org.pentaho.di.trans.steps.metainject.RepositoryExporterExtension.java Source code

Introduction

Here is the source code for org.pentaho.di.trans.steps.metainject.RepositoryExporterExtension.java

Source

/*! ******************************************************************************
 *
 * 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
 * limitations under the License.
 *
 ******************************************************************************/

package org.pentaho.di.trans.steps.metainject;

import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystemException;
import org.pentaho.di.core.Const;
import org.pentaho.di.core.ObjectLocationSpecificationMethod;
import org.pentaho.di.core.exception.KettleException;
import org.pentaho.di.core.extension.ExtensionPoint;
import org.pentaho.di.core.extension.ExtensionPointInterface;
import org.pentaho.di.core.logging.LogChannelInterface;
import org.pentaho.di.core.vfs.KettleVFS;
import org.pentaho.di.i18n.BaseMessages;
import org.pentaho.di.repository.filerep.KettleFileRepository;
import org.pentaho.di.trans.TransMeta;
import org.pentaho.di.trans.step.StepMeta;

@ExtensionPoint(id = "RepositoryExporterPatchTransStep", description = "Patch the step in a transformation during repository export", extensionPointId = "RepositoryExporterPatchTransStep")
public class RepositoryExporterExtension implements ExtensionPointInterface {

    @Override
    public void callExtensionPoint(LogChannelInterface log, Object object) throws KettleException {

        Object[] metaInjectObjectArray = (Object[]) object;
        TransMeta transMeta = (TransMeta) metaInjectObjectArray[0];
        Class<?> PKG = (Class<?>) metaInjectObjectArray[1];
        KettleFileRepository fileRep = (KettleFileRepository) metaInjectObjectArray[2];
        StepMeta stepMeta = (StepMeta) metaInjectObjectArray[3];

        if (stepMeta.isEtlMetaInject()) {
            MetaInjectMeta metaInjectMeta = (MetaInjectMeta) stepMeta.getStepMetaInterface();
            // convert to a named based reference.
            //
            if (metaInjectMeta.getSpecificationMethod() == ObjectLocationSpecificationMethod.FILENAME) {
                try {
                    TransMeta meta = MetaInjectMeta.loadTransformationMeta(metaInjectMeta, fileRep,
                            fileRep.metaStore, transMeta);
                    FileObject fileObject = KettleVFS.getFileObject(meta.getFilename());
                    metaInjectMeta.setSpecificationMethod(ObjectLocationSpecificationMethod.REPOSITORY_BY_NAME);
                    metaInjectMeta.setFileName(null);
                    metaInjectMeta.setTransName(meta.getName());
                    metaInjectMeta.setDirectoryPath(Const.NVL(calcRepositoryDirectory(fileRep, fileObject), "/"));
                } catch (Exception e) {
                    log.logError(BaseMessages.getString(PKG, "Repository.Exporter.Log.UnableToLoadTransInMDI",
                            metaInjectMeta.getName()), e);
                }
            }
        }
    }

    private String calcRepositoryDirectory(KettleFileRepository fileRep, FileObject fileObject)
            throws FileSystemException {
        String path = fileObject.getParent().getName().getPath();
        String baseDirectory = fileRep.getRepositoryMeta().getBaseDirectory();
        // Double check!
        //
        if (path.startsWith(baseDirectory)) {
            return path.substring(baseDirectory.length());
        } else {
            return path;
        }
    }
}