spark IdentifierImpl 源码
spark IdentifierImpl 代码
文件路径：/sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/IdentifierImpl.java
/*
* 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 org.apache.spark.sql.connector.catalog;
import java.util.Arrays;
import java.util.Objects;
import java.util.StringJoiner;
import com.google.common.base.Preconditions;
import org.apache.spark.annotation.Evolving;
import org.apache.spark.sql.catalyst.util.package$;
/**
* An {@link Identifier} implementation.
*/
@Evolving
class IdentifierImpl implements Identifier {
private String[] namespace;
private String name;
IdentifierImpl(String[] namespace, String name) {
Preconditions.checkNotNull(namespace, "Identifier namespace cannot be null");
Preconditions.checkNotNull(name, "Identifier name cannot be null");
this.namespace = namespace;
this.name = name;
}
@Override
public String[] namespace() {
return namespace;
}
@Override
public String name() {
return name;
}
@Override
public String toString() {
StringJoiner joiner = new StringJoiner(".");
for (String p : namespace) {
joiner.add(package$.MODULE$.quoteIfNeeded(p));
}
joiner.add(package$.MODULE$.quoteIfNeeded(name));
return joiner.toString();
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof IdentifierImpl)) return false;
IdentifierImpl that = (IdentifierImpl) o;
return Arrays.equals(namespace, that.namespace) && name.equals(that.name);
}
@Override
public int hashCode() {
int result = Objects.hash(name);
result = 31 * result + Arrays.hashCode(namespace);
return result;
}
}
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