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git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4847 6c8d7289-2bf4-0310-a012-ef5d649a1542
79 lines
4.1 KiB
Java
79 lines
4.1 KiB
Java
// kelondroIndex.java
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// ------------------
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// part of the Kelondro Database
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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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// created: 26.10.2005
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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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/* A kelondroIndex is a table with indexed access on the first column
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Elements may be selected from the table with logarithmic computation time
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using the get-method. Inserts have also the same computation order and
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can be done with the put-method.
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The kelondro Database provides two implementations of this interface:
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kelondroTree and kelondroHashtable
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*/
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package de.anomic.kelondro;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.List;
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public interface kelondroIndex {
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public String filename(); // returns a unique identified for this index; can be a real or artificial file name
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public int size();
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public kelondroProfile profile();
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public kelondroRow row();
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public boolean has(byte[] key) throws IOException; // use this only if there is no get in case that has returns true
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public kelondroRow.Entry get(byte[] key) throws IOException;
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public kelondroRow.Entry put(kelondroRow.Entry row) throws IOException;
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public kelondroRow.Entry put(kelondroRow.Entry row, Date entryDate) throws IOException;
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public void putMultiple(List<kelondroRow.Entry> rows) throws IOException; // for R/W head path optimization
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public boolean addUnique(kelondroRow.Entry row) throws IOException; // no double-check
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public int addUniqueMultiple(List<kelondroRow.Entry> rows) throws IOException; // no double-check
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public ArrayList<kelondroRowCollection> removeDoubles() throws IOException; // removes all elements that are double (to be used after all addUnique)
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public kelondroRow.Entry remove(byte[] key, boolean keepOrder) throws IOException;
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public kelondroRow.Entry removeOne() throws IOException;
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public kelondroCloneableIterator<byte[]> keys(boolean up, byte[] firstKey) throws IOException; // iterates only the key
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public kelondroCloneableIterator<kelondroRow.Entry> rows(boolean up, byte[] firstKey) throws IOException; // iterates the whole row
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public void clear() throws IOException;
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public void close();
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}
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