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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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).
*/
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 allIndicesOf(@NonNull String name) {
return Collections.emptyList();
}
@Override
public int firstIndexOf(@NonNull String name) {
return -1;
}
@NonNull
@Override
public List 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 iterator() {
return Collections.emptyList().iterator();
}
}