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218 lines
11 KiB
218 lines
11 KiB
// kelondroTables.java
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// -----------------------
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// (C) by Michael Peter Christen; mc@anomic.de
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2005
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// last major change: 13.03.2005
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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// this is mainly a convenience class to bundle many kelondroMap Objects
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package de.anomic.kelondro;
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import java.io.File;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map;
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public class kelondroTables {
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HashMap mTables, tTables, sTables;
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File tablesPath;
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public kelondroTables(File tablesPath) {
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this.mTables = new HashMap();
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this.tTables = new HashMap();
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this.sTables = new HashMap();
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this.tablesPath = tablesPath;
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if (!(tablesPath.exists())) tablesPath.mkdirs();
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}
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public void declareMaps(String tablename, int keysize, int nodesize, boolean exitOnFail) {
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declareMaps(tablename, keysize, nodesize, null, null, exitOnFail);
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}
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public void declareMaps(String tablename, int keysize, int nodesize, String[] sortfields, String[] accfields, boolean exitOnFail) {
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declareMaps(tablename, keysize, nodesize, sortfields, accfields, 0x800, exitOnFail);
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}
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public void declareMaps(String tablename, int keysize, int nodesize, String[] sortfields, String[] accfields, long buffersize /*bytes*/, boolean exitOnFail) {
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if (mTables.containsKey(tablename)) throw new RuntimeException("kelondroTables.declareMap: table '" + tablename + "' declared twice.");
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if (tTables.containsKey(tablename)) throw new RuntimeException("kelondroTables.declareMap: table '" + tablename + "' declared already in other context.");
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File tablefile = new File(tablesPath, "table." + tablename + ".mdb");
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kelondroDyn dyn;
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if (tablefile.exists()) try {
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dyn = new kelondroDyn(tablefile, buffersize);
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} catch (IOException e) {
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tablefile.getParentFile().mkdirs();
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dyn = new kelondroDyn(tablefile, buffersize, keysize, nodesize, exitOnFail);
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} else {
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tablefile.getParentFile().mkdirs();
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dyn = new kelondroDyn(tablefile, buffersize, keysize, nodesize, exitOnFail);
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}
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kelondroMap map = new kelondroMap(dyn, sortfields, accfields);
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mTables.put(tablename, map);
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}
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public void declareTree(String tablename, int[] columns, long buffersize /*bytes*/, boolean exitOnFail) {
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if (mTables.containsKey(tablename)) throw new RuntimeException("kelondroTables.declareTree: table '" + tablename + "' declared already in other context.");
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if (tTables.containsKey(tablename)) throw new RuntimeException("kelondroTables.declareTree: table '" + tablename + "' declared twice.");
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File tablefile = new File(tablesPath, "table." + tablename + ".tdb");
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kelondroTree Tree;
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if (tablefile.exists()) try {
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Tree = new kelondroTree(tablefile, buffersize);
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} catch (IOException e) {
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tablefile.getParentFile().mkdirs();
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Tree = new kelondroTree(tablefile, buffersize, columns, exitOnFail);
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} else {
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tablefile.getParentFile().mkdirs();
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Tree = new kelondroTree(tablefile, buffersize, columns, exitOnFail);
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}
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tTables.put(tablename, Tree);
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}
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public synchronized void update(String tablename, String key, Map map) throws IOException {
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kelondroMap table = (kelondroMap) mTables.get(tablename);
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if (table == null) throw new RuntimeException("kelondroTables.update: map table '" + tablename + "' does not exist.");
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if (key.length() > table.keySize()) key = key.substring(0, table.keySize());
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table.set(key, map);
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mTables.put(tablename, table);
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}
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public synchronized void update(String tablename, byte[][] row /* first element is the unique key = index */) throws IOException {
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kelondroTree tree = (kelondroTree) tTables.get(tablename);
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if (tree == null) throw new RuntimeException("kelondroTables.update: tree table '" + tablename + "' does not exist.");
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tree.put(row);
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tTables.put(tablename, tree);
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}
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public synchronized void update(String tablename, String key, long[] row) throws IOException {
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kelondroTree tree = (kelondroTree) tTables.get(tablename);
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if (tree == null) throw new RuntimeException("kelondroTables.update: tree table '" + tablename + "' does not exist.");
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tree.putLong(key.getBytes(), row);
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tTables.put(tablename, tree);
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}
