com.amazon.redshift.core.ResultHandlerDelegate Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of redshift-jdbc42 Show documentation
Java JDBC 4.2 (JRE 8+) driver for Redshift database
The newest version!
/*
 * Copyright (c) 2003, PostgreSQL Global Development Group
 * See the LICENSE file in the project root for more information.
 */

package com.amazon.redshift.core;

import java.sql.SQLException;
import java.sql.SQLWarning;
import java.util.List;

import com.amazon.redshift.core.v3.MessageLoopState;
import com.amazon.redshift.core.v3.RedshiftRowsBlockingQueue;

/**
 * Internal to the driver class, please do not use in the application.
 *
 * The class simplifies creation of ResultHandler delegates: it provides default implementation
 * for the interface methods
 */
public class ResultHandlerDelegate implements ResultHandler {
  private final ResultHandler delegate;

  public ResultHandlerDelegate(ResultHandler delegate) {
    this.delegate = delegate;
  }

  @Override
  public void handleResultRows(Query fromQuery, Field[] fields, List tuples,
      ResultCursor cursor, RedshiftRowsBlockingQueue queueTuples,
      int[] rowCount, Thread ringBufferThread) {
    if (delegate != null) {
      delegate.handleResultRows(fromQuery, fields, tuples, cursor, queueTuples, rowCount, ringBufferThread);
    }
  }

  @Override
  public void handleCommandStatus(String status, long updateCount, long insertOID) {
    if (delegate != null) {
      delegate.handleCommandStatus(status, updateCount, insertOID);
    }
  }

  @Override
  public void handleWarning(SQLWarning warning) {
    if (delegate != null) {
      delegate.handleWarning(warning);
    }
  }

  @Override
  public void handleError(SQLException error) {
    if (delegate != null) {
      delegate.handleError(error);
    }
  }

  @Override
  public void handleCompletion() throws SQLException {
    if (delegate != null) {
      delegate.handleCompletion();
    }
  }

  @Override
  public void secureProgress() {
    if (delegate != null) {
      delegate.secureProgress();
    }
  }

  @Override
  public SQLException getException() {
    if (delegate != null) {
      return delegate.getException();
    }
    return null;
  }

  @Override
  public SQLWarning getWarning() {
    if (delegate != null) {
      return delegate.getWarning();
    }
    return null;
  }
  
  @Override
  public void setStatementStateIdleFromInQuery() {
    if (delegate != null) {
    	delegate.setStatementStateIdleFromInQuery();
    }
  }
  
  @Override
  public void setStatementStateInQueryFromIdle() {
    if (delegate != null) {
    	delegate.setStatementStateInQueryFromIdle();
    }
  }
  
  
  @Override
  public boolean wantsScrollableResultSet() {
    if (delegate != null) {
      return delegate.wantsScrollableResultSet();
    }
  	return true;
  }
  
}