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A Speedment bundle that shades all dependencies into one jar. This is
useful when deploying an application on a server.
/**
*
* 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.field.internal.method;
import com.speedment.runtime.config.identifier.TableIdentifier;
import com.speedment.runtime.field.Field;
import com.speedment.runtime.field.method.BackwardFinder;
import com.speedment.runtime.field.trait.HasComparableOperators;
import com.speedment.runtime.field.trait.HasFinder;
import java.util.function.Supplier;
import java.util.stream.Stream;
import static java.util.Objects.requireNonNull;
/**
*
* @param the source entity
* @param the target entity
* @param the column type
* @param the field type
*
* @author Emil Forslund
* @since 3.0.0
*/
public final class BackwardFinderImpl<
ENTITY,
FK_ENTITY,
T extends Comparable,
FIELD extends Field
& HasComparableOperators
& HasFinder>
implements BackwardFinder {
private final FIELD target;
private final TableIdentifier identifier;
private final Supplier> streamSupplier;
public BackwardFinderImpl(
FIELD target,
TableIdentifier identifier,
Supplier> streamSupplier) {
this.target = requireNonNull(target);
this.identifier = requireNonNull(identifier);
this.streamSupplier = requireNonNull(streamSupplier);
}
@Override
public final FIELD getField() {
return target;
}
@Override
public final TableIdentifier getTableIdentifier() {
return identifier;
}
@Override
public Stream apply(ENTITY entity) {
@SuppressWarnings("unchecked")
final T value = (T) getField().getReferencedField().getter().apply(entity);
if (value == null) {
return null;
} else {
return streamSupplier.get().filter(getField().equal(value));
}
}
}