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public synchronized Map selectMap(String tablename, String key) throws IOException {
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kelondroMap table = (kelondroMap) mTables.get(tablename);
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if (table == null) throw new RuntimeException("kelondroTables.selectMap: map table '" + tablename + "' does not exist.");
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if (key.length() > table.keySize()) key = key.substring(0, table.keySize());
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return table.get(key);
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}
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public synchronized byte[][] selectByte(String tablename, String key) throws IOException {
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kelondroTree tree = (kelondroTree) tTables.get(tablename);
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if (tree == null) throw new RuntimeException("kelondroTables.selectByte: tree table '" + tablename + "' does not exist.");
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return tree.get(key.getBytes());
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}
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public synchronized long[] selectLong(String tablename, String key) throws IOException {
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kelondroTree tree = (kelondroTree) tTables.get(tablename);
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if (tree == null) throw new RuntimeException("kelondroTables.selectLong: tree table '" + tablename + "' does not exist.");
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return tree.getLong(key.getBytes());
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}
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public synchronized kelondroMap.mapIterator /* of Map-Elements */ maps(String tablename, boolean up, boolean rotating) throws IOException {
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kelondroMap table = (kelondroMap) mTables.get(tablename);
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if (table == null) throw new RuntimeException("kelondroTables.maps: map table '" + tablename + "' does not exist.");
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return table.maps(up, rotating);
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}
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public synchronized kelondroMap.mapIterator /* of Map-Elements */ maps(String tablename, boolean up, boolean rotating, byte[] firstKey) {
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kelondroMap table = (kelondroMap) mTables.get(tablename);
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if (table == null) throw new RuntimeException("kelondroTables.maps: map table '" + tablename + "' does not exist.");
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return table.maps(up, rotating, firstKey);
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}
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public synchronized kelondroMap.mapIterator /* of Map-Elements */ maps(String tablename, boolean up, String field) {
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kelondroMap table = (kelondroMap) mTables.get(tablename);
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if (table == null) throw new RuntimeException("kelondroTables.maps: map table '" + tablename + "' does not exist.");
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return table.maps(up, field);
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}
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public synchronized Iterator /* of byte[][]-Elements */ rows(String tablename, boolean up, boolean rotating, byte[] firstKey) {
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kelondroTree tree = (kelondroTree) tTables.get(tablename);
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if (tree == null) throw new RuntimeException("kelondroTables.bytes: tree table '" + tablename + "' does not exist.");
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return tree.rows(up, rotating, firstKey);
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}
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public synchronized Iterator /* of byte[][]-Elements */ rows(String tablename, boolean up, boolean rotating) throws IOException {
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kelondroTree tree = (kelondroTree) tTables.get(tablename);
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if (tree == null) throw new RuntimeException("kelondroTables.selectOrderBy: tree table '" + tablename + "' does not exist.");
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return tree.rows(up, rotating);
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}
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// if you need the long-values from a row-iteration, please use kelondroRecords.bytes2long to convert from byte[] to long
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public synchronized void delete(String tablename, String key) throws IOException {
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kelondroMap table = (kelondroMap) mTables.get(tablename);
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if (key.length() > table.keySize()) key = key.substring(0, table.keySize());
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if (table != null) {table.remove(key); mTables.put(tablename, table); return;}
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kelondroTree Tree = (kelondroTree) tTables.get(tablename);
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if (Tree != null) {Tree.remove(key.getBytes()); tTables.put(tablename, Tree); return;}
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throw new RuntimeException("kelondroTables.delete: table '" + tablename + "' does not exist.");
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}
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public synchronized long accumulator(String tablename, String field) {
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kelondroMap table = (kelondroMap) mTables.get(tablename);
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if (table == null) throw new RuntimeException("kelondroTables.accumulator: map table '" + tablename + "' does not exist.");
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return table.getAcc(field);
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}
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public synchronized int size(String tablename) {
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kelondroMap table = (kelondroMap) mTables.get(tablename);
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if (table != null) return table.size();
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kelondroTree Tree = (kelondroTree) tTables.get(tablename);
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if (Tree != null) return Tree.size();
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throw new RuntimeException("kelondroTables.accumulator: table '" + tablename + "' does not exist.");
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}
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public void close() throws IOException {
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Iterator tablesIt = mTables.values().iterator();
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while (tablesIt.hasNext()) ((kelondroMap) tablesIt.next()).close();
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mTables = null;
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Iterator TreeIt = tTables.values().iterator();
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while (TreeIt.hasNext()) ((kelondroTree) TreeIt.next()).close();
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tTables = null;
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}
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}
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