null);
throw new UnableToCompleteException();
}
GwtValidation gwtValidation = validatorType.findAnnotationInTypeHierarchy(GwtValidation.class);
if (gwtValidation == null) {
logger.log(TreeLogger.ERROR, typeName + " must be anntotated with "
+ GwtValidation.class.getCanonicalName(), null);
throw new UnableToCompleteException();
}
if (gwtValidation.value().length == 0) {
logger.log(TreeLogger.ERROR,
"The @" + GwtValidation.class.getSimpleName() + " of " + typeName
+ "must specify at least one bean type to validate.", null);
throw new UnableToCompleteException();
}
TreeLogger validatorLogger = logger.branch(TreeLogger.DEBUG,
"Generating Validator for '" + validatorType.getQualifiedSourceName()
+ "'", null);
AbstractCreator creator = new ValidatorCreator(validatorType,
gwtValidation,
validatorLogger,
context);
return creator.create();
}
}