/*
* Copyright 2013 JBoss, by Red Hat, 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 org.jboss.errai.validation.rebind;
import java.io.File;
import java.io.PrintWriter;
import javax.validation.ValidatorFactory;
import org.jboss.errai.codegen.Cast;
import org.jboss.errai.codegen.InnerClass;
import org.jboss.errai.codegen.builder.BlockBuilder;
import org.jboss.errai.codegen.builder.ClassStructureBuilder;
import org.jboss.errai.codegen.builder.impl.ClassBuilder;
import org.jboss.errai.codegen.util.Stmt;
import org.jboss.errai.common.metadata.RebindUtils;
import org.jboss.errai.validation.client.BeanValidator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.gwt.core.client.GWT;
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.validation.client.AbstractGwtValidatorFactory;
import com.google.gwt.validation.client.impl.AbstractGwtValidator;
/**
* Generates an implementation of {@link ValidatorFactory} which provides a generated implementation
* of a GWT {@link javax.validation.Validator}.
*
* @author Johannes Barop <jb@barop.de>
* @author Christian Sadilek <csadilek@redhat.com>
*/
public class ValidatorFactoryGenerator extends Generator {
private static final Logger log = LoggerFactory.getLogger(ValidatorFactoryGenerator.class);
private final String packageName = "org.jboss.errai.validation.client";
private final String className = ValidatorFactory.class.getSimpleName() + "Impl";
@Override
public String generate(TreeLogger logger, GeneratorContext context, String typeName) throws UnableToCompleteException {
final PrintWriter printWriter = context.tryCreate(logger, packageName, className);
long start = System.currentTimeMillis();
if (printWriter != null) {
log.info("Generating validator factory...");
ClassStructureBuilder<?> validatorInterface = new GwtValidatorGenerator().generate(context);
ClassStructureBuilder<?> builder = ClassBuilder
.define(packageName + "." + className, AbstractGwtValidatorFactory.class)
.publicScope()
.body();
BlockBuilder<?> methodBuilder = builder.publicMethod(AbstractGwtValidator.class, "createValidator");
if (validatorInterface == null) {
methodBuilder.append(
Stmt.nestedCall(
Stmt.newObject(BeanValidator.class, Stmt.loadLiteral(null))
)
.returnValue()
).finish();
}
else {
methodBuilder.append(
Stmt.nestedCall(
Stmt.newObject(BeanValidator.class, Cast.to(AbstractGwtValidator.class,
Stmt.invokeStatic(GWT.class, "create", validatorInterface.getClassDefinition()))
)
)
.returnValue()
).finish();
builder.getClassDefinition().addInnerClass(new InnerClass(validatorInterface.getClassDefinition()));
}
String gen = builder.toJavaString();
printWriter.append(gen);
final File tmpFile =
new File(RebindUtils.getErraiCacheDir().getAbsolutePath() + "/" + className + ".java");
RebindUtils.writeStringToFile(tmpFile, gen);
log.info("Generated validator factory in " + (System.currentTimeMillis() - start) + "ms");
context.commit(logger, printWriter);
}
return packageName + "." + className;
}
}