/*
 * 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.core.sql;

import java.util.Locale;
import java.util.Map;

import com.orientechnologies.orient.core.command.OCommandContext;
import com.orientechnologies.orient.core.command.OCommandExecutorNotFoundException;
import com.orientechnologies.orient.core.command.OCommandRequest;
import com.orientechnologies.orient.core.command.OCommandRequestText;
import com.orientechnologies.orient.core.exception.OCommandExecutionException;

/**
 * SQL UPDATE command.
 * 
 * @author Luca Garulli
 * 
 */
public class OCommandExecutorSQLDelegate extends OCommandExecutorSQLAbstract {
  protected OCommandExecutorSQLAbstract delegate;

  @SuppressWarnings("unchecked")
  public OCommandExecutorSQLDelegate parse(final OCommandRequest iCommand) {
    if (iCommand instanceof OCommandRequestText) {
      final OCommandRequestText textRequest = (OCommandRequestText) iCommand;
      final String text = textRequest.getText();
      final String textUpperCase = text.toUpperCase(Locale.ENGLISH);

      delegate = (OCommandExecutorSQLAbstract) OSQLEngine.getInstance().getCommand(textUpperCase);
      if (delegate == null)
        throw new OCommandExecutorNotFoundException("Cannot find a command executor for the command request: " + iCommand);

      delegate.setContext(context);
      delegate.setLimit(iCommand.getLimit());
      delegate.parse(iCommand);
      delegate.setProgressListener(progressListener);
    } else
      throw new OCommandExecutionException("Cannot find a command executor for the command request: " + iCommand);
    return this;
  }

  public Object execute(final Map<Object, Object> iArgs) {
    return delegate.execute(iArgs);
  }

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

  @Override
  public String toString() {
    return delegate.toString();
  }

  public String getSyntax() {
    return delegate.getSyntax();
  }

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

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

  public OCommandExecutorSQLAbstract getDelegate() {
    return delegate;
  }
}
