com.orientechnologies.orient.core.sql.query.OSQLSynchQuery Maven / Gradle / Ivy

/*
 *
 *  *  Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
 *  *
 *  *  Licensed under the Apache License, Version 2.0 (the "License");
 *  *  you may not use this file except in compliance with the License.
 *  *  You may obtain a copy of the License at
 *  *
 *  *       http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  *  Unless required by applicable law or agreed to in writing, software
 *  *  distributed under the License is distributed on an "AS IS" BASIS,
 *  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  *  See the License for the specific language governing permissions and
 *  *  limitations under the License.
 *  *
 *  * For more information: http://www.orientechnologies.com
 *
 */
package com.orientechnologies.orient.core.sql.query;

import com.orientechnologies.orient.core.command.OCommandResultListener;
import com.orientechnologies.orient.core.db.record.OIdentifiable;
import com.orientechnologies.orient.core.id.ORID;
import com.orientechnologies.orient.core.id.ORecordId;
import com.orientechnologies.orient.core.serialization.OMemoryStream;

import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

/**
 * SQL synchronous query. When executed the caller wait for the result.
 * 
 * @author Luca Garulli
 * 
 * @param 
 * @see OSQLAsynchQuery
 */
@SuppressWarnings({ "unchecked", "serial" })
public class OSQLSynchQuery extends OSQLAsynchQuery implements OCommandResultListener, Iterable {
  private final OResultSet result              = new OResultSet();
  private ORID                nextPageRID;
  private Map previousQueryParams = new HashMap();

  public OSQLSynchQuery() {
    resultListener = this;
  }

  public OSQLSynchQuery(final String iText) {
    super(iText);
    resultListener = this;
  }

  public OSQLSynchQuery(final String iText, final int iLimit) {
    super(iText, iLimit, null);
    resultListener = this;
  }

  @Override
  public void reset() {
    result.clear();
  }

  public boolean result(final Object iRecord) {
    if (iRecord != null)
      result.add((T) iRecord);
    return true;
  }

  @Override
  public void end() {
    result.setCompleted();
  }

  @Override
  public List run(final Object... iArgs) {
    result.clear();

    final Map queryParams;
    queryParams = fetchQueryParams(iArgs);
    resetNextRIDIfParametersWereChanged(queryParams);

    final List