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Cassandra support for Spring Data
/*
* Copyright 2017-2019 the original author or authors.
*
* 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
*
* https://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 org.springframework.data.cassandra.core.query;
import java.util.Arrays;
import java.util.Iterator;
import org.springframework.util.Assert;
/**
* Filter consisting of {@link CriteriaDefinition}s to be used with {@literal SELECT}, {@literal UPDATE} and
* {@literal DELETE} queries. A {@link Filter} describes the matched set of rows to execute a particular operation.
*
* @author Mark Paluch
* @since 2.0
*/
@FunctionalInterface
public interface Filter extends Iterable {
/**
* @return the {@link CriteriaDefinition}s.
*/
Iterable getCriteriaDefinitions();
/**
* Create a simple {@link Filter} given {@link CriteriaDefinition}s.
*
* @param criteriaDefinitions must not be {@literal null}.
* @return the {@link Filter} object for {@link CriteriaDefinition}s.
*/
static Filter from(CriteriaDefinition... criteriaDefinitions) {
Assert.notNull(criteriaDefinitions, "CriteriaDefinitions must not be null");
return from(Arrays.asList(criteriaDefinitions));
}
/**
* Create a simple {@link Filter} given {@link CriteriaDefinition}s.
*
* @param criteriaDefinitions must not be {@literal null}.
* @return the {@link Filter} object for {@link CriteriaDefinition}s.
*/
static Filter from(Iterable criteriaDefinitions) {
Assert.notNull(criteriaDefinitions, "CriteriaDefinitions must not be null");
return new DefaultFilter(criteriaDefinitions);
}
/* (non-Javadoc)
* @see java.lang.Iterable#iterator()
*/
@Override
default Iterator iterator() {
return getCriteriaDefinitions().iterator();
}
}