/**
* Copyright 2011-2014 Asakusa Framework Team.
*
* 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.asakusafw.compiler.operator.processor;
import java.util.List;
import javax.lang.model.element.ExecutableElement;
import com.asakusafw.compiler.common.Precondition;
import com.asakusafw.compiler.common.TargetOperator;
import com.asakusafw.compiler.operator.AbstractOperatorProcessor;
import com.asakusafw.compiler.operator.ExecutableAnalyzer;
import com.asakusafw.compiler.operator.ExecutableAnalyzer.TypeConstraint;
import com.asakusafw.compiler.operator.ImplementationBuilder;
import com.asakusafw.compiler.operator.OperatorMethodDescriptor;
import com.asakusafw.compiler.operator.OperatorMethodDescriptor.Builder;
import com.asakusafw.compiler.operator.processor.MasterKindOperatorAnalyzer.ResolveException;
import com.asakusafw.utils.java.model.syntax.ModelFactory;
import com.asakusafw.utils.java.model.syntax.TypeBodyDeclaration;
import com.asakusafw.utils.java.model.util.Models;
import com.asakusafw.utils.java.model.util.TypeBuilder;
import com.asakusafw.vocabulary.flow.graph.FlowBoundary;
import com.asakusafw.vocabulary.flow.graph.ShuffleKey;
import com.asakusafw.vocabulary.operator.MasterCheck;
/**
* {@link MasterCheck マスタ確認演算子}を処理する。
*/
@TargetOperator(MasterCheck.class)
public class MasterCheckOperatorProcessor extends AbstractOperatorProcessor {
@Override
public OperatorMethodDescriptor describe(Context context) {
Precondition.checkMustNotBeNull(context, "context"); //$NON-NLS-1$
ExecutableAnalyzer a = new ExecutableAnalyzer(context.environment, context.element);
if (a.isAbstract() == false) {
a.error("マスタ確認演算子はabstractで宣言する必要があります");
}
if (a.getReturnType().isBoolean() == false) {
a.error("マスタ確認演算子は戻り値にboolean型を指定する必要があります");
}
TypeConstraint master = a.getParameterType(0);
if (master.isModel() == false) {
a.error(0, "マスタ確認演算子の一つ目の引数はモデルオブジェクト型である必要があります");
}
TypeConstraint transaction = a.getParameterType(1);
if (transaction.isModel() == false) {
a.error(1, "マスタ確認演算子の二つ目の引数はモデルオブジェクト型である必要があります");
}
for (int i = 2, n = a.countParameters(); i < n; i++) {
a.error(i, "マスタ確認演算子にはユーザー引数を利用できません");
}
if (a.hasError()) {
return null;
}
ShuffleKey masterKey = a.getParameterKey(0);
if (masterKey == null) {
a.error("マスタ確認演算子の引数には@Key注釈によってグループ化項目を指定する必要があります");
}
ShuffleKey transactionKey = a.getParameterKey(1);
if (transactionKey == null) {
a.error("マスタ確認演算子の引数には@Key注釈によってグループ化項目を指定する必要があります");
}
ExecutableElement selector = null;
try {
selector = MasterKindOperatorAnalyzer.findSelector(context.environment, context);
} catch (ResolveException e) {
a.error(e.getMessage());
}
MasterCheck annotation = context.element.getAnnotation(MasterCheck.class);
if (annotation == null) {
a.error("注釈の解釈に失敗しました");
return null;
}
OperatorProcessorUtil.checkPortName(a, new String[] {
annotation.foundPort(),
annotation.missedPort(),
});
if (a.hasError()) {
return null;
}
Builder builder = new Builder(getTargetAnnotationType(), context);
builder.addAttribute(FlowBoundary.SHUFFLE);
builder.addAttribute(a.getObservationCount());
if (selector != null) {
builder.addOperatorHelper(selector);
}
builder.setDocumentation(a.getExecutableDocument());
builder.addInput(
a.getParameterDocument(0),
a.getParameterName(0),
a.getParameterType(0).getType(),
0,
masterKey);
builder.addInput(
a.getParameterDocument(1),
a.getParameterName(1),
a.getParameterType(1).getType(),
1,
transactionKey);
builder.addOutput(
a.getParameterName(0) + "の引き当てに成功した" + a.getParameterName(1),
annotation.foundPort(),
a.getParameterType(1).getType(),
a.getParameterName(1),
null);
builder.addOutput(
a.getParameterName(0) + "の引き当てに失敗した" + a.getParameterName(1),
annotation.missedPort(),
a.getParameterType(1).getType(),
a.getParameterName(1),
null);
return builder.toDescriptor();
}
@Override
protected List<? extends TypeBodyDeclaration> override(Context context) {
ImplementationBuilder builder = new ImplementationBuilder(context);
ModelFactory f = context.environment.getFactory();
builder.addStatement(new TypeBuilder(f, context.importer.toType(UnsupportedOperationException.class))
.newObject(Models.toLiteral(f, "マスタ確認演算子は組み込みの方法で処理されます"))
.toThrowStatement());
return builder.toImplementation();
}
}