/**
* 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 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.ImplementationBuilder;
import com.asakusafw.compiler.operator.OperatorMethodDescriptor;
import com.asakusafw.compiler.operator.OperatorMethodDescriptor.Builder;
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.GroupSort;
import com.asakusafw.vocabulary.operator.Unique;
/**
* {@link Unique 重複検出演算子}を処理する。
* @deprecated 基本的に{@link GroupSort}を利用する
*/
@Deprecated
@TargetOperator(Unique.class)
public class UniqueOperatorProcessor 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("重複検出演算子はabstractで宣言する必要があります");
}
if (a.getReturnType().isVoid() == false) {
a.error("重複検出演算子は戻り値にvoidを指定する必要があります");
}
if (a.getParameterType(0).isModel() == false) {
a.error(0, "重複検出演算子の最初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 = 1, n = a.countParameters(); i < n; i++) {
a.error(i, "重複検出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 key = a.getParameterKey(0);
if (key == null) {
a.error("重複検出演算子の引数には@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");
return null;
}
if (a.hasError()) {
return null;
}
Builder builder = new Builder(getTargetAnnotationType(), context);
builder.addAttribute(FlowBoundary.SHUFFLE);
builder.addAttribute(a.getObservationCount());
builder.setDocumentation(a.getExecutableDocument());
builder.addInput(
a.getParameterDocument(0),
a.getParameterName(0),
a.getParameterType(0).getType(),
0,
key);
builder.addOutput(
"項目の内容が一意であるデータが流れる出力",
"unique",
a.getParameterType(0).getType(),
a.getParameterName(0),
null);
builder.addOutput(
"項目の内容が一意でないデータが流れる出力",
"duplicated",
a.getParameterType(0).getType(),
a.getParameterName(0),
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, "重複検出演算子は組み込みの方法で処理されます"))
.toThrowStatement());
return builder.toImplementation();
}
}