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A driver for Apache Cassandra 1.2+ that works exclusively with the Cassandra Query Language version 3
(CQL3) and Cassandra's binary protocol.
/*
* Copyright (C) 2012-2015 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.driver.core.schemabuilder;
import com.datastax.driver.core.DataType;
import com.google.common.base.Optional;
import java.util.LinkedHashMap;
import java.util.Map;
public abstract class AbstractCreateStatement> extends SchemaStatement {
protected Optional keyspaceName = Optional.absent();
protected boolean ifNotExists;
protected Map simpleColumns = new LinkedHashMap();
@SuppressWarnings("unchecked")
private T self = (T) this;
/**
* Add the 'IF NOT EXISTS' condition to this CREATE statement.
*
* @return this CREATE statement.
*/
public T ifNotExists() {
this.ifNotExists = true;
return self;
}
/**
* Add a column definition to this CREATE statement.
*
*
* To add a list column:
*
* addColumn("myList",DataType.list(DataType.text()))
*
*
* To add a set column:
*
* addColumn("mySet",DataType.set(DataType.text()))
*
*
* To add a map column:
*
* addColumn("myMap",DataType.map(DataType.cint(),DataType.text()))
*
*
* @param columnName the name of the column to be added.
* @param dataType the data type of the column to be added.
* @return this CREATE statement.
*/
public T addColumn(String columnName, DataType dataType) {
validateNotEmpty(columnName, "Column name");
validateNotNull(dataType, "Column type");
validateNotKeyWord(columnName, String.format("The column name '%s' is not allowed because it is a reserved keyword", columnName));
simpleColumns.put(columnName, new NativeColumnType(dataType));
return self;
}
/**
* Add a column definition to this CREATE statement, when the type contains a UDT.
*
* @param columnName the name of the column to be added.
* @param udtType the UDT type of the column to be added. Use {@link SchemaBuilder#frozen(String)} or {@link SchemaBuilder#udtLiteral(String)}.
* @return this CREATE statement.
*/
public T addUDTColumn(String columnName, UDTType udtType) {
validateNotEmpty(columnName, "Column name");
validateNotNull(udtType, "Column type");
validateNotKeyWord(columnName, String.format("The column name '%s' is not allowed because it is a reserved keyword", columnName));
simpleColumns.put(columnName, udtType);
return self;
}
/**
* Shorthand to add a column definition to this CREATE statement, when the type is a list of UDT.
*
* @param columnName the name of the column to be added
* @param udtType the udt type of the column to be added. Use {@link SchemaBuilder#frozen(String)}.
* @return this CREATE statement.
*/
public T addUDTListColumn(String columnName, UDTType udtType) {
validateNotEmpty(columnName, "Column name");
validateNotNull(udtType, "Column element type");
validateNotKeyWord(columnName, String.format("The column name '%s' is not allowed because it is a reserved keyword", columnName));
simpleColumns.put(columnName, UDTType.list(udtType));
return self;
}
/**
* Shorthand to add a column definition to this CREATE statement, when the type is a set of UDT.
*
* @param columnName the name of the column to be added
* @param udtType the udt type of the column to be added. Use {@link SchemaBuilder#frozen(String)}.
* @return this CREATE statement.
*/
public T addUDTSetColumn(String columnName, UDTType udtType) {
validateNotEmpty(columnName, "Column name");
validateNotNull(udtType, "Column element type");
validateNotKeyWord(columnName, String.format("The column name '%s' is not allowed because it is a reserved keyword", columnName));
simpleColumns.put(columnName, UDTType.set(udtType));
return self;
}
/**
* Shorthand to add a column definition to this CREATE statement, when the type is a map with a UDT value type.
*
* Example:
*
* addUDTMapColumn("addresses", DataType.text(), frozen("address"));
*
*
* @param columnName the name of the column to be added.
* @param keyType the key type of the column to be added.
* @param valueUdtType the value UDT type of the column to be added. Use {@link SchemaBuilder#frozen(String)}.
* @return this CREATE statement.
*/
public T addUDTMapColumn(String columnName, DataType keyType, UDTType valueUdtType) {
validateNotEmpty(columnName, "Column name");
validateNotNull(keyType, "Map key type");
validateNotNull(valueUdtType, "Map value UDT type");
validateNotKeyWord(columnName, String.format("The column name '%s' is not allowed because it is a reserved keyword", columnName));
simpleColumns.put(columnName, UDTType.mapWithUDTValue(keyType, valueUdtType));
return self;
}
/**
* Shorthand to add a column definition to this CREATE statement, when the type is a map with a UDT key type.
*
* Example:
*
* addUDTMapColumn("roles", frozen("user"), DataType.text());
*
*
* @param columnName the name of the column to be added.
* @param udtKeyType the key UDT type of the column to be added. Use {@link SchemaBuilder#frozen(String)}.
* @param valueType the value raw type of the column to be added.
* @return this CREATE statement.
*/
public T addUDTMapColumn(String columnName, UDTType udtKeyType, DataType valueType) {
validateNotEmpty(columnName, "Column name");
validateNotNull(udtKeyType, "Map key UDT type");
validateNotNull(valueType, "Map value type");
validateNotKeyWord(columnName, String.format("The column name '%s' is not allowed because it is a reserved keyword", columnName));
simpleColumns.put(columnName, UDTType.mapWithUDTKey(udtKeyType, valueType));
return self;
}
/**
* Shorthand to add a column definition to this CREATE statement, when the type is a map with UDT key and value types.
*
* Example:
*
* addUDTMapColumn("users", frozen("user"), frozen("address"));
*
*
* @param columnName the name of the column to be added.
* @param udtKeyType the key UDT type of the column to be added. Use {@link SchemaBuilder#frozen(String)}.
* @param udtValueType the value UDT type of the column to be added. Use {@link SchemaBuilder#frozen(String)}.
* @return this CREATE statement.
*/
public T addUDTMapColumn(String columnName, UDTType udtKeyType, UDTType udtValueType) {
validateNotEmpty(columnName, "Column name");
validateNotNull(udtKeyType, "Map key UDT type");
validateNotNull(udtValueType, "Map value UDT type");
validateNotKeyWord(columnName, String.format("The column name '%s' is not allowed because it is a reserved keyword", columnName));
simpleColumns.put(columnName, UDTType.mapWithUDTKeyAndValue(udtKeyType, udtValueType));
return self;
}
protected String buildColumnType(Map.Entry entry) {
final ColumnType columnType = entry.getValue();
return entry.getKey() + " " + columnType.asCQLString();
}
}