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/*! ******************************************************************************
*
* Pentaho Data Integration
*
* Copyright (C) 2002-2017 by Hitachi Vantara : 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
* limitations under the License.
*
******************************************************************************/
package org.pentaho.di.trans.steps.getsubfolders;
import java.io.IOException;
import java.util.Date;
import java.util.List;
import org.apache.commons.vfs2.FileObject;
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.exception.KettleStepException;
import org.pentaho.di.core.fileinput.FileInputList;
import org.pentaho.di.core.row.RowDataUtil;
import org.pentaho.di.core.row.RowMeta;
import org.pentaho.di.core.vfs.KettleVFS;
import org.pentaho.di.i18n.BaseMessages;
import org.pentaho.di.trans.Trans;
import org.pentaho.di.trans.TransMeta;
import org.pentaho.di.trans.step.BaseStep;
import org.pentaho.di.trans.step.StepDataInterface;
import org.pentaho.di.trans.step.StepInterface;
import org.pentaho.di.trans.step.StepMeta;
import org.pentaho.di.trans.step.StepMetaInterface;
/**
* Read all subfolder inside a specified folder and convert them to rows and writes these to one or more output streams.
*
* @author Samatar
* @since 18-July-2008
*/
public class GetSubFolders extends BaseStep implements StepInterface {
private static Class PKG = GetSubFoldersMeta.class; // for i18n purposes, needed by Translator2!!
private GetSubFoldersMeta meta;
private GetSubFoldersData data;
public GetSubFolders( StepMeta stepMeta, StepDataInterface stepDataInterface, int copyNr, TransMeta transMeta,
Trans trans ) {
super( stepMeta, stepDataInterface, copyNr, transMeta, trans );
}
/**
* Build an empty row based on the meta-data...
*
* @return
*/
private Object[] buildEmptyRow() {
Object[] rowData = RowDataUtil.allocateRowData( data.outputRowMeta.size() );
return rowData;
}
public boolean processRow( StepMetaInterface smi, StepDataInterface sdi ) throws KettleException {
if ( meta.isFoldernameDynamic() && ( data.filenr >= data.filessize ) ) {
// Grab one row from previous step ...
data.readrow = getRow();
}
if ( first ) {
first = false;
if ( meta.isFoldernameDynamic() ) {
data.inputRowMeta = getInputRowMeta();
data.outputRowMeta = data.inputRowMeta.clone();
meta.getFields( data.outputRowMeta, getStepname(), null, null, this, repository, metaStore );
// Get total previous fields
data.totalpreviousfields = data.inputRowMeta.size();
// Check is filename field is provided
if ( Utils.isEmpty( meta.getDynamicFoldernameField() ) ) {
logError( BaseMessages.getString( PKG, "GetSubFolders.Log.NoField" ) );
throw new KettleException( BaseMessages.getString( PKG, "GetSubFolders.Log.NoField" ) );
}
// cache the position of the field
if ( data.indexOfFoldernameField < 0 ) {
String realDynamicFoldername = environmentSubstitute( meta.getDynamicFoldernameField() );
data.indexOfFoldernameField = data.inputRowMeta.indexOfValue( realDynamicFoldername );
if ( data.indexOfFoldernameField < 0 ) {
// The field is unreachable !
logError( BaseMessages.getString( PKG, "GetSubFolders.Log.ErrorFindingField" )
+ "[" + realDynamicFoldername + "]" );
throw new KettleException( BaseMessages.getString(
PKG, "GetSubFolders.Exception.CouldnotFindField", realDynamicFoldername ) );
}
}
} else {
// Create the output row meta-data
data.outputRowMeta = new RowMeta();
meta.getFields( data.outputRowMeta, getStepname(), null, null, this, repository, metaStore ); // get the
// metadata
// populated
// data.nrStepFields= data.outputRowMeta.size();
data.files = meta.getFolderList( this );
data.filessize = data.files.nrOfFiles();
handleMissingFiles();
}
data.nrStepFields = data.outputRowMeta.size();
} // end if first
if ( meta.isFoldernameDynamic() ) {
if ( data.readrow == null ) {
setOutputDone();
return false;
}
} else {
if ( data.filenr >= data.filessize ) {
setOutputDone();
return false;
}
}
try {
Object[] outputRow = buildEmptyRow();
int outputIndex = 0;
Object[] extraData = new Object[data.nrStepFields];
if ( meta.isFoldernameDynamic() ) {
if ( data.filenr >= data.filessize ) {
// Get value of dynamic filename field ...
