// License: GPL. For details, see LICENSE file. package org.openstreetmap.josm.io; import static org.openstreetmap.josm.tools.I18n.tr; import java.io.BufferedInputStream; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.util.List; import java.util.zip.GZIPInputStream; import javax.swing.JOptionPane; import org.apache.tools.bzip2.CBZip2InputStream; import org.openstreetmap.josm.Main; import org.openstreetmap.josm.actions.ExtensionFileFilter; import org.openstreetmap.josm.gui.HelpAwareOptionPane; import org.openstreetmap.josm.gui.MapView.LayerChangeListener; import org.openstreetmap.josm.gui.layer.Layer; import org.openstreetmap.josm.gui.progress.ProgressMonitor; public abstract class FileImporter implements Comparable, LayerChangeListener { public final ExtensionFileFilter filter; private boolean enabled; public FileImporter(ExtensionFileFilter filter) { this.filter = filter; this.enabled = true; } public boolean acceptFile(File pathname) { return filter.acceptName(pathname.getName()); } /** * A batch importer is a file importer that prefers to read multiple files at the same time. */ public boolean isBatchImporter() { return false; } /** * Needs to be implemented if isBatchImporter() returns false. */ public void importData(File file, ProgressMonitor progressMonitor) throws IOException, IllegalDataException { throw new IOException(tr("Could not import ''{0}''.", file.getName())); } /** * Needs to be implemented if isBatchImporter() returns true. */ public void importData(List files, ProgressMonitor progressMonitor) throws IOException, IllegalDataException { throw new IOException(tr("Could not import files.")); } /** * Wrapper to give meaningful output if things go wrong. * @return true if data import was successful */ public boolean importDataHandleExceptions(File f, ProgressMonitor progressMonitor) { try { System.out.println("Open file: " + f.getAbsolutePath() + " (" + f.length() + " bytes)"); importData(f, progressMonitor); return true; } catch (Exception e) { e.printStackTrace(); HelpAwareOptionPane.showMessageDialogInEDT( Main.parent, tr("Could not read file ''{0}''.
Error is:
{1}", f.getName(), e.getMessage()), tr("Error"), JOptionPane.ERROR_MESSAGE, null ); return false; } } public boolean importDataHandleExceptions(List files, ProgressMonitor progressMonitor) { try { System.out.println("Open "+files.size()+" files"); importData(files, progressMonitor); return true; } catch (Exception e) { e.printStackTrace(); HelpAwareOptionPane.showMessageDialogInEDT( Main.parent, tr("Could not read files.
Error is:
{0}", e.getMessage()), tr("Error"), JOptionPane.ERROR_MESSAGE, null ); return false; } } /** * If multiple files (with multiple file formats) are selected, * they are opened in the order of their priorities. * Highest priority comes first. */ public double getPriority() { return 0; } public int compareTo(FileImporter other) { return (new Double(this.getPriority())).compareTo(other.getPriority()); } public static CBZip2InputStream getBZip2InputStream(InputStream in) throws IOException { if (in == null) { return null; } BufferedInputStream bis = new BufferedInputStream(in); int b = bis.read(); if (b != 'B') throw new IOException(tr("Invalid bz2 file.")); b = bis.read(); if (b != 'Z') throw new IOException(tr("Invalid bz2 file.")); return new CBZip2InputStream(bis); } public static GZIPInputStream getGZipInputStream(InputStream in) throws IOException { if (in == null) { return null; } return new GZIPInputStream(in); } /** * Returns the enabled state of this {@code FileImporter}. When enabled, it is listed and usable in "File->Open" dialog. * @return true if this {@code FileImporter} is enabled * @since 5459 */ public final boolean isEnabled() { return enabled; } /** * Sets the enabled state of the {@code FileImporter}. When enabled, it is listed and usable in "File->Open" dialog. * @param enabled true to enable this {@code FileImporter}, false to disable it * @since 5459 */ public final void setEnabled(boolean enabled) { this.enabled = enabled; } @Override public void activeLayerChange(Layer oldLayer, Layer newLayer) { // To be overriden by subclasses if their enabled state depends of the active layer nature } @Override public void layerAdded(Layer newLayer) { // To be overriden by subclasses if needed } @Override public void layerRemoved(Layer oldLayer) { // To be overriden by subclasses if needed } }