/*
* Copyright 2014 - 2017 Blazebit.
*
* 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.blazebit.persistence.view.impl.filter;
import com.blazebit.persistence.RestrictionBuilder;
import com.blazebit.persistence.view.SubqueryProvider;
import com.blazebit.persistence.view.filter.NullFilter;
/**
*
* @author Christian Beikov
* @since 1.0
*/
public class NullFilterImpl extends NullFilter {
private final boolean value;
public NullFilterImpl(Object value) {
if (value == null) {
throw new NullPointerException("value");
}
if (value instanceof Boolean) {
this.value = (Boolean) value;
} else if (value instanceof SubqueryProvider) {
throw new IllegalArgumentException("Subqueries are not allowed for the NullFilter");
} else {
this.value = Boolean.parseBoolean(value.toString());
}
}
@Override
public <T> T apply(RestrictionBuilder<T> rb) {
if (value) {
return rb.isNull();
} else {
return rb.isNotNull();
}
}
}