List of prefixLookup() Examples

Examples of prefixLookup()

org.xtreemfs.babudb.api.database.Database.prefixLookup()
org.xtreemfs.babudb.api.database.DatabaseRO.prefixLookup()
Executes a prefix lookup. The result object contains an iterator to the database starting at the first matching key and returning key/value pairs in ascending order. @param indexId index id (0..NumIndices-1) @param key the key to start the iterator at @param context arbitrary context which is passed to the listener. @return a future as proxy for the request result.
org.xtreemfs.babudb.index.LSMTree.prefixLookup()
Performs a prefix lookup. Key-value paris are returned in an iterator in ascending key order, where only such keys are returned with a matching prefix according to the comparator. @param prefix the prefix @return an iterator with key-value pairs
org.xtreemfs.babudb.index.overlay.MultiOverlayBufferTree.prefixLookup()

Examples of org.xtreemfs.babudb.index.LSMTree.prefixLookup()

        // create, materialize and link a new snapshot
        snapId = tree.createSnapshot();
        tree.materializeSnapshot(SNAP_FILE3, snapId);
        tree.linkToSnapshot(SNAP_FILE3);
        
        it = tree.prefixLookup(new byte[0]);
        assertFalse(it.hasNext());
        
        tree.insert("test".getBytes(), "test".getBytes());
        tree.delete("test".getBytes());

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Examples of org.xtreemfs.babudb.index.LSMTree.prefixLookup()

        }
        
        // peform prefix lookups
        
        // current tree, ascending
        Iterator<Entry<byte[], byte[]>> it = tree.prefixLookup(new byte[0], true);
        Iterator<byte[]> itExpected = map3.values().iterator();
        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());

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Examples of org.xtreemfs.babudb.index.LSMTree.prefixLookup()

        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());
        
        // current tree, descending
        it = tree.prefixLookup(new byte[0], false);
        itExpected = map3.descendingMap().values().iterator();
        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());

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Examples of org.xtreemfs.babudb.index.LSMTree.prefixLookup()

        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());
        
        // snapshot 2, ascending
        it = tree.prefixLookup(new byte[0], snap2, true);
        itExpected = map2.values().iterator();
        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());

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Examples of org.xtreemfs.babudb.index.LSMTree.prefixLookup()

        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());
        
        // snapshot 2, descending
        it = tree.prefixLookup(new byte[0], snap2, false);
        itExpected = map2.descendingMap().values().iterator();
        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());

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Examples of org.xtreemfs.babudb.index.LSMTree.prefixLookup()

        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());
        
        // snapshot 1, ascending
        it = tree.prefixLookup(new byte[0], snap1, true);
        itExpected = map1.values().iterator();
        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());

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Examples of org.xtreemfs.babudb.index.LSMTree.prefixLookup()

        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());
        
        // snapshot 1, descending
        it = tree.prefixLookup(new byte[0], snap1, false);
        itExpected = map1.descendingMap().values().iterator();
        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());

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Examples of org.xtreemfs.babudb.index.LSMTree.prefixLookup()

        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());
        
        // real prefix lookup, current tree, ascending
        it = tree.prefixLookup("4".getBytes(), true);
        itExpected = map3.subMap("4".getBytes(), true, "5".getBytes(), false).values().iterator();
        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());

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Examples of org.xtreemfs.babudb.index.LSMTree.prefixLookup()

        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());
        
        // real prefix lookup, current tree, descending
        it = tree.prefixLookup("4".getBytes(), false);
        itExpected = map3.descendingMap().subMap("5".getBytes(), false, "4".getBytes(), true).values()
                .iterator();
        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());

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Examples of org.xtreemfs.babudb.index.LSMTree.prefixLookup()

        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());
        
        // real (empty) prefix lookup, current tree, ascending
        it = tree.prefixLookup("XXXXXXXX".getBytes(), true);
        itExpected = map3.subMap("XXXXXXXX".getBytes(), true, "XXXXXXXY".getBytes(), false).values()
                .iterator();
        while (it.hasNext())
            assertEquals(itExpected.next(), it.next().getValue());
        assertFalse(itExpected.hasNext());

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