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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.openjpa.lib.jdbc;
import java.sql.Array;
import java.sql.Blob;
import java.sql.CallableStatement;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.NClob;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLClientInfoException;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.SQLXML;
import java.sql.Savepoint;
import java.sql.Statement;
import java.sql.Struct;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.Executor;
import org.apache.openjpa.lib.util.Closeable;
/**
* Wrapper around an existing connection. Subclasses can override the
* methods whose behavior they mean to change. The equals and
* hashCode methods pass through to the base underlying data
* store connection.
*
* @author Abe White
*/
public class DelegatingConnection implements Connection, Closeable {
private final Connection _conn;
private final DelegatingConnection _del;
public DelegatingConnection(Connection conn) {
_conn = conn;
if (conn instanceof DelegatingConnection)
_del = (DelegatingConnection) _conn;
else
_del = null;
}
/**
* Return the wrapped connection.
*/
public Connection getDelegate() {
return _conn;
}
/**
* Return the base underlying data store connection.
*/
public Connection getInnermostDelegate() {
return (_del == null) ? _conn : _del.getInnermostDelegate();
}
@Override
public int hashCode() {
return getInnermostDelegate().hashCode();
}
@Override
public boolean equals(Object other) {
if (other == this)
return true;
if (other instanceof DelegatingConnection)
other = ((DelegatingConnection) other).getInnermostDelegate();
return getInnermostDelegate().equals(other);
}
@Override
public String toString() {
StringBuffer buf = new StringBuffer("conn ").append(hashCode());
appendInfo(buf);
return buf.toString();
}
protected void appendInfo(StringBuffer buf) {
if (_del != null)
_del.appendInfo(buf);
}
@Override
public Statement createStatement() throws SQLException {
return createStatement(true);
}
/**
* Create a statement, with the option of not wrapping it in a
* {@link DelegatingStatement}, which is the default.
*/
protected Statement createStatement(boolean wrap) throws SQLException {
Statement stmnt;
if (_del != null)
stmnt = _del.createStatement(false);
else
stmnt = _conn.createStatement();
if (wrap)
stmnt = new DelegatingStatement(stmnt, this);
return stmnt;
}
@Override
public PreparedStatement prepareStatement(String str) throws SQLException {
return prepareStatement(str, true);
}
/**
* Prepare a statement, with the option of not wrapping it in a
* {@link DelegatingPreparedStatement}, which is the default.
*/
protected PreparedStatement prepareStatement(String str, boolean wrap)
throws SQLException {
PreparedStatement stmnt;
if (_del != null)
stmnt = _del.prepareStatement(str, false);
else
stmnt = _conn.prepareStatement(str, ResultSet.TYPE_FORWARD_ONLY,
ResultSet.CONCUR_READ_ONLY);
if (wrap)
stmnt = new DelegatingPreparedStatement(stmnt, this);
return stmnt;
}
@Override
public CallableStatement prepareCall(String str) throws SQLException {
return prepareCall(str, true);
}
/**
* Prepare a call, with the option of not wrapping it in a
* {@link DelegatingCallableStatement}, which is the default.
*/
protected CallableStatement prepareCall(String str, boolean wrap)
throws SQLException {
CallableStatement stmnt;
if (_del != null)
stmnt = _del.prepareCall(str, false);
else
stmnt = _conn.prepareCall(str);
if (wrap)
stmnt = new DelegatingCallableStatement(stmnt, this);
return stmnt;
}
@Override
public String nativeSQL(String str) throws SQLException {
return _conn.nativeSQL(str);
}
@Override
public void setAutoCommit(boolean bool) throws SQLException {
_conn.setAutoCommit(bool);
}
@Override
public boolean getAutoCommit() throws SQLException {
return _conn.getAutoCommit();
}
@Override
public void commit() throws SQLException {
_conn.commit();
}
@Override
public void rollback() throws SQLException {
_conn.rollback();
}
@Override
public void close() throws SQLException {
_conn.close();
}
@Override
public boolean isClosed() throws SQLException {
return _conn.isClosed();
}
@Override
public DatabaseMetaData getMetaData() throws SQLException {
return getMetaData(true);
}
/**
* Return the metadata, with the option of not wrapping it in a
* {@link DelegatingDatabaseMetaData}, which is the default.
