GPBulkDataOutput.java

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 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2016 by Pentaho : http://www.pentaho.com
 *
 *******************************************************************************
 *
 * 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
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package org.pentaho.di.trans.steps.gpbulkloader;

import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.pentaho.di.core.Const;
import org.pentaho.di.core.util.Utils;
import org.pentaho.di.core.exception.KettleException;
import org.pentaho.di.core.row.RowMetaInterface;
import org.pentaho.di.core.row.ValueMetaInterface;
import org.pentaho.di.core.variables.VariableSpace;

/**
 * Does the opening of the output "stream". It's either a file or inter process communication which is transparant to
 * users of this class.
 *
 * Copied from Sven Boden's Oracle version
 *
 * @author Luke Lonergan
 * @since 28-mar-2008
 */
public class GPBulkDataOutput {
  private GPBulkLoaderMeta meta;
  private PrintWriter output = null;
  private boolean first = true;
  private int[] fieldNumbers = null;
  private String enclosure = null;
  private SimpleDateFormat sdfDate = null;
  private SimpleDateFormat sdfDateTime = null;

  public GPBulkDataOutput( GPBulkLoaderMeta meta ) {
    this.meta = meta;
  }

  public void open( VariableSpace space, Process sqlldrProcess ) throws KettleException {
    // String loadMethod = meta.getLoadMethod();
    try {
      OutputStream os = null;

      // if ( GPBulkLoaderMeta.METHOD_AUTO_CONCURRENT.equals(loadMethod))
      // {
      // String dataFile = meta.getControlFile();
      // dataFile = StringUtil.environmentSubstitute(dataFile);

      // os = new FileOutputStream(dataFile, true);
      // }
      // else
      // {
      // Else open the data file filled in.
      String dataFile = meta.getDataFile();
      dataFile = space.environmentSubstitute( dataFile );

      os = new FileOutputStream( dataFile, false );
      // }

      String encoding = meta.getEncoding();
      if ( Utils.isEmpty( encoding ) ) {
        // Use the default encoding.
        output = new PrintWriter( new BufferedWriter( new OutputStreamWriter( os ) ) );
      } else {
        // Use the specified encoding
        output = new PrintWriter( new BufferedWriter( new OutputStreamWriter( os, encoding ) ) );
      }
    } catch ( IOException e ) {
      throw new KettleException( "IO exception occured: " + e.getMessage(), e );
    }
  }

  public void close() throws IOException {
    if ( output != null ) {
      output.close();
    }
  }

  PrintWriter getOutput() {
    return output;
  }

  private String createEscapedString( String orig, String enclosure ) {
    StringBuffer buf = new StringBuffer( orig );

    Const.repl( buf, enclosure, enclosure + enclosure );
    return buf.toString();
  }

  public void writeLine( RowMetaInterface mi, Object[] row ) throws KettleException {
    if ( first ) {
      first = false;

      enclosure = meta.getEnclosure();

      // Setup up the fields we need to take for each of the rows
      // as this speeds up processing.
      fieldNumbers = new int[meta.getFieldStream().length];
      for ( int i = 0; i < fieldNumbers.length; i++ ) {
        fieldNumbers[i] = mi.indexOfValue( meta.getFieldStream()[i] );
        if ( fieldNumbers[i] < 0 ) {
          throw new KettleException( "Could not find field " + meta.getFieldStream()[i] + " in stream" );
        }
      }

      sdfDate = new SimpleDateFormat( "yyyy-MM-dd" );
      sdfDateTime = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss.SSS" );
    }

    // Write the data to the output
    ValueMetaInterface v = null;
    int number = 0;
    for ( int i = 0; i < fieldNumbers.length; i++ ) {
      if ( i != 0 ) {
        output.print( "," );
      }
      number = fieldNumbers[i];
      v = mi.getValueMeta( number );
      if ( row[number] == null ) {
        // TODO (SB): special check for null in case of Strings.
        output.print( enclosure );
        output.print( enclosure );
      } else {
        switch ( v.getType() ) {
          case ValueMetaInterface.TYPE_STRING:
            String s = mi.getString( row, number );
            if ( s.indexOf( enclosure ) >= 0 ) {
              s = createEscapedString( s, enclosure );
            }
            output.print( enclosure );
            output.print( s );
            output.print( enclosure );
            break;
          case ValueMetaInterface.TYPE_INTEGER:
            Long l = mi.getInteger( row, number );
            output.print( enclosure );
            output.print( l );
            output.print( enclosure );
            break;
          case ValueMetaInterface.TYPE_NUMBER:
            Double d = mi.getNumber( row, number );
            output.print( enclosure );
            output.print( d );
            output.print( enclosure );
            break;
          case ValueMetaInterface.TYPE_BIGNUMBER:
            BigDecimal bd = mi.getBigNumber( row, number );
            output.print( enclosure );
            output.print( bd );
            output.print( enclosure );
            break;
          case ValueMetaInterface.TYPE_DATE:
            Date dt = mi.getDate( row, number );
            output.print( enclosure );
            String mask = meta.getDateMask()[i];
            if ( GPBulkLoaderMeta.DATE_MASK_DATETIME.equals( mask ) ) {
              output.print( sdfDateTime.format( dt ) );
            } else {
              // Default is date format
              output.print( sdfDate.format( dt ) );
            }
            output.print( enclosure );
            break;
          case ValueMetaInterface.TYPE_BOOLEAN:
            Boolean b = mi.getBoolean( row, number );
            output.print( enclosure );
            if ( b.booleanValue() ) {
              output.print( "Y" );
            } else {
              output.print( "N" );
            }
            output.print( enclosure );
            break;
          case ValueMetaInterface.TYPE_BINARY:
            byte[] byt = mi.getBinary( row, number );
            output.print( "<startlob>" );
            output.print( byt );
            output.print( "<endlob>" );
            break;
          default:
            throw new KettleException( "Unsupported type" );
        }
      }
    }
    output.print( Const.CR );
  }
}