Java tutorial
/* * Copyright (C) 2014 by Array Systems Computing Inc. http://www.array.ca * * 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.nest.dataio.binary; import org.esa.beam.framework.datamodel.MetadataAttribute; import org.esa.beam.framework.datamodel.MetadataElement; import org.esa.beam.framework.datamodel.ProductData; import org.esa.snap.util.ResourceUtils; import org.esa.snap.util.XMLSupport; import org.jdom2.Attribute; import org.jdom2.Document; import org.jdom2.Element; import java.io.File; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Set; /** * Binary database reader */ public final class BinaryDBReader { private final static int Skip = 0; private final static int An = 1; private final static int In = 2; private final static int B1 = 3; private final static int B4 = 4; private final static int Fn = 5; private final static int B2 = 6; private final static int En = 7; private final static int B8 = 8; private final static int Debug = -1; private final Map<String, Object> metaMap = new HashMap<String, Object>(100); private final Document xmlDoc; private final String recName; private final long startPos; private final static boolean DEBUG_MODE = false; public BinaryDBReader(final Document xmlDoc, final String recName, final long startPos) { this.xmlDoc = xmlDoc; this.recName = recName; this.startPos = startPos; } public void assignMetadataTo(final MetadataElement elem) { final Set<String> keys = metaMap.keySet(); // The set of keys in the map. for (final String key : keys) { final Object value = metaMap.get(key); // Get the value for that key. if (value == null || key.isEmpty()) continue; if (value instanceof String) { elem.setAttributeString(key, value.toString()); } else if (value instanceof Integer) { elem.setAttributeInt(key, (Integer) value); } else if (value instanceof Double) { MetadataAttribute attrib = new MetadataAttribute(key, ProductData.TYPE_FLOAT64, 1); attrib.getData().setElemDouble((Double) value); elem.addAttribute(attrib); } else { elem.setAttributeString(key, String.valueOf(value)); } } } public void readRecord(final BinaryFileReader reader) { final Element root = xmlDoc.getRootElement(); if (DEBUG_MODE) System.out.print("\nReading " + recName + "\n\n"); final List children = root.getContent(); for (Object aChild : children) { if (aChild instanceof Element) { final Element child = (Element) aChild; if (child.getName().equals("struct")) { final Attribute loopAttrib = child.getAttribute("loop"); int loop; if (loopAttrib != null) { final String loopName = loopAttrib.getValue(); loop = getAttributeInt(loopName); } else { final Attribute nloopAttrib = child.getAttribute("nloop"); loop = Integer.parseInt(nloopAttrib.getValue()); } final List structChildren = child.getChildren(); for (int l = 1; l <= loop; ++l) { final String suffix = " " + l; for (Object aStructChild : structChildren) { if (aStructChild instanceof Element) { if (DEBUG_MODE) { DecodeElementDebug(reader, metaMap, (Element) aStructChild, suffix); } else { DecodeElement(reader, metaMap, (Element) aStructChild, suffix); } } } } } if (DEBUG_MODE) { DecodeElementDebug(reader, metaMap, child, null); } else { DecodeElement(reader, metaMap, child, null); } } } } private static void DecodeElement(final BinaryFileReader reader, final Map metaMap, final Element child, final String suffix) { String name = ""; try { final Attribute nameAttrib = child.getAttribute("name"); final Attribute typeAttrib = child.getAttribute("type"); final Attribute numAttrib = child.getAttribute("num"); if (nameAttrib != null && typeAttrib != null && numAttrib != null) { name = nameAttrib.getValue(); if (suffix != null) name += suffix; final int type = Integer.parseInt(typeAttrib.getValue()); final int num = Integer.parseInt(numAttrib.getValue()); switch (type) { case Skip: { reader.skipBytes(num); // blank break; } case An: { metaMap.put(name, reader.readAn(num)); break; } case In: { metaMap.put(name, (int) reader.readIn(num)); break; } case B1: { metaMap.put(name, reader.readB1()); break; } case B2: { metaMap.put(name, reader.readB2()); break; } case B4: { metaMap.put(name, reader.readB4()); break; } case B8: { metaMap.put(name, reader.readB8()); break; } case