Java EntityIndex类代码示例

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
public String[] inLinks(String URL) throws DatabaseException {
  EntityIndex<String, Link> subIndex = inLinkIndex.subIndex(URL);
  // System.out.println(subIndex.count());
  String[] linkList = new String[(int) subIndex.count()];
  int i = 0;
  EntityCursor<Link> cursor = subIndex.entities();
  try {
    for (Link entity : cursor) {
      linkList[i++] = entity.fromURL;
      // System.out.println(entity.fromURL);
    }
  } finally {
    cursor.close();
  }
  return linkList;
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
/**
 * Do range query, similar to the SQL statement:
 * <blockquote><pre>
 * SELECT * FROM table WHERE col >= fromKey AND col <= toKey;
 * </pre></blockquote>
 *
 * @param index
 * @param fromKey
 * @param fromInclusive
 * @param toKey
 * @param toInclusive
 * @return
 * @throws DatabaseException
 */
public <K, V> EntityCursor<V> doRangeQuery(EntityIndex<K, V> index,
                                           K fromKey,
                                           boolean fromInclusive,
                                           K toKey,
                                           boolean toInclusive)
    throws DatabaseException {

    assert (index != null);

    /* Opens a cursor for traversing entities in a key range. */
    return index.entities(fromKey,
                          fromInclusive,
                          toKey,
                          toInclusive);
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
public JECursorAdapter(Context context, 
                       int textViewResourceId, 
                       EntityCursor<K> keyCursor,
                       EntityCursor<E> valueCursor,
                       EntityIndex<K, E> primaryIndex) {

    this.context = context;
    this.inflater = (LayoutInflater)
        context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    this.resource = textViewResourceId;
    this.fieldId = 0;
    this.valueCursor = valueCursor;
    this.valueCursor.first();
    this.currentCursorPosition = 0;
    this.keyCursor = keyCursor;
    this.keyCursor.first();
    this.primaryIndex = primaryIndex;
    this.itemsCount = -1;
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
/**
 * Opens or creates a sequence.
 * 
 * This method tries to open an existing sequence or create a new sequence with starting value
 * of the next available id number in the specified index.
 * 
 * @param entityStore The store that contains the sequence.
 * @param index The index which is used to initialize the starting value.
 * @param sequenceName The name of the sequence.
 * @return The opened or created sequence.
 */
public static Sequence openSequence(EntityStore entityStore, EntityIndex<Long, ?> index, 
        String sequenceName) {
    Sequence seq = null;
    try {
        seq = entityStore.getSequence(sequenceName);
    } catch (SequenceNotFoundException ex) {
        // Establish current value
        long initialValue = DatabaseUtils.getMaxId(index) +  1;

        entityStore.setSequenceConfig(sequenceName, 
                SequenceConfig.DEFAULT.setAllowCreate(true).setInitialValue(initialValue));
        seq = entityStore.getSequence(sequenceName);
    } finally {
        if (seq == null) {
            throw new RuntimeException("Could not open sequence localIdSequence.");
        }

        return seq;
    }
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
/**
 * Do prefix query, similar to the SQL statement:
 * <blockquote><pre>
 * SELECT * FROM table WHERE col LIKE 'prefix%';
 * </pre></blockquote>
 */
public <V> EntityCursor<V> query(EntityIndex<String, V> index, String prefix) {
    checkArgument(!Strs.isBlank(prefix));
    
    char[] ca = prefix.toCharArray();
    final int lastCharIndex = ca.length - 1;
    ca[lastCharIndex]++;
    return query(index, prefix, true, String.valueOf(ca), false);
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
private <K,V> void checkClosedRanges(Transaction txn, int i, int j,
                                     EntityIndex<K,V> index,
                                     SortedMap<Integer,SortedSet<Integer>>
                                     expected,
                                     Getter<K> kGetter,
                                     Getter<V> vGetter)
    throws DatabaseException {

    SortedMap<K,V> map = index.sortedMap();
    SortedMap<Integer,SortedSet<Integer>> rangeExpected;
    K k = kGetter.fromInt(i);
    K kPlusOne = kGetter.fromInt(i + 1);
    K l = kGetter.fromInt(j);
    K lPlusOne = kGetter.fromInt(j + 1);

    /* Sub range exclusive. */
    rangeExpected = expected.subMap(i + 1, j);
    checkCursor
        (index.keys(txn, k, false, l, false, null),
         map.subMap(kPlusOne, l).keySet(), true,
         expandKeys(rangeExpected), kGetter);
    checkCursor
        (index.entities(txn, k, false, l, false, null),
         map.subMap(kPlusOne, l).values(), false,
         expandValues(rangeExpected), vGetter);

    /* Sub range inclusive. */
    rangeExpected = expected.subMap(i, j + 1);
    checkCursor
        (index.keys(txn, k, true, l, true, null),
         map.subMap(k, lPlusOne).keySet(), true,
         expandKeys(rangeExpected), kGetter);
    checkCursor
        (index.entities(txn, k, true, l, true, null),
         map.subMap(k, lPlusOne).values(), false,
         expandValues(rangeExpected), vGetter);
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
private <K,V> void checkEmpty(EntityIndex<K,V> index)
    throws DatabaseException {

