/*
* 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.builder.impl;
import org.jboss.errai.codegen.Context;
import org.jboss.errai.codegen.Statement;
import org.jboss.errai.codegen.Variable;
import org.jboss.errai.codegen.builder.BlockBuilder;
import org.jboss.errai.codegen.builder.BuildCallback;
import org.jboss.errai.codegen.builder.CatchBlockBuilder;
import org.jboss.errai.codegen.builder.StatementEnd;
import org.jboss.errai.codegen.builder.TryBlockBuilder;
import org.jboss.errai.codegen.builder.callstack.CallWriter;
import org.jboss.errai.codegen.builder.callstack.DeferredCallElement;
import org.jboss.errai.codegen.builder.callstack.DeferredCallback;
import org.jboss.errai.codegen.control.TryBlock;
import org.jboss.errai.codegen.meta.MetaClass;
import org.jboss.errai.codegen.meta.MetaClassFactory;
/**
* StatementBuilder to generate try/catch/finally blocks.
*
* @author Christian Sadilek <csadilek@redhat.com>
*/
public class TryBlockBuilderImpl extends AbstractStatementBuilder implements TryBlockBuilder, CatchBlockBuilder {
private TryBlock tryBlock;
protected TryBlockBuilderImpl(Context context, CallElementBuilder callElementBuilder) {
super(context, callElementBuilder);
}
@Override
public BlockBuilder<CatchBlockBuilder> try_() {
tryBlock = new TryBlock();
appendCallElement(new DeferredCallElement(new DeferredCallback() {
@Override
public void doDeferred(CallWriter writer, Context context, Statement statement) {
writer.reset();
writer.append(tryBlock.generate(Context.create(context)));
}
}));
return new BlockBuilderImpl<CatchBlockBuilder>(tryBlock.getBlock(), new BuildCallback<CatchBlockBuilder>() {
@Override
public CatchBlockBuilder callback(Statement statement) {
return TryBlockBuilderImpl.this;
}
@Override
public Context getParentContext() {
return context;
}
});
}
@Override
public BlockBuilder<CatchBlockBuilder> catch_(Class<? extends Throwable> exceptionType, String variableName) {
return catch_(MetaClassFactory.get(exceptionType), variableName);
}
@Override
public BlockBuilder<CatchBlockBuilder> catch_(MetaClass exceptionType, String variableName) {
Variable exceptionVar = Variable.create(variableName, exceptionType);
tryBlock.addCatchBlock(exceptionVar);
return new BlockBuilderImpl<CatchBlockBuilder>(tryBlock.getCatchBlock(exceptionVar),
new BuildCallback<CatchBlockBuilder>() {
@Override
public CatchBlockBuilder callback(Statement statement) {
return TryBlockBuilderImpl.this;
}
@Override
public Context getParentContext() {
return context;
}
});
}
@Override
public BlockBuilder<StatementEnd> finally_() {
return new BlockBuilderImpl<StatementEnd>(tryBlock.getFinallyBlock(), new BuildCallback<StatementEnd>() {
@Override
public StatementEnd callback(Statement statement) {
return TryBlockBuilderImpl.this;
}
@Override
public Context getParentContext() {
return context;
}
});
}
}