*/
protected DatabaseMetaData getMetaData(boolean wrap) throws SQLException {
DatabaseMetaData meta;
if (_del != null)
meta = _del.getMetaData(false);
else
meta = _conn.getMetaData();
if (wrap)
meta = new DelegatingDatabaseMetaData(meta, this);
return meta;
}
@Override
public void setReadOnly(boolean bool) throws SQLException {
_conn.setReadOnly(bool);
}
@Override
public boolean isReadOnly() throws SQLException {
return _conn.isReadOnly();
}
@Override
public void setCatalog(String str) throws SQLException {
_conn.setCatalog(str);
}
@Override
public String getCatalog() throws SQLException {
return _conn.getCatalog();
}
@Override
public void setTransactionIsolation(int i) throws SQLException {
_conn.setTransactionIsolation(i);
}
@Override
public int getTransactionIsolation() throws SQLException {
return _conn.getTransactionIsolation();
}
@Override
public SQLWarning getWarnings() throws SQLException {
return _conn.getWarnings();
}
@Override
public void clearWarnings() throws SQLException {
_conn.clearWarnings();
}
@Override
public Statement createStatement(int type, int concur) throws SQLException {
return createStatement(type, concur, true);
}
/**
* Create a statement, with the option of not wrapping it in a
* {@link DelegatingStatement}, which is the default.
*/
protected Statement createStatement(int type, int concur, boolean wrap)
throws SQLException {
Statement stmnt;
if (_del != null)
stmnt = _del.createStatement(type, concur, false);
else
stmnt = _conn.createStatement(type, concur);
if (wrap)
stmnt = new DelegatingStatement(stmnt, this);
return stmnt;
}
@Override
public PreparedStatement prepareStatement(String str, int type, int concur)
throws SQLException {
return prepareStatement(str, type, concur, true);
}
/**
* Prepare a statement, with the option of not wrapping it in a
* {@link DelegatingPreparedStatement}, which is the default.
*/
protected PreparedStatement prepareStatement(String str, int type,
int concur, boolean wrap) throws SQLException {
PreparedStatement stmnt;
if (_del != null)
stmnt = _del.prepareStatement(str, type, concur, false);
else
stmnt = _conn.prepareStatement(str, type, concur);
if (wrap)
stmnt = new DelegatingPreparedStatement(stmnt, this);
return stmnt;
}
@Override
public CallableStatement prepareCall(String str, int type, int concur)
throws SQLException {
return prepareCall(str, type, concur, true);
}
/**
* Prepare a call, with the option of not wrapping it in a
* {@link DelegatingCallableStatement}, which is the default.
*/
protected CallableStatement prepareCall(String str, int type, int concur,
boolean wrap) throws SQLException {
CallableStatement stmnt;
if (_del != null)
stmnt = _del.prepareCall(str, type, concur, false);
else
stmnt = _conn.prepareCall(str, type, concur);
if (wrap)
stmnt = new DelegatingCallableStatement(stmnt, this);
return stmnt;
}
@Override
public Map> getTypeMap() throws SQLException {
return _conn.getTypeMap();
}
@Override
public void setTypeMap(Map> map) throws SQLException {
_conn.setTypeMap(map);
}
// JDBC 3.0 methods follow.
@Override
public void setHoldability(int holdability) throws SQLException {
_conn.setHoldability(holdability);
}
@Override
public int getHoldability() throws SQLException {
return _conn.getHoldability();
}
@Override
public Savepoint setSavepoint() throws SQLException {
return _conn.setSavepoint();
}
@Override
public Savepoint setSavepoint(String savepoint) throws SQLException {
return _conn.setSavepoint(savepoint);
}
@Override
public void rollback(Savepoint savepoint) throws SQLException {
_conn.rollback(savepoint);
}
@Override
public void releaseSavepoint(Savepoint savepoint) throws SQLException {
_conn.releaseSavepoint(savepoint);
}
@Override
public Statement createStatement(int resultSetType,
int resultSetConcurrency, int resultSetHoldability)
throws SQLException {
return createStatement(resultSetType, resultSetConcurrency,
resultSetHoldability, true);
}
protected Statement createStatement(int resultSetType,
int resultSetConcurrency, int resultSetHoldability, boolean wrap)
throws SQLException {
Statement stmnt;
if (_del != null)
stmnt = _del.createStatement(resultSetType, resultSetConcurrency,
resultSetHoldability, false);
else {
stmnt = _conn.createStatement(resultSetType, resultSetConcurrency, resultSetHoldability);
}
if (wrap)
stmnt = new DelegatingStatement(stmnt, this);
return stmnt;
}
@Override
public PreparedStatement prepareStatement(String sql,
int resultSetType, int resultSetConcurrency, int resultSetHoldability)
throws SQLException {
return prepareStatement(sql, resultSetType, resultSetConcurrency,
resultSetHoldability, true);
}
protected PreparedStatement prepareStatement(String sql,
int resultSetType, int resultSetConcurrency, int resultSetHoldability,
boolean wrap) throws SQLException {
PreparedStatement stmnt;
if (_del != null)
stmnt = _del.prepareStatement(sql, resultSetType,
resultSetConcurrency, resultSetHoldability, false);
else {
stmnt = _conn.prepareStatement(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
}
if (wrap)
