org.apache.hadoop.hive.ql.metadata.NotNullConstraint Maven / Gradle / Ivy
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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 org.apache.hadoop.hive.ql.metadata;
import java.io.Serializable;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import org.apache.hadoop.hive.metastore.api.SQLNotNullConstraint;
/**
* NotNullConstraintInfo is a metadata structure containing the not null constraints
* associated with a table.
*/
@SuppressWarnings("serial")
public class NotNullConstraint implements Serializable {
// Mapping from constraint name to list of not null columns
Map notNullConstraints;
String databaseName;
String tableName;
public NotNullConstraint() {}
public NotNullConstraint(List nns, String tableName, String databaseName) {
this.databaseName = databaseName;
this.tableName = tableName;
this.notNullConstraints = new TreeMap();
if (nns ==null) {
return;
}
for (SQLNotNullConstraint pk : nns) {
if (pk.getTable_db().equalsIgnoreCase(databaseName) &&
pk.getTable_name().equalsIgnoreCase(tableName)) {
notNullConstraints.put(pk.getNn_name(), pk.getColumn_name());
}
}
}
public String getTableName() {
return tableName;
}
public String getDatabaseName() {
return databaseName;
}
public Map getNotNullConstraints() {
return notNullConstraints;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Not Null Constraints for " + databaseName + "." + tableName + ":");
sb.append("[");
if (notNullConstraints != null && notNullConstraints.size() > 0) {
for (Map.Entry me : notNullConstraints.entrySet()) {
sb.append(" {Constraint Name: " + me.getKey());
sb.append(", Column Name: " + me.getValue());
sb.append("},");
}
sb.setLength(sb.length()-1);
}
sb.append("]");
return sb.toString();
}
}