// kelondroapTable.java
// -----------------------
// (C) by Michael Peter Christen; mc@anomic.de
// first published on http://www.anomic.de
// Frankfurt, Germany, 2005
// last major change: 13.03.2005
//
// 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 2 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, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Using this software in any meaning (reading, learning, copying, compiling,
// running) means that you agree that the Author(s) is (are) not responsible
// for cost, loss of data or any harm that may be caused directly or indirectly
// by usage of this softare or this documentation. The usage of this software
// is on your own risk. The installation and usage (starting/running) of this
// software may allow other people or application to access your computer and
// any attached devices and is highly dependent on the configuration of the
// software which must be done by the user of the software; the author(s) is
// (are) also not responsible for proper configuration and usage of the
// software, even if provoked by documentation provided together with
// the software.
//
// Any changes to this file according to the GPL as documented in the file
// gpl.txt aside this file in the shipment you received can be done to the
// lines that follows this copyright notice here, but changes must not be
// done inside the copyright notive above. A re-distribution must contain
// the intact and unchanged copyright notice.
// Contributions and changes to the program code must be marked as such.
// this is mainly a convenience class to bundle many kelondroMap Objects
package de.anomic.kelondro;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
public class kelondroMapTable {
HashMap mTables, tTables, sTables;
File tablesPath;
public kelondroMapTable(File tablesPath) {
this.mTables = new HashMap();
this.tTables = new HashMap();
this.sTables = new HashMap();
this.tablesPath = tablesPath;
if (!(tablesPath.exists())) tablesPath.mkdirs();
}
public void declareMaps(
String tablename, int keysize, int nodesize,
char fillChar, boolean exitOnFail) {
declareMaps(tablename, keysize, nodesize, null, null, fillChar, exitOnFail);
}
public void declareMaps(
String tablename, int keysize, int nodesize,
String[] sortfields, String[] accfields, char fillChar, boolean exitOnFail) {
declareMaps(tablename, keysize, nodesize, sortfields, accfields, fillChar, 0x800, 0, exitOnFail);
}
public void declareMaps(
String tablename, int keysize, int nodesize,
String[] sortfields, String[] accfields, char fillChar,
long buffersize /*bytes*/, long preloadTime, boolean exitOnFail) {
if (mTables.containsKey(tablename)) throw new RuntimeException("kelondroTables.declareMap: table '" + tablename + "' declared twice.");
if (tTables.containsKey(tablename)) throw new RuntimeException("kelondroTables.declareMap: table '" + tablename + "' declared already in other context.");
File tablefile = new File(tablesPath, "table." + tablename + ".mdb");
kelondroDyn dyn;
if (tablefile.exists()) try {
dyn = new kelondroDyn(tablefile, buffersize, preloadTime, fillChar);
} catch (IOException e) {
tablefile.getParentFile().mkdirs();
dyn = new kelondroDyn(tablefile, buffersize, preloadTime, keysize, nodesize, fillChar, exitOnFail);
} else {
tablefile.getParentFile().mkdirs();
dyn = new kelondroDyn(tablefile, buffersize, preloadTime, keysize, nodesize, fillChar, exitOnFail);
}
kelondroMap map = new kelondroMap(dyn, sortfields, accfields);
mTables.put(tablename, map);
}
public void declareTree(String tablename, kelondroRow rowdef, long buffersize /*bytes*/, long preloadTime, boolean exitOnFail) {
if (mTables.containsKey(tablename)) throw new RuntimeException("kelondroTables.declareTree: table '" + tablename + "' declared already in other context.");
if (tTables.containsKey(tablename)) throw new RuntimeException("kelondroTables.declareTree: table '" + tablename + "' declared twice.");
File tablefile = new File(tablesPath, "table." + tablename + ".tdb");
kelondroTree Tree;
if (tablefile.exists()) try {
Tree = new kelondroTree(tablefile, buffersize, preloadTime, kelondroTree.defaultObjectCachePercent);
} catch (IOException e) {
tablefile.getParentFile().mkdirs();
Tree = new kelondroTree(tablefile, buffersize, preloadTime, kelondroTree.defaultObjectCachePercent, rowdef, exitOnFail);
} else {
tablefile.getParentFile().mkdirs();
Tree = new kelondroTree(tablefile, buffersize, preloadTime, kelondroTree.defaultObjectCachePercent, rowdef, exitOnFail);