stmnt = new DelegatingPreparedStatement(stmnt, this);
return stmnt;
}
@Override
public CallableStatement prepareCall(String sql,
int resultSetType, int resultSetConcurrency, int resultSetHoldability)
throws SQLException {
return prepareCall(sql, resultSetType, resultSetConcurrency,
resultSetHoldability, true);
}
protected CallableStatement prepareCall(String sql, int resultSetType,
int resultSetConcurrency, int resultSetHoldability, boolean wrap)
throws SQLException {
CallableStatement stmnt;
if (_del != null)
stmnt = _del.prepareCall(sql, resultSetType,
resultSetConcurrency, resultSetHoldability, false);
else {
stmnt = _conn.prepareCall(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
}
if (wrap)
stmnt = new DelegatingCallableStatement(stmnt, this);
return stmnt;
}
@Override
public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys)
throws SQLException {
return prepareStatement(sql, autoGeneratedKeys, true);
}
protected PreparedStatement prepareStatement(String sql,
int autoGeneratedKeys, boolean wrap) throws SQLException {
PreparedStatement stmnt;
if (_del != null)
stmnt = _del.prepareStatement(sql, autoGeneratedKeys);
else {
stmnt = _conn.prepareStatement(sql, autoGeneratedKeys);
}
if (wrap)
stmnt = new DelegatingPreparedStatement(stmnt, this);
return stmnt;
}
@Override
public PreparedStatement prepareStatement(String sql, int[] columnIndexes)
throws SQLException {
return prepareStatement(sql, columnIndexes, true);
}
protected PreparedStatement prepareStatement(String sql,
int[] columnIndexes, boolean wrap) throws SQLException {
PreparedStatement stmnt;
if (_del != null)
stmnt = _del.prepareStatement(sql, columnIndexes, wrap);
else {
stmnt = _conn.prepareStatement(sql, columnIndexes);
}
if (wrap)
stmnt = new DelegatingPreparedStatement(stmnt, this);
return stmnt;
}
@Override
public PreparedStatement prepareStatement(String sql, String[] columnNames)
throws SQLException {
return prepareStatement(sql, columnNames, true);
}
protected PreparedStatement prepareStatement(String sql,
String[] columnNames, boolean wrap) throws SQLException {
PreparedStatement stmnt;
if (_del != null)
stmnt = _del.prepareStatement(sql, columnNames, wrap);
else {
stmnt = _conn.prepareStatement(sql, columnNames);
}
if (wrap)
stmnt = new DelegatingPreparedStatement(stmnt, this);
return stmnt;
}
// JDBC 4.0 methods follow.
@Override
public boolean isWrapperFor(Class iface) throws SQLException {
return iface.isAssignableFrom(getDelegate().getClass());
}
/**
* From java.sql.Wrapper javadoc:
*
* Returns an object that implements the given interface to allow access to
* non-standard methods, or standard methods not exposed by the proxy. If
* the receiver implements the interface then the result is the receiver
* or a proxy for the receiver. If the receiver is a wrapper and the
* wrapped object implements the interface then the result is the wrapped
* object or a proxy for the wrapped object. Otherwise return the the
* result of calling unwrap recursively on the wrapped object or a proxy
* for that result. If the receiver is not a wrapper and does not implement
* the interface, then an SQLException is thrown.
*
*/
@Override
public T unwrap(Class iface) throws SQLException {
if (isWrapperFor(iface)) {
return (T) getDelegate();
} else {
return getDelegate().unwrap(iface);
}
}
@Override
public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
return _conn.createArrayOf(typeName, elements);
}
@Override
public Blob createBlob() throws SQLException {
return _conn.createBlob();
}
@Override
public Clob createClob() throws SQLException {
return _conn.createClob();
}
@Override
public NClob createNClob() throws SQLException {
return _conn.createNClob();
}
@Override
public SQLXML createSQLXML() throws SQLException {
return _conn.createSQLXML();
}
@Override
public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
return _conn.createStruct(typeName, attributes);
}
@Override
public Properties getClientInfo() throws SQLException {
return _conn.getClientInfo();
}
@Override
public String getClientInfo(String name) throws SQLException {
return _conn.getClientInfo(name);
}
@Override
public boolean isValid(int timeout) throws SQLException {
return _conn.isValid(timeout);
}
@Override
public void setClientInfo(Properties properties) throws SQLClientInfoException {
_conn.setClientInfo(properties);
}
@Override
public void setClientInfo(String name, String value) throws SQLClientInfoException {
_conn.setClientInfo(name, value);
}
// Java 7 methods follow
@Override
public void abort(Executor executor) throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public int getNetworkTimeout() throws SQLException{
throw new UnsupportedOperationException();
}
@Override
public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException{
throw new UnsupportedOperationException();
}
@Override
public String getSchema() throws SQLException {
throw new UnsupportedOperationException();
}
@Override
public void setSchema(String schema)throws SQLException {
throw new UnsupportedOperationException();
}
}