    EntityCursor<K> keys = index.keys();
    assertNull(keys.next());
    assertTrue(!keys.iterator().hasNext());
    keys.close();
    EntityCursor<V> entities = index.entities();
    assertNull(entities.next());
    assertTrue(!entities.iterator().hasNext());
    entities.close();
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
public List<MapsToRelationship> getMapsToRelationshipsByConceptId2(int conceptId) {
	EntityIndex<Integer, MapsToRelationship> subIndex = mapsToRelationshipDataAccessor.secondaryIndex.subIndex(conceptId);
	EntityCursor<MapsToRelationship> cursor = subIndex.entities();
	List<MapsToRelationship> relationships = new ArrayList<MapsToRelationship>();
	try {
		for (MapsToRelationship relationship : cursor)
			relationships.add(relationship);
	} finally {
		cursor.close();
	}
	return relationships;
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
public List<ParentChildRelationShip> getParentChildRelationshipsByParentConceptId(int conceptId) {
	EntityIndex<Integer, ParentChildRelationShip> subIndex = parentChildRelationshipDataAccessor.secondaryIndexParent.subIndex(conceptId);
	EntityCursor<ParentChildRelationShip> cursor = subIndex.entities();
	List<ParentChildRelationShip> relationships = new ArrayList<ParentChildRelationShip>();
	try {
		for (ParentChildRelationShip relationship : cursor)
			relationships.add(relationship);
	} finally {
		cursor.close();
	}
	return relationships;
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
public List<ParentChildRelationShip> getParentChildRelationshipsByChildConceptId(int conceptId) {
	EntityIndex<Integer, ParentChildRelationShip> subIndex = parentChildRelationshipDataAccessor.secondaryIndexChild.subIndex(conceptId);
	EntityCursor<ParentChildRelationShip> cursor = subIndex.entities();
	List<ParentChildRelationShip> relationships = new ArrayList<ParentChildRelationShip>();
	try {
		for (ParentChildRelationShip relationship : cursor)
			relationships.add(relationship);
	} finally {
		cursor.close();
	}
	return relationships;
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
/**
 * Do prefix query, similar to the SQL statement:
 * <blockquote><pre>
 * SELECT * FROM table WHERE col LIKE 'prefix%';
 * </pre></blockquote>
 *
 * @param index
 * @param prefix
 * @return
 * @throws DatabaseException
 */
public <V> EntityCursor<V> doPrefixQuery(EntityIndex<String, V> index,
                                         String prefix)
    throws DatabaseException {

    assert (index != null);
    assert (prefix.length() > 0);

    /* Opens a cursor for traversing entities in a key range. */
    char[] ca = prefix.toCharArray();
    final int lastCharIndex = ca.length - 1;
    ca[lastCharIndex]++;
    return doRangeQuery(index, prefix, true, String.valueOf(ca), false);
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
/**
 * Returns the highest key value in the index greater than zero.
 * 
 * This method will return at least 0.
 * 
 * @param index The index to scan.
 * @return The highest key, but at least 0.
 */
public static long getMaxId(EntityIndex<Long, ?> index) {
    long maxId = 0;
    for (long id : index.keys()) {
        if (id > maxId) {
            maxId = id;
        }
    }

    return maxId;
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
public Set<PhraseEntry> get_phrases(String[][] refwdsAr, 
				String[][] hypwdsAr) {
HashSet<PhraseEntry> toret = new HashSet<PhraseEntry>();
HashSet<String> searched = new HashSet<String>();

HashSet<Integer> hypset = new HashSet<Integer>();
for (String[] hypwds : hypwdsAr) {
    Integer[] hypids = phraseStrToInt(hypwds);
    hypset.addAll(Arrays.asList(hypids));
}
for (String[] refwds : refwdsAr) {
    Integer[] refids = phraseStrToInt(refwds);
    try {		
	List<Integer> li = Arrays.asList(refids);		
	for (int i = 0; i < refids.length; i++) {
	    WordInfo wi = wordById.get(refids[i]);
	    int max_len = 0;
	    if (wi != null) {
		max_len = wi.maxlen;
		if ((i+max_len) > refids.length) 
		    max_len = refids.length - i;
	    }
	    
	    for (int j = i; j < (max_len + i); j++) {
		String searchkey = sjoin(refids, i, j);
		if (searched.contains(searchkey)) continue;
		searched.add(searchkey);
		
