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JDBC4PreparedStatementWrapper.java

/*
 Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
 

  The MySQL Connector/J is licensed under the terms of the GPLv2
  <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
  There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
  this software, see the FLOSS License Exception
  <http://www.mysql.com/about/legal/licensing/foss-exception.html>.

  This program is free software; you can redistribute it and/or modify it under the terms
  of the GNU General Public License as published by the Free Software Foundation; version 2
  of the License.

  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along with this
  program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
  Floor, Boston, MA 02110-1301  USA



 */
package com.mysql.jdbc.jdbc2.optional;

import java.io.InputStream;
import java.io.Reader;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.sql.Array;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.NClob;
import java.sql.PreparedStatement;
import java.sql.RowId;
import java.sql.SQLClientInfoException;
import java.sql.SQLException;
import java.sql.SQLXML;
import java.sql.Statement;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import javax.sql.StatementEvent;

import com.mysql.jdbc.ConnectionImpl;
import com.mysql.jdbc.SQLError;
import com.mysql.jdbc.jdbc2.optional.ConnectionWrapper;
import com.mysql.jdbc.jdbc2.optional.MysqlPooledConnection;

/**
 */
00059 public class JDBC4PreparedStatementWrapper extends PreparedStatementWrapper {

      public JDBC4PreparedStatementWrapper(ConnectionWrapper c, MysqlPooledConnection conn,
                  PreparedStatement toWrap) {
            super(c, conn, toWrap);
      }
      
      public synchronized void close() throws SQLException {
            if (this.pooledConnection == null) {
                  // no-op
                  return;
            }
            
            MysqlPooledConnection con = this.pooledConnection; // we need this
                                                                                       // later...

            try {
                  super.close();
            } finally {
                  try {
                        StatementEvent e = new StatementEvent(con, this);
                        // todo: pull this all up into base classes when we support *only* JDK6 or newer
                        if (con instanceof JDBC4MysqlPooledConnection) {
                              ((JDBC4MysqlPooledConnection) con).fireStatementEvent(e);
                        } else if (con instanceof JDBC4MysqlXAConnection) {
                              ((JDBC4MysqlXAConnection) con).fireStatementEvent(e);
                        } else if (con instanceof JDBC4SuspendableXAConnection) {
                              ((JDBC4SuspendableXAConnection) con).fireStatementEvent(e);
                        }
                  } finally {
                        this.unwrappedInterfaces = null;
                  }
            }
      }
      
      public boolean isClosed() throws SQLException {
            try {
                  if (this.wrappedStmt != null) {
                        return this.wrappedStmt.isClosed();
                  } else {
                        throw SQLError.createSQLException("Statement already closed",
                                    SQLError.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
            
            return false; // never get here - compiler can't tell
      }
      
      public void setPoolable(boolean poolable) throws SQLException {
            try {
                  if (this.wrappedStmt != null) {
                        this.wrappedStmt.setPoolable(poolable);
                  } else {
                        throw SQLError.createSQLException("Statement already closed",
                                    SQLError.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
      }
      
      public boolean isPoolable() throws SQLException {
            try {
                  if (this.wrappedStmt != null) {
                        return this.wrappedStmt.isPoolable();
                  } else {
                        throw SQLError.createSQLException("Statement already closed",
                                    SQLError.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
            
            return false; // never get here - compiler can't tell
      }
    
      public void setRowId(int parameterIndex, RowId x) throws SQLException {
            try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setRowId(parameterIndex,
                                    x);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
      }
      
      public void setNClob(int parameterIndex, NClob value) throws SQLException {
            try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setNClob(parameterIndex,
                                    value);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
      }

      public void setSQLXML(int parameterIndex, SQLXML xmlObject)
                  throws SQLException {
            try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setSQLXML(parameterIndex,
                                    xmlObject);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
      }
      
      
      public void setNString(int parameterIndex,
            String value)
            throws SQLException {
            try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setNString(parameterIndex,
                                    value);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
      }
            
    public void setNCharacterStream(int parameterIndex,
                    Reader value,
                    long length)
                    throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setNCharacterStream(parameterIndex,
                                    value, length);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
    }

    public void setClob(int parameterIndex,
            Reader reader,
            long length)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setClob(parameterIndex,
                                    reader, length);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }     
    }
    
    public void setBlob(int parameterIndex,
            InputStream inputStream,
            long length)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setBlob(parameterIndex,
                                    inputStream, length);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
    }
    
    public void setNClob(int parameterIndex,
            Reader reader,
            long length)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setNClob(parameterIndex,
                                    reader, length);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
    }
    
    public void setAsciiStream(int parameterIndex,
            InputStream x,
            long length)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setAsciiStream(parameterIndex,
                                    x, length);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
    }
    
    public void setBinaryStream(int parameterIndex,
            InputStream x,
            long length)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setBinaryStream(parameterIndex,
                                    x, length);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
    }
    
    public void setCharacterStream(int parameterIndex,
            Reader reader,
            long length)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setCharacterStream(parameterIndex,
                                    reader, length);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
    }
    
    public void setAsciiStream(int parameterIndex,
            InputStream x)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setAsciiStream(parameterIndex,
                                    x);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
    }
    
    public void setBinaryStream(int parameterIndex,
            InputStream x)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setBinaryStream(parameterIndex,
                                    x);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
    }
    
    public void setCharacterStream(int parameterIndex,
            Reader reader)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setCharacterStream(parameterIndex,
                                    reader);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
      
