Examples with Cursor jetbrains.exodus.env.Cursor used on opensource projects

Example 21 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class PropertyRangeIterable method countImpl.

@Override
protected long countImpl(@NotNull final PersistentStoreTransaction txn) {
    final Cursor cursor = openCursor(txn);
    if (cursor == null) {
        return 0;
    }
    try {
        final PropertyValue propertyValue = getStore().getPropertyTypes().dataToPropertyValue(min);
        final ComparableBinding binding = propertyValue.getBinding();
        long result = 0;
        boolean success = cursor.getSearchKeyRange(propertyValue.dataToEntry()) != null;
        while (success && max.compareTo(binding.entryToObject(cursor.getKey())) >= 0) {
            result += cursor.count();
            success = cursor.getNextNoDup();
        }
        return result;
    } finally {
        cursor.close();
    }
}

Example 22 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class PropertyValueIterable method countImpl.

@Override
protected long countImpl(@NotNull final PersistentStoreTransaction txn) {
    final ByteIterable key = getStore().getPropertyTypes().dataToPropertyValue(value).dataToEntry();
    final Cursor valueIdx = openCursor(txn);
    return valueIdx == null ? 0 : new SingleKeyCursorCounter(valueIdx, key).getCount();
}

Example 23 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class EntityIteratorBase method dispose.

@Override
public boolean dispose() {
    queryCancellingPolicy = null;
    if (!disposed) {
        disposed = true;
        final PersistentStoreTransaction txn = iterable.getStore().getCurrentTransaction();
        // txn is null if dispose is called from PersistentStoreTransaction.close()
        if (txn != null) {
            txn.deregisterEntityIterator(this);
        }
        final Cursor cursor = this.cursor;
        if (cursor != null) {
            cursor.close();
            this.cursor = null;
        }
        return true;
    }
    return false;
}

Example 24 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class BTreeSpecificCursorNoDuplicatesTest method testGetSearchKeyRange3.

@Test
public void testGetSearchKeyRange3() throws IOException {
    tm = createEmptyTreeForCursor(1).getMutableCopy();
    getTreeMutable().put(kv(1, "v1"));
    getTreeMutable().put(kv(2, "v2"));
    getTreeMutable().put(kv(3, "v3"));
    getTreeMutable().put(kv(5, "v5"));
    getTreeMutable().put(kv(6, "v6"));
    getTreeMutable().put(kv(7, "v7"));
    assertMatches(getTreeMutable(), IP(BP(3), BP(3)));
    final TreeAwareRunnable getSearchKeyRange = new TreeAwareRunnable(getTreeMutable()) {

        @Override
        public void run() {
            Cursor c = _t.openCursor();
            assertEquals(value("v5"), c.getSearchKeyRange(key(4)));
            assertEquals(key(5), c.getKey());
        }
    };
    getSearchKeyRange.run();
    long a = saveTree();
    getSearchKeyRange.run();
    reopen();
    getSearchKeyRange.setTree(openTree(a, true));
    getSearchKeyRange.run();
}

Example 25 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class PropertyRangeIterable method getIteratorImpl.

@Override
@NotNull
public EntityIteratorBase getIteratorImpl(@NotNull final PersistentStoreTransaction txn) {
    final EntityIterableBase it = getPropertyValueIndex();
    if (it.isCachedInstance()) {
        final Class<? extends Comparable> minClass = min.getClass();
        final Class<? extends Comparable> maxClass = max.getClass();
        final UpdatablePropertiesCachedInstanceIterable cached = (UpdatablePropertiesCachedInstanceIterable) it;
        if (minClass != maxClass || minClass != cached.getPropertyValueClass()) {
            return EntityIteratorBase.EMPTY;
        }
        return cached.getPropertyRangeIterator(min, max);
    }
    final Cursor valueIdx = openCursor(txn);
    if (valueIdx == null) {
        return EntityIteratorBase.EMPTY;
    }
    return new PropertyRangeIterator(valueIdx);
}