CloseableUtil.java

/*
 * Copyright 2008-2010 the T2 Project ant the Others.
 *
 * 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 org.t2framework.confeito.util;

import java.io.Closeable;
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import org.t2framework.confeito.exception.IORuntimeException;

/**
 * 
 * <#if locale="en">
 * <p>
 * {@link Closeable} utility.
 * </p>
 * <#else>
 * <p>
 * {@code Closeable}のためのユーティリティクラスです．
 * </p>
 * </#if>
 * 
 * @author shot
 * @since 0.4.0-ga
 */
public class CloseableUtil {

	private CloseableUtil() {
	}

	/**
	 * <#if locale="en">
	 * <p>
	 * Close {@link Closeable} resource.
	 * 
	 * </p>
	 * <#else>
	 * <p>
	 * 
	 * </p>
	 * </#if>
	 * 
	 * @param c
	 */
	public static void close(Closeable c) {
		if (c == null) {
			return;
		}
		try {
			c.close();
		} catch (IOException e) {
			Throwable cause = e.getCause();
			if (cause != null && cause instanceof SQLException) {
				throw new IORuntimeException(cause);
			} else {
				throw new IORuntimeException(e);
			}
		}
	}

	/**
	 * 
	 * <#if locale="en">
	 * <p>
	 * Close {@link ResultSet}.
	 * </p>
	 * <#else>
	 * <p>
	 * 
	 * </p>
	 * </#if>
	 * 
	 * @param rs
	 */
	public static void close(final ResultSet rs) {
		if (rs == null) {
			return;
		}
		close(new Closeable() {

			@Override
			public void close() throws IOException {
				try {
					if (rs.isClosed() == false) {
						rs.close();
					}
				} catch (SQLException e) {
					throw new IOException(e);
				}
			}
		});
	}

	/**
	 * 
	 * <#if locale="en">
	 * <p>
	 * Close {@link Connection}.
	 * </p>
	 * <#else>
	 * <p>
	 * 
	 * </p>
	 * </#if>
	 * 
	 * @param connection
	 */
	public static void close(final Connection connection) {
		if (connection == null) {
			return;
		}
		close(new Closeable() {
			@Override
			public void close() throws IOException {
				try {
					if (connection.isClosed() == false) {
						connection.close();
					}
				} catch (SQLException e) {
					throw new IOException(e);
				}
			}
		});
	}

	/**
	 * 
	 * <#if locale="en">
	 * <p>
	 * Close {@link Statement}.
	 * </p>
	 * <#else>
	 * <p>
	 * 
	 * </p>
	 * </#if>
	 * 
	 * @param statement
	 */
	public static void close(final Statement statement) {
		if (statement == null) {
			return;
		}
		close(new Closeable() {

			@Override
			public void close() throws IOException {
				try {
					if (statement.isClosed() == false) {
						statement.close();
					}
				} catch (SQLException e) {
					throw new IOException(e);
				}
			}
		});
	}

}