/*
* Copyright (c) 2011. The Apache Software Foundation
*
* 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.hbase.hbql.statement;
import org.apache.hadoop.hbase.hbql.client.ExecutionResults;
import org.apache.hadoop.hbase.hbql.client.HBqlException;
import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
import org.apache.hadoop.hbase.hbql.mapping.AttribMapping;
import org.apache.hadoop.hbase.hbql.mapping.FamilyMapping;
import org.apache.hadoop.hbase.hbql.mapping.TableMapping;
import org.apache.hadoop.hbase.hbql.statement.args.KeyInfo;
import org.apache.hadoop.hbase.hbql.util.Sets;
import java.util.List;
import java.util.Set;
public class CreateMappingStatement extends StatementWithMapping implements ConnectionStatement {
private final boolean tempMapping;
private final boolean systemMapping;
private final String tableName;
private final KeyInfo keyInfo;
private final List<FamilyMapping> familyMappingList;
public CreateMappingStatement(final StatementPredicate predicate,
final boolean tempMapping,
final boolean systemMapping,
final String mappingName,
final String tableName,
final AttribMapping attribMapping) {
super(predicate, mappingName);
this.tempMapping = tempMapping;
this.systemMapping = systemMapping;
this.tableName = (tableName == null || tableName.length() == 0) ? mappingName : tableName;
this.keyInfo = attribMapping != null ? attribMapping.getKeyInfo() : null;
this.familyMappingList = attribMapping != null ? attribMapping.getFamilyMappingList() : null;
}
private boolean isTempMapping() {
return this.tempMapping;
}
private boolean isSystemMapping() {
return this.systemMapping;
}
private String getTableName() {
return this.tableName;
}
public KeyInfo getKeyInfo() {
return this.keyInfo;
}
private List<FamilyMapping> getFamilyMappingList() {
return familyMappingList;
}
public void validate() throws HBqlException {
// Compute keywidth expression if present
if (this.getKeyInfo() != null)
this.getKeyInfo().validate();
// Make sure family names are unique
if (this.getFamilyMappingList() != null) {
final Set<String> nameSet = Sets.newHashSet();
for (final FamilyMapping familyMapping : this.getFamilyMappingList()) {
familyMapping.validate();
final String familyName = familyMapping.getFamilyName();
if (nameSet.contains(familyName))
throw new HBqlException("Family name already mapped: " + familyName);
nameSet.add(familyName);
}
}
}
protected ExecutionResults execute(final HConnectionImpl conn) throws HBqlException {
final TableMapping tableMapping = conn.createMapping(this.isTempMapping(),
this.isSystemMapping(),
this.getMappingContext().getMappingName(),
this.getTableName(),
this.getKeyInfo(),
this.getFamilyMappingList());
this.getMappingContext().setMapping(tableMapping);
tableMapping.validate(tableMapping.getMappingName());
return new ExecutionResults("Mapping " + tableMapping.getMappingName() + " defined.");
}
public static String usage() {
return "CREATE [TEMP] MAPPING mapping_name [FOR TABLE table_name] [(key_name KEY [WIDTH int_expr], family_mapping_list)] [IF bool_expr]";
}
}