    }
    
    public void setNCharacterStream(int parameterIndex,
            Reader value)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setNCharacterStream(parameterIndex,
                                    value);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
      
    }
    
    public void setClob(int parameterIndex,
            Reader reader)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setClob(parameterIndex,
                                    reader);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
      
    }
    
    public void setBlob(int parameterIndex,
            InputStream inputStream)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setBlob(parameterIndex,
                                    inputStream);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
    }
    
    public void setNClob(int parameterIndex,
            Reader reader)
            throws SQLException {
      try {
                  if (this.wrappedStmt != null) {
                        ((PreparedStatement) this.wrappedStmt).setNClob(parameterIndex,
                                    reader);
                  } else {
                        throw SQLError.createSQLException(
                                    "No operations allowed after statement closed",
                                    SQLError.SQL_STATE_GENERAL_ERROR, this.exceptionInterceptor);
                  }
            } catch (SQLException sqlEx) {
                  checkAndFireConnectionError(sqlEx);
            }
    }
      
      /**
       * Returns true if this either implements the interface argument or is
       * directly or indirectly a wrapper for an object that does. Returns false
       * otherwise. If this implements the interface then return true, else if
       * this is a wrapper then return the result of recursively calling
       * <code>isWrapperFor</code> on the wrapped object. If this does not
       * implement the interface and is not a wrapper, return false. This method
       * should be implemented as a low-cost operation compared to
       * <code>unwrap</code> so that callers can use this method to avoid
       * expensive <code>unwrap</code> calls that may fail. If this method
       * returns true then calling <code>unwrap</code> with the same argument
       * should succeed.
       * 
       * @param interfaces
       *            a Class defining an interface.
       * @return true if this implements the interface or directly or indirectly
       *         wraps an object that does.
       * @throws java.sql.SQLException
       *             if an error occurs while determining whether this is a
       *             wrapper for an object with the given interface.
       * @since 1.6
       */
00471       public boolean isWrapperFor(Class<?> iface) throws SQLException {

            boolean isInstance = iface.isInstance(this);

            if (isInstance) {
                  return true;
            }

            String interfaceClassName = iface.getName();
            
            return (interfaceClassName.equals("com.mysql.jdbc.Statement")
                        || interfaceClassName.equals("java.sql.Statement")
                        || interfaceClassName.equals("java.sql.PreparedStatement")
                        || interfaceClassName.equals("java.sql.Wrapper"));
      }

      /**
       * Returns an object that implements the given interface to allow access to
       * non-standard methods, or standard methods not exposed by the proxy. The
       * result may be either the object found to implement the interface or a
       * proxy for that object. If the receiver implements the interface then that
       * is the object. If the receiver is a wrapper and the wrapped object
       * implements the interface then that is the object. Otherwise the object is
       * the result of calling <code>unwrap</code> recursively on the wrapped
       * object. If the receiver is not a wrapper and does not implement the
       * interface, then an <code>SQLException</code> is thrown.
       * 
       * @param iface
       *            A Class defining an interface that the result must implement.
       * @return an object that implements the interface. May be a proxy for the
       *         actual implementing object.
       * @throws java.sql.SQLException
       *             If no object found that implements the interface
       * @since 1.6
       */
00506       public synchronized <T> T unwrap(java.lang.Class<T> iface)
                  throws java.sql.SQLException {
            try {
                  if ("java.sql.Statement".equals(iface.getName()) 
                              || "java.sql.PreparedStatement".equals(iface.getName()) 
                              || "java.sql.Wrapper.class".equals(iface.getName())) {
                        return iface.cast(this);
                  }
                  
                  if (unwrappedInterfaces == null) {
                        unwrappedInterfaces = new HashMap();
                  }
                  
                  Object cachedUnwrapped = unwrappedInterfaces.get(iface);
                  
                  if (cachedUnwrapped == null) {
                        if (cachedUnwrapped == null) {
                              cachedUnwrapped = Proxy.newProxyInstance(
                                          this.wrappedStmt.getClass().getClassLoader(), 
                                          new Class[] { iface },
                                          new ConnectionErrorFiringInvocationHandler(this.wrappedStmt));
                              unwrappedInterfaces.put(iface, cachedUnwrapped);
                        }
                        unwrappedInterfaces.put(iface, cachedUnwrapped);
                  }
                  
                  return iface.cast(cachedUnwrapped);
            } catch (ClassCastException cce) {
                  throw SQLError.createSQLException("Unable to unwrap to "
                              + iface.toString(), SQLError.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
            }
      }
}

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