com.speedment.runtime.core.manager.AbstractViewManager Maven / Gradle / Ivy
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/*
*
* Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
*
* 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.speedment.runtime.core.manager;
import com.speedment.common.injector.State;
import com.speedment.common.injector.annotation.ExecuteBefore;
import com.speedment.common.injector.annotation.Inject;
import com.speedment.common.injector.annotation.WithState;
import com.speedment.runtime.core.component.ManagerComponent;
import com.speedment.runtime.core.component.ProjectComponent;
import com.speedment.runtime.core.component.StreamSupplierComponent;
import com.speedment.runtime.core.stream.parallel.ParallelStrategy;
import java.util.stream.Stream;
import static com.speedment.common.injector.State.INITIALIZED;
import static java.lang.String.format;
import static java.util.Objects.requireNonNull;
/**
* Abstract base class for VIEW Tables.
*
* @param the entity type
*
* @author Emil Forslund
* @since 3.0.10
*
* @see AbstractManager
*/
public abstract class AbstractViewManager implements Manager {
private @Inject StreamSupplierComponent streamSupplierComponent;
protected AbstractViewManager() {}
/**
* In the {@link State#INITIALIZED}-phase, install this {@link Manager} in
* the {@link ManagerComponent} so that it can be found by other parts of
* the system.
*
* THIS METHOD IS INTENDED TO BE INVOKED AUTOMATICALLY BY THE DEPENDENCY
* INJECTOR. IT SHOULD THEREFORE NEVER BE CALLED DIRECTLY!
*
* @param managerComponent auto-injected managerComponent
* @param projectComponent auto-injected projectComponent
*/
@ExecuteBefore(INITIALIZED)
final void install(
@WithState(INITIALIZED) ManagerComponent managerComponent,
@WithState(INITIALIZED) ProjectComponent projectComponent) {
requireNonNull(projectComponent); // Must be initialized first.
managerComponent.put(this);
}
@Override
public Stream stream() {
return streamSupplierComponent.stream(
getTableIdentifier(),
ParallelStrategy.computeIntensityDefault()
);
}
@Override
public Persister persister() {
throw readonlyException();
}
@Override
public Persister persister(HasLabelSet fields) {
throw readonlyException();
}
@Override
public Updater updater() {
throw readonlyException();
}
@Override
public Updater updater(HasLabelSet fields) {
throw readonlyException();
}
@Override
public Remover remover() {
throw readonlyException();
}
private RuntimeException readonlyException() {
return new UnsupportedOperationException(format(
"Manager %s is based on a VIEW Table and is therefore read-only.",
getClass().getSimpleName()
));
}
}