GridPointFilterStreamHandler.java

/*
 * Copyright (C) 2010 Brockmann Consult GmbH (info@brockmann-consult.de)
 *
 * 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; either version 3 of the License, or (at your option)
 * any later version.
 * 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, see http://www.gnu.org/licenses/
 */
package org.esa.beam.smos.visat.export;

import com.bc.ceres.core.CanceledException;
import com.bc.ceres.core.ProgressMonitor;
import com.bc.ceres.core.SubProgressMonitor;
import org.esa.beam.dataio.smos.ProductFile;
import org.esa.beam.dataio.smos.SmosFile;
import org.esa.beam.dataio.smos.SmosProductReader;
import org.esa.beam.framework.dataio.ProductReader;
import org.esa.beam.framework.datamodel.Product;

import java.io.File;
import java.io.FileFilter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;

class GridPointFilterStreamHandler {

    private final SmosFileProcessor smosFileProcessor;

    GridPointFilterStreamHandler(GridPointFilterStream filterStream, GridPointFilter gridPointFilter) {
        smosFileProcessor = new SmosFileProcessor(filterStream, gridPointFilter);
    }

    void processProduct(Product product, ProgressMonitor pm) throws IOException {
        final ProductReader productReader = product.getProductReader();
        if (productReader instanceof SmosProductReader) {
            final SmosProductReader smosProductReader = (SmosProductReader) productReader;
            final ProductFile productFile = smosProductReader.getProductFile();
            if (productFile instanceof SmosFile) {
                smosFileProcessor.process((SmosFile) productFile, pm);
            }
        }
    }

    void processDirectory(File dir, boolean recursive, ProgressMonitor pm, List<Exception> problemList) throws
                                                                                                        CanceledException {
        final List<File> sourceFileList = new ArrayList<File>();
        findSourceFiles(dir, recursive, sourceFileList);

        pm.beginTask("Exporting grid point data...", sourceFileList.size());
        try {
            for (final File sourceFile : sourceFileList) {
                ProductFile productFile = null;
                try {
                    try {
                        productFile = SmosProductReader.createProductFile(sourceFile);
                    } catch (IOException e) {
                        // ignore, file is skipped anyway
                    }
                    if (productFile instanceof SmosFile) {
                        pm.setSubTaskName(MessageFormat.format(
                                "Processing file ''{0}''...", productFile.getDataFile().getName()));
                        try {
                            smosFileProcessor.process((SmosFile) productFile, SubProgressMonitor.create(pm, 1));
                        } catch (Exception e) {
                            problemList.add(e);
                        }
                    } else {
                        pm.worked(1);
                    }
                    if (pm.isCanceled()) {
                        throw new CanceledException();
                    }
                } finally {
                    if (productFile != null) {
                        try {
                            productFile.close();
                        } catch (IOException ignored) {
                        }
                    }
                }
            }
        } finally {
            pm.done();
        }
    }

    private static void findSourceFiles(File parent, boolean recursive, List<File> sourceFileList) {
        final File[] dirs = parent.listFiles(DIRECTORY_FILTER);
        if (dirs != null) {
            if (dirs.length == 0) {
                final File[] files = parent.listFiles(EEF_FILENAME_FILTER);
                if (files != null && files.length == 2) {
                    if (files[0].getName().endsWith(".DBL")) {
                        sourceFileList.add(files[0]);
                    } else {
                        sourceFileList.add(files[1]);
                    }
                }
                return;
            }
            for (final File dir : dirs) {
                final File[] files = dir.listFiles(EEF_FILENAME_FILTER);
                if (files != null && files.length == 2) {
                    if (files[0].getName().endsWith(".DBL")) {
                        sourceFileList.add(files[0]);
                    } else {
                        sourceFileList.add(files[1]);
                    }
                } else {
                    if (recursive) {
                        findSourceFiles(dir, recursive, sourceFileList);
                    }
                }
            }
        }
    }

    private static final FileFilter DIRECTORY_FILTER = new FileFilter() {
        @Override
        public boolean accept(File file) {
            return file.isDirectory() && file.canRead();
        }
    };

    private static final FilenameFilter EEF_FILENAME_FILTER = new FilenameFilter() {
        @Override
        public boolean accept(File dir, String name) {
            return name.equals(dir.getName() + ".HDR") || name.equals(dir.getName() + ".DBL");
        }
    };
}