/*
* 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.JParameterizedType;
import com.google.gwt.core.ext.typeinfo.TypeOracle;
import com.google.gwt.validation.client.impl.GwtSpecificValidator;
/**
* <strong>EXPERIMENTAL</strong> and subject to change. Do not use this in
* production code.
* <p>
* Generates a {@link com.google.gwt.validation.client.GwtSpecificValidator}.
* <p>
* This class is thread safe.
*/
public final class GwtSpecificValidatorGenerator extends Generator {
@Override
public String generate(TreeLogger logger, GeneratorContext context,
String typeName) throws UnableToCompleteException {
JClassType validatorType = context.getTypeOracle().findType(typeName);
TypeOracle typeOracle = context.getTypeOracle();
assert (typeOracle != null);
JClassType validator = typeOracle.findType(typeName);
if (validator == null) {
logger.log(TreeLogger.ERROR, "Unable to find metadata for type '"
+ typeName + "'", null);
throw new UnableToCompleteException();
}
JClassType gwtSpecificInterface = getGwtSpecificValidator(logger, validator);
JClassType beanType = getBeanType(logger, validator, gwtSpecificInterface);
BeanHelper beanHelper = BeanHelper.createBeanHelper(beanType,logger,context);
if (beanHelper == null) {
logger.log(TreeLogger.ERROR, "Unable to create BeanHelper for " + beanType
+ " " + GwtSpecificValidator.class.getSimpleName()
+ ".", null);
throw new UnableToCompleteException();
}
AbstractCreator creator = new GwtSpecificValidatorCreator(validatorType,
beanType, beanHelper, logger, context);
return creator.create();
}
private JClassType getBeanType(TreeLogger logger, JClassType validator,
JClassType gwtSpecificInterface) throws UnableToCompleteException {
if (gwtSpecificInterface instanceof JParameterizedType) {
JParameterizedType paramType = (JParameterizedType) gwtSpecificInterface;
return paramType.getTypeArgs()[0];
}
logger.log(TreeLogger.ERROR, validator.getQualifiedSourceName()
+ " must implement " + GwtSpecificValidator.class.getCanonicalName()
+ " with a one generic parameter.", null);
throw new UnableToCompleteException();
}
private JClassType getGwtSpecificValidator(TreeLogger logger,
JClassType validator) throws UnableToCompleteException {
for (JClassType interfaceType : validator.getImplementedInterfaces()) {
if (interfaceType.getQualifiedSourceName().endsWith(
GwtSpecificValidator.class.getCanonicalName())) {
return interfaceType;
}
}
logger.log(TreeLogger.ERROR, validator.getQualifiedSourceName()
+ " must implement " + GwtSpecificValidator.class.getCanonicalName(),
null);
throw new UnableToCompleteException();
}
}