String filename = getInputRowMeta().getString( data.readrow, data.indexOfFoldernameField );
String[] filesname = { filename };
String[] filesrequired = { GetSubFoldersMeta.NO };
// Get files list
data.files = meta.getDynamicFolderList( getTransMeta(), filesname, filesrequired );
data.filessize = data.files.nrOfFiles();
data.filenr = 0;
}
// Clone current input row
outputRow = data.readrow.clone();
}
if ( data.filessize > 0 ) {
data.file = data.files.getFile( data.filenr );
// filename
extraData[outputIndex++] = KettleVFS.getFilename( data.file );
// short_filename
extraData[outputIndex++] = data.file.getName().getBaseName();
try {
// Path
extraData[outputIndex++] = KettleVFS.getFilename( data.file.getParent() );
// ishidden
extraData[outputIndex++] = Boolean.valueOf( data.file.isHidden() );
// isreadable
extraData[outputIndex++] = Boolean.valueOf( data.file.isReadable() );
// iswriteable
extraData[outputIndex++] = Boolean.valueOf( data.file.isWriteable() );
// lastmodifiedtime
extraData[outputIndex++] = new Date( data.file.getContent().getLastModifiedTime() );
} catch ( IOException e ) {
throw new KettleException( e );
}
// uri
extraData[outputIndex++] = data.file.getName().getURI();
// rooturi
extraData[outputIndex++] = data.file.getName().getRootURI();
// childrens files
extraData[outputIndex++] = new Long( data.file.getChildren().length );
// See if we need to add the row number to the row...
if ( meta.includeRowNumber() && !Utils.isEmpty( meta.getRowNumberField() ) ) {
extraData[outputIndex++] = new Long( data.rownr );
}
data.rownr++;
// Add row data
outputRow = RowDataUtil.addRowData( outputRow, data.totalpreviousfields, extraData );
// Send row
putRow( data.outputRowMeta, outputRow );
if ( meta.getRowLimit() > 0 && data.rownr >= meta.getRowLimit() ) { // limit has been reached: stop now.
setOutputDone();
return false;
}
}
} catch ( Exception e ) {
throw new KettleStepException( e );
}
data.filenr++;
if ( checkFeedback( getLinesInput() ) ) {
if ( log.isBasic() ) {
logBasic( BaseMessages.getString( PKG, "GetSubFolders.Log.NrLine", "" + getLinesInput() ) );
}
}
return true;
}
private void handleMissingFiles() throws KettleException {
List nonExistantFiles = data.files.getNonExistantFiles();
if ( nonExistantFiles.size() != 0 ) {
String message = FileInputList.getRequiredFilesDescription( nonExistantFiles );
logError( BaseMessages.getString( PKG, "GetSubFolders.Error.MissingFiles", message ) );
throw new KettleException( BaseMessages.getString( PKG, "GetSubFolders.Exception.MissingFiles", message ) );
}
List nonAccessibleFiles = data.files.getNonAccessibleFiles();
if ( nonAccessibleFiles.size() != 0 ) {
String message = FileInputList.getRequiredFilesDescription( nonAccessibleFiles );
logError( BaseMessages.getString( PKG, "GetSubFolders.Error.NoAccessibleFiles", message ) );
throw new KettleException( BaseMessages
.getString( PKG, "GetSubFolders.Exception.NoAccessibleFiles", message ) );
}
}
public boolean init( StepMetaInterface smi, StepDataInterface sdi ) {
meta = (GetSubFoldersMeta) smi;
data = (GetSubFoldersData) sdi;
if ( super.init( smi, sdi ) ) {
//Set Embedded NamedCluter MetatStore Provider Key so that it can be passed to VFS
if ( getTransMeta().getNamedClusterEmbedManager() != null ) {
getTransMeta().getNamedClusterEmbedManager()
.passEmbeddedMetastoreKey( this, getTransMeta().getEmbeddedMetastoreProviderKey() );
}
try {
data.filessize = 0;
data.rownr = 1L;
data.filenr = 0;
data.totalpreviousfields = 0;
} catch ( Exception e ) {
logError( "Error initializing step: " + e.toString() );
logError( Const.getStackTracker( e ) );
return false;
}
return true;
}
return false;
}
public void dispose( StepMetaInterface smi, StepDataInterface sdi ) {
meta = (GetSubFoldersMeta) smi;
data = (GetSubFoldersData) sdi;
if ( data.file != null ) {
try {
data.file.close();
data.file = null;
} catch ( Exception e ) {
// Ignore close errors
}
}
super.dispose( smi, sdi );
}
}