/*
  *
  *  *  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;

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

/**
 * Container of arguments. Manages also the ordinal arguments.
 * 
 * @author Luca Garulli
 * 
 */
public class OCommandParameters implements Iterable<Map.Entry<Object, Object>> {
  private final Map<Object, Object> parameters;
  private int                       counter = 0;

  public OCommandParameters() {
    parameters = new HashMap<Object, Object>();
  }

  public OCommandParameters(final Map<Object, Object> iArgs) {
    if (iArgs != null)
      parameters = iArgs;
    else
      parameters = new HashMap<Object, Object>();
  }

  public void set(final Object k, final Object v) {
    parameters.put(k, v);
  }

  public Object getByName(final Object iName) {
    return parameters.get(iName);
  }

  public Object getNext() {
    if (parameters.size() <= counter)
      throw new IndexOutOfBoundsException("Parameter " + counter + " not found. Total parameters received: " + parameters.size());

    return parameters.get(counter++);
  }

  public Iterator<Entry<Object, Object>> iterator() {
    return parameters.entrySet().iterator();
  }

  public int size() {
    return parameters.size();
  }

  public void reset() {
    counter = 0;
  }
}