com.datastax.oss.driver.internal.querybuilder.select.CountAllSelector Maven / Gradle / Ivy
/*
* 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.querybuilder.select;
import com.datastax.oss.driver.api.core.CqlIdentifier;
import com.datastax.oss.driver.api.querybuilder.select.Selector;
import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;
import java.util.Objects;
import net.jcip.annotations.Immutable;
@Immutable
public class CountAllSelector implements Selector {
private final CqlIdentifier alias;
public CountAllSelector() {
this(null);
}
public CountAllSelector(@Nullable CqlIdentifier alias) {
this.alias = alias;
}
@NonNull
@Override
public Selector as(@NonNull CqlIdentifier alias) {
return new CountAllSelector(alias);
}
@Override
public void appendTo(@NonNull StringBuilder builder) {
builder.append("count(*)");
if (alias != null) {
builder.append(" AS ").append(alias.asCql(true));
}
}
@Nullable
@Override
public CqlIdentifier getAlias() {
return alias;
}
@Override
public boolean equals(Object other) {
if (other == this) {
return true;
} else if (other instanceof CountAllSelector) {
CountAllSelector that = (CountAllSelector) other;
return Objects.equals(this.alias, that.alias);
} else {
return false;
}
}
@Override
public int hashCode() {
return (alias == null) ? 0 : alias.hashCode();
}
}