ColumnDef.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.xenei.jdbc4sparql.iface;

import java.security.NoSuchAlgorithmException;
import java.util.UUID;

public interface ColumnDef {
	static class Util {
		/**
		 * Create a unique ID for a column def.
		 *
		 * @param def
		 *            The column def to create the ID for.
		 * @return a type 3 UUID for the column.
		 * @throws NoSuchAlgorithmException
		 */
		public static UUID createID(final ColumnDef def) {
			final StringBuilder sb = new StringBuilder()
			.append(def.getColumnClassName())
			.append(def.getDisplaySize()).append(def.getNullable())
			.append(def.getPrecision()).append(def.getScale())
			.append(def.getType()).append(def.getTypeName())
			.append(def.isAutoIncrement())
			.append(def.isCaseSensitive()).append(def.isCurrency())
			.append(def.isDefinitelyWritable())
			.append(def.isReadOnly()).append(def.isSearchable())
			.append(def.isSigned()).append(def.isWritable());
			return UUID.nameUUIDFromBytes(sb.toString().getBytes());
		}
	}

	String getColumnClassName();

	int getDisplaySize();

	/**
	 * Indicates the nullability of values in the designated column. Possible
	 * return values are ResultSetMetaData.columnNullable,
	 * ResultSetMetaData.columnNoNulls, ResultSetMetaData.columnNullableUnknown
	 *
	 * @return the nullability status of the given column.
	 */
	int getNullable();

	int getPrecision();

	int getScale();

	int getType();

	String getTypeName();

	boolean isAutoIncrement();

	boolean isCaseSensitive();

	boolean isCurrency();

	boolean isDefinitelyWritable();

	boolean isReadOnly();

	boolean isSearchable();

	boolean isSigned();

	boolean isWritable();
}