StoredKeySet.java

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 2000-2005
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: StoredKeySet.java,v 12.1 2005/01/31 19:27:32 mark Exp $
 */

package com.sleepycat.collections;

import java.util.Set;

import com.sleepycat.bind.EntryBinding;
import com.sleepycat.db.Database;
import com.sleepycat.db.DatabaseException;
import com.sleepycat.db.OperationStatus;

public class StoredKeySet extends StoredCollection implements Set {

    public StoredKeySet(Database database, EntryBinding keyBinding,
                        boolean writeAllowed) {

        super(new DataView(database, keyBinding, null, null,
                           writeAllowed, null));
    }

    StoredKeySet(DataView keySetView) {

        super(keySetView);
    }

    public boolean add(Object key) {

        DataCursor cursor = null;
        boolean doAutoCommit = beginAutoCommit();
        try {
            cursor = new DataCursor(view, true);
            OperationStatus status = cursor.putNoOverwrite(key, null, false);
            closeCursor(cursor);
            commitAutoCommit(doAutoCommit);
            return (status == OperationStatus.SUCCESS);
        } catch (Exception e) {
            closeCursor(cursor);
            throw handleException(e, doAutoCommit);
        }
    }

    public boolean remove(Object key) {

        return removeKey(key, null);
    }

    public boolean contains(Object key) {

        return containsKey(key);
    }

    boolean hasValues() {

        return false;
    }

    Object makeIteratorData(StoredIterator iterator, DataCursor cursor)
        throws DatabaseException {

        return cursor.getCurrentKey();
    }

    boolean iterateDuplicates() {

        return false;
    }
}

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