Fn: { metaMap.put(name, reader.readFn(num)); break; } case En: { metaMap.put(name, reader.readEn(num)); break; } case Debug: { System.out.print(" = "); for (int i = 0; i < num; ++i) { final String tmp = reader.readAn(1); if (!tmp.isEmpty() && !tmp.equals(" ")) System.out.print(tmp); } System.out.println(); break; } default: { throw new IllegalBinaryFormatException("Unknown type " + type, reader.getCurrentPos()); } } } } catch (Exception e) { if (e.getCause() != null) System.out.println(' ' + e.toString() + ':' + e.getCause().toString() + " for " + name); else System.out.println(' ' + e.toString() + ':' + " for " + name); } } private void DecodeElementDebug(final BinaryFileReader reader, final Map metaMap, final Element child, final String suffix) { String name = ""; try { final Attribute nameAttrib = child.getAttribute("name"); final Attribute typeAttrib = child.getAttribute("type"); final Attribute numAttrib = child.getAttribute("num"); if (nameAttrib != null && typeAttrib != null && numAttrib != null) { name = nameAttrib.getValue(); if (suffix != null) name += suffix; final int type = Integer.parseInt(typeAttrib.getValue()); final int num = Integer.parseInt(numAttrib.getValue()); System.out.print(" " + reader.getCurrentPos() + ' ' + (reader.getCurrentPos() - startPos + 1) + ' ' + name + ' ' + type + ' ' + num); switch (type) { case Skip: { reader.skipBytes(num); // blank break; } case An: { final String tmp = reader.readAn(num); System.out.print(" = " + tmp); metaMap.put(name, tmp); break; } case In: { final int tmp = (int) reader.readIn(num); System.out.print(" = " + tmp); metaMap.put(name, tmp); break; } case B1: { final int tmp = reader.readB1(); System.out.print(" = " + tmp); metaMap.put(name, tmp); break; } case B2: { final int tmp = reader.readB2(); System.out.print(" = " + tmp); metaMap.put(name, tmp); break; } case B4: { final int tmp = reader.readB4(); System.out.print(" = " + tmp); metaMap.put(name, tmp); break; } case B8: { final long tmp = reader.readB8(); System.out.print(" = " + tmp); metaMap.put(name, tmp); break; } case Fn: { double tmp = reader.readFn(num); System.out.print(" = " + tmp); metaMap.put(name, tmp); break; } case En: { double tmp = reader.readEn(num); System.out.print(" = " + tmp); metaMap.put(name, tmp); break; } case Debug: { System.out.print(" = "); for (int i = 0; i < num; ++i) { final String tmp = reader.readAn(1); if (!tmp.isEmpty() && !tmp.equals(" ")) System.out.print(tmp); } System.out.println(); break; } default: { throw new IllegalBinaryFormatException("Unknown type " + type, reader.getCurrentPos()); } } System.out.println(); } } catch (Exception e) { if (e.getCause() != null) System.out.println(' ' + e.toString() + ':' + e.getCause().toString() + " for " + name); else System.out.println(' ' + e.toString() + ':' + " for " + name); //throw new IllegalBinaryFormatException(e.toString(), reader.getCurrentPos()); } } private Object get(final String name) { final Object obj = metaMap.get(name); if (obj == null && DEBUG_MODE) { System.out.println("metadata " + name + " is null"); } return obj; } public final String getAttributeString(final String name) { return (String) get(name); } public final Integer getAttributeInt(final String name) { return (Integer) get(name); } public final Double getAttributeDouble(final String name) { return (Double) get(name); } public final void set(final String name, final Object o) { metaMap.put(name, o); } /** * Read in the definition file * * @param mission sub folder * @param fileName definition file * @return xml document */ public static Document loadDefinitionFile(final String mission, final String fileName) { try { final File defFile = getResFile(mission, fileName); return XMLSupport.LoadXML(defFile.getAbsolutePath()); } catch (Exception e) { System.out.println(e.toString()); } return null; } private static File getResFile(final String mission, final String fileName) { final String homeUrl = ResourceUtils.findHomeFolder().getAbsolutePath(); final String path = homeUrl + File.separator + "resource" + File.separator + "ceos_db" + File.separator + mission + File.separator + fileName; return new File(path); } }