/*
* Copyright DataStax, Inc.
*
* 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.datastax.oss.driver.internal.core.cql;
import com.datastax.oss.driver.api.core.CqlIdentifier;
import com.datastax.oss.driver.api.core.cql.ColumnDefinition;
import com.datastax.oss.driver.api.core.cql.ColumnDefinitions;
import com.datastax.oss.driver.api.core.detach.AttachmentPoint;
import edu.umd.cs.findbugs.annotations.NonNull;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
The singleton that represents no column definitions (implemented as an enum which provides the
serialization machinery for free).
/**
* The singleton that represents no column definitions (implemented as an enum which provides the
* serialization machinery for free).
*/
public enum EmptyColumnDefinitions implements ColumnDefinitions {
INSTANCE;
@Override
public int size() {
return 0;
}
@NonNull
@Override
public ColumnDefinition get(int i) {
throw new ArrayIndexOutOfBoundsException();
}
@Override
public boolean contains(@NonNull String name) {
return false;
}
@Override
public boolean contains(@NonNull CqlIdentifier id) {
return false;
}
@NonNull
@Override
public List<Integer> allIndicesOf(@NonNull String name) {
return Collections.emptyList();
}
@Override
public int firstIndexOf(@NonNull String name) {
return -1;
}
@NonNull
@Override
public List<Integer> allIndicesOf(@NonNull CqlIdentifier id) {
return Collections.emptyList();
}
@Override
public int firstIndexOf(@NonNull CqlIdentifier id) {
return -1;
}
@Override
public boolean isDetached() {
return false;
}
@Override
public void attach(@NonNull AttachmentPoint attachmentPoint) {}
@Override
public Iterator<ColumnDefinition> iterator() {
return Collections.<ColumnDefinition>emptyList().iterator();
}
}