/*
 * Copyright 2010-2012 Luca Garulli (l.garulli--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.
 */
package com.orientechnologies.orient.object.db;

import com.orientechnologies.orient.core.command.OCommandContext;
import com.orientechnologies.orient.core.command.OCommandContext.TIMEOUT_STRATEGY;
import com.orientechnologies.orient.core.command.OCommandRequest;
import com.orientechnologies.orient.core.record.impl.ODocument;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/**
 * Wraps the execution of a generic command by assuring to convert the result set in POJO where applicable.
 * 
 * @author Luca Garulli (l.garulli--at--orientechnologies.com)
 * 
 */
public class OCommandSQLPojoWrapper implements OCommandRequest {
  private OCommandRequest          command;
  private ODatabasePojoAbstract<?> database;

  public OCommandSQLPojoWrapper(final ODatabasePojoAbstract<?> iDatabase, final OCommandRequest iCommand) {
    database = iDatabase;
    command = iCommand;
  }

  @SuppressWarnings("unchecked")
  public <RET> RET execute(Object... iArgs) {
    database.convertParameters(iArgs);

    Object result = command.execute(iArgs);

    if (result instanceof Collection<?>) {
      final List<Object> resultPojo = new ArrayList<Object>();

      Object obj;
      Collection<ODocument> coll = (Collection<ODocument>) result;
      for (ODocument doc : coll) {
        // GET THE ASSOCIATED DOCUMENT
        if (doc.getClassName() == null)
          obj = doc;
        else
          // CONVERT THE DOCUMENT INSIDE THE LIST
          obj = database.getUserObjectByRecord(doc, getFetchPlan(), true);

        resultPojo.add(obj);
      }
      result = resultPojo;

    } else if (result instanceof ODocument) {
      if (((ODocument) result).getClassName() != null)
        // CONVERT THE SINGLE DOCUMENT
        result = database.getUserObjectByRecord((ODocument) result, getFetchPlan(), true);
    }

    return (RET) result;
  }

  public int getLimit() {
    return command.getLimit();
  }

  public OCommandRequest setLimit(final int iLimit) {
    command.setLimit(iLimit);
    return this;
  }

  public boolean isIdempotent() {
    return command.isIdempotent();
  }

  @Override
  public String getFetchPlan() {
    return command.getFetchPlan();
  }

  @Override
  public <RET extends OCommandRequest> RET setFetchPlan(final String iFetchPlan) {
    command.setFetchPlan(iFetchPlan);
    return null;
  }

  @Override
  public void setUseCache(boolean iUseCache) {
    command.setUseCache(iUseCache);
  }

  @Override
  public OCommandContext getContext() {
    return command.getContext();
  }

  @Override
  public OCommandRequest setContext(final OCommandContext iContext) {
    command.setContext(iContext);
    return this;
  }

  @Override
  public long getTimeoutTime() {
    return command.getTimeoutTime();
  }

  @Override
  public TIMEOUT_STRATEGY getTimeoutStrategy() {
    return command.getTimeoutStrategy();
  }

  @Override
  public void setTimeout(long timeout, TIMEOUT_STRATEGY strategy) {
    command.setTimeout(timeout, strategy);
  }
}
