/**
* 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.flow.mapreduce.parallel;
import java.util.List;
import com.asakusafw.compiler.common.Precondition;
import com.asakusafw.compiler.flow.DataClass;
import com.asakusafw.compiler.flow.DataClass.Property;
import com.asakusafw.compiler.flow.FlowCompilingEnvironment;
import com.asakusafw.utils.collections.Lists;
/**
* {@link Slot}を解析して{@link ResolvedSlot}に変換する。
*/
public class SlotResolver {
private FlowCompilingEnvironment environment;
/**
* インスタンスを生成する。
* @param environment コンパイルに利用する環境
* @throws IllegalArgumentException 引数に{@code null}が指定された場合
*/
public SlotResolver(FlowCompilingEnvironment environment) {
Precondition.checkMustNotBeNull(environment, "environment"); //$NON-NLS-1$
this.environment = environment;
}
/**
* していのスロット一覧をコンパイルし、結果を返す。
* @param slots 対象のスロット一覧
* @return コンパイル結果
* @throws IllegalArgumentException 引数に{@code null}が指定された場合
*/
public List<ResolvedSlot> resolve(List<Slot> slots) {
Precondition.checkMustNotBeNull(slots, "slots"); //$NON-NLS-1$
List<ResolvedSlot> results = Lists.create();
int number = 0;
for (Slot slot : slots) {
ResolvedSlot compiled = compile(slot, number++);
results.add(compiled);
}
return results;
}
private ResolvedSlot compile(Slot slot, int number) {
assert slot != null;
DataClass valueClass = environment.getDataClasses().load(slot.getType());
List<Property> sortProperties = Lists.create();
if (valueClass == null) {
valueClass = new DataClass.Unresolved(environment.getModelFactory(), slot.getType());
environment.error("型{0}をロードできませんでした", slot.getType());
} else {
for (String name : slot.getSortPropertyNames()) {
Property property = valueClass.findProperty(name);
if (property == null) {
environment.error("型{0}のプロパティをロードできませんでした", slot.getType(), name);
} else {
sortProperties.add(property);
}
}
}
return new ResolvedSlot(slot, number, valueClass, sortProperties);
}
}