		EntityIndex<Integer,PhraseNumEntry> subIndex = 
		    phraseByRef.subIndex(sjoin(refids, i, j));
		EntityCursor<PhraseNumEntry> cursor = subIndex.entities();
		try {
		    for (PhraseNumEntry pe : cursor) {
			boolean ok = true;
			for (int hw : pe.getHypIds()) {
			    if (! hypset.contains(hw)) {
				ok = false;
				break;
			    }    
			}
			if (ok) {
			    toret.add(convertPhraseEntry(pe));
			}
		    }
		} finally {
		    cursor.close();
		}
	    }
	}
    } catch(DatabaseException dbe) {
	closeDB();
	System.err.println("Error scanning database(" + base + 
			   "): " + dbe.toString());
	System.exit(-1);
    }
}
return toret;
   }
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
private <K,V> void checkOpenRanges(Transaction txn, int i,
                                   EntityIndex<K,V> index,
                                   SortedMap<Integer,SortedSet<Integer>>
                                   expected,
                                   Getter<K> kGetter,
                                   Getter<V> vGetter)
    throws DatabaseException {

    SortedMap<K,V> map = index.sortedMap();
    SortedMap<Integer,SortedSet<Integer>> rangeExpected;
    K k = kGetter.fromInt(i);
    K kPlusOne = kGetter.fromInt(i + 1);

    /* Head range exclusive. */
    rangeExpected = expected.headMap(i);
    checkCursor
        (index.keys(txn, null, false, k, false, null),
         map.headMap(k).keySet(), true,
         expandKeys(rangeExpected), kGetter);
    checkCursor
        (index.entities(txn, null, false, k, false, null),
         map.headMap(k).values(), false,
         expandValues(rangeExpected), vGetter);

    /* Head range inclusive. */
    rangeExpected = expected.headMap(i + 1);
    checkCursor
        (index.keys(txn, null, false, k, true, null),
         map.headMap(kPlusOne).keySet(), true,
         expandKeys(rangeExpected), kGetter);
    checkCursor
        (index.entities(txn, null, false, k, true, null),
         map.headMap(kPlusOne).values(), false,
         expandValues(rangeExpected), vGetter);

    /* Tail range exclusive. */
    rangeExpected = expected.tailMap(i + 1);
    checkCursor
        (index.keys(txn, k, false, null, false, null),
         map.tailMap(kPlusOne).keySet(), true,
         expandKeys(rangeExpected), kGetter);
    checkCursor
        (index.entities(txn, k, false, null, false, null),
         map.tailMap(kPlusOne).values(), false,
         expandValues(rangeExpected), vGetter);

    /* Tail range inclusive. */
    rangeExpected = expected.tailMap(i);
    checkCursor
        (index.keys(txn, k, true, null, false, null),
         map.tailMap(k).keySet(), true,
         expandKeys(rangeExpected), kGetter);
    checkCursor
        (index.entities(txn, k, true, null, false, null),
         map.tailMap(k).values(), false,
         expandValues(rangeExpected), vGetter);
}
 

import com.sleepycat.persist.EntityIndex; //导入依赖的package包/类
public void testDeleteFromSubIndex()
    throws DatabaseException {

    open();

    PrimaryIndex<Integer,MyEntity> priIndex =
        store.getPrimaryIndex(Integer.class, MyEntity.class);

    SecondaryIndex<Integer,Integer,MyEntity> secIndex =
        store.getSecondaryIndex(priIndex, Integer.class, "secKey");

    Transaction txn = txnBegin();
    MyEntity e = new MyEntity();
    e.secKey = 1;
    e.priKey = 1;
    priIndex.put(txn, e);
    e.priKey = 2;
    priIndex.put(txn, e);
    e.priKey = 3;
    priIndex.put(txn, e);
    e.priKey = 4;
    priIndex.put(txn, e);
    txnCommit(txn);

    EntityIndex<Integer,MyEntity> subIndex = secIndex.subIndex(1);
    txn = txnBeginCursor();
    e = subIndex.get(txn, 1, null);
    assertEquals(1, e.priKey);
    assertEquals(Integer.valueOf(1), e.secKey);
    e = subIndex.get(txn, 2, null);
    assertEquals(2, e.priKey);
    assertEquals(Integer.valueOf(1), e.secKey);
    e = subIndex.get(txn, 3, null);
    assertEquals(3, e.priKey);
    assertEquals(Integer.valueOf(1), e.secKey);
    e = subIndex.get(txn, 5, null);
    assertNull(e);

    boolean deleted = subIndex.delete(txn, 1);
    assertTrue(deleted);
    assertNull(subIndex.get(txn, 1, null));
    assertNotNull(subIndex.get(txn, 2, null));

    EntityCursor<MyEntity> cursor = subIndex.entities(txn, null);
    boolean saw4 = false;
    for (MyEntity e2 = cursor.first(); e2 != null; e2 = cursor.next()) {
        if (e2.priKey == 3) {
            cursor.delete();
        }
        if (e2.priKey == 4) {
            saw4 = true;
        }
    }
    cursor.close();
    assertTrue(saw4);
    assertNull(subIndex.get(txn, 1, null));
    assertNull(subIndex.get(txn, 3, null));
    assertNotNull(subIndex.get(txn, 2, null));
    assertNotNull(subIndex.get(txn, 4, null));

    txnCommit(txn);
    close();
}