/*
* Copyright 2011 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.codegen.framework;
import org.jboss.errai.codegen.framework.builder.callstack.LoadClassReference;
import org.jboss.errai.codegen.framework.exception.InvalidTypeException;
import org.jboss.errai.codegen.framework.meta.MetaClass;
import org.jboss.errai.codegen.framework.meta.MetaClassFactory;
/**
* @author Mike Brock <cbrock@redhat.com>
*/
public class Cast implements Statement {
private MetaClass toType;
private Statement statement;
private Cast(MetaClass toType, Statement statement) {
this.toType = toType;
this.statement = statement;
}
public static Statement to(Class<?> cls, Statement stmt) {
return to(MetaClassFactory.get(cls), stmt);
}
public static Cast to(MetaClass cls, Statement stmt) {
return new Cast(cls, stmt);
}
@Override
public String generate(Context context) {
String stmt = statement.generate(context);
if (!toType.isAssignableFrom(statement.getType()) && !toType.isAssignableTo(statement.getType())) {
throw new InvalidTypeException(statement.getType() + " cannot be cast to " + toType);
}
else if (toType.isAssignableFrom(statement.getType())) {
return stmt;
}
else {
return "(" + LoadClassReference.getClassReference(toType, context) + ") " + stmt;
}
}
@Override
public MetaClass getType() {
return toType;
}
@Override
public String toString() {
return "((" + toType.getFullyQualifiedName() + ")" + statement.toString() + ")";
}
}