}
tTables.put(tablename, Tree);
}
public synchronized void update(String tablename, String key, Map map) throws IOException {
kelondroMap table = (kelondroMap) mTables.get(tablename);
if (table == null) throw new RuntimeException("kelondroTables.update: map table '" + tablename + "' does not exist.");
if (key.length() > table.keySize()) key = key.substring(0, table.keySize());
table.set(key, map);
mTables.put(tablename, table);
}
public synchronized void update(String tablename, kelondroRow.Entry row /* first element is the unique key = index */) throws IOException {
kelondroTree tree = (kelondroTree) tTables.get(tablename);
if (tree == null) throw new RuntimeException("kelondroTables.update: tree table '" + tablename + "' does not exist.");
tree.put(row);
tTables.put(tablename, tree);
}
public synchronized Map selectMap(String tablename, String key) throws IOException {
kelondroMap table = (kelondroMap) mTables.get(tablename);
if (table == null) throw new RuntimeException("kelondroTables.selectMap: map table '" + tablename + "' does not exist.");
if (key.length() > table.keySize()) key = key.substring(0, table.keySize());
return table.get(key);
}
public synchronized kelondroRow.Entry selectByte(String tablename, String key) throws IOException {
kelondroTree tree = (kelondroTree) tTables.get(tablename);
if (tree == null) throw new RuntimeException("kelondroTables.selectByte: tree table '" + tablename + "' does not exist.");
return tree.get(key.getBytes());
}
public synchronized kelondroMap.mapIterator /* of Map-Elements */ maps(String tablename, boolean up, boolean rotating) throws IOException {
kelondroMap table = (kelondroMap) mTables.get(tablename);
if (table == null) throw new RuntimeException("kelondroTables.maps: map table '" + tablename + "' does not exist.");
return table.maps(up, rotating);
}
public synchronized kelondroMap.mapIterator /* of Map-Elements */ maps(String tablename, boolean up, boolean rotating, byte[] firstKey) throws IOException {
kelondroMap table = (kelondroMap) mTables.get(tablename);
if (table == null) throw new RuntimeException("kelondroTables.maps: map table '" + tablename + "' does not exist.");
return table.maps(up, rotating, firstKey);
}
public synchronized kelondroMap.mapIterator /* of Map-Elements */ maps(String tablename, boolean up, String field) {
kelondroMap table = (kelondroMap) mTables.get(tablename);
if (table == null) throw new RuntimeException("kelondroTables.maps: map table '" + tablename + "' does not exist.");
return table.maps(up, field);
}
public synchronized Iterator /* of kelondroRow.Entry-Elements */ rows(String tablename, boolean up, boolean rotating, byte[] firstKey) throws IOException {
kelondroTree tree = (kelondroTree) tTables.get(tablename);
if (tree == null) throw new RuntimeException("kelondroTables.bytes: tree table '" + tablename + "' does not exist.");
return tree.rows(up, rotating, firstKey);
}
// if you need the long-values from a row-iteration, please use kelondroRecords.bytes2long to convert from byte[] to long
public synchronized void delete(String tablename, String key) throws IOException {
kelondroMap table = (kelondroMap) mTables.get(tablename);
if (key.length() > table.keySize()) key = key.substring(0, table.keySize());
if (table != null) {table.remove(key); mTables.put(tablename, table); return;}
kelondroTree Tree = (kelondroTree) tTables.get(tablename);
if (Tree != null) {Tree.remove(key.getBytes()); tTables.put(tablename, Tree); return;}
throw new RuntimeException("kelondroTables.delete: table '" + tablename + "' does not exist.");
}
public synchronized long accumulator(String tablename, String field) {
kelondroMap table = (kelondroMap) mTables.get(tablename);
if (table == null) throw new RuntimeException("kelondroTables.accumulator: map table '" + tablename + "' does not exist.");
return table.getAcc(field);
}
public synchronized int size(String tablename) {
kelondroMap table = (kelondroMap) mTables.get(tablename);
if (table != null) return table.size();
kelondroTree Tree = (kelondroTree) tTables.get(tablename);
if (Tree != null) return Tree.size();
throw new RuntimeException("kelondroTables.accumulator: table '" + tablename + "' does not exist.");
}
public void close() throws IOException {
Iterator tablesIt = mTables.values().iterator();
while (tablesIt.hasNext()) ((kelondroMap) tablesIt.next()).close();
mTables = null;
Iterator TreeIt = tTables.values().iterator();
while (TreeIt.hasNext()) ((kelondroTree) TreeIt.next()).close();
tTables = null;
}
}