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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * 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. See accompanying
 * LICENSE file.
 */
package com.gemstone.gemfire.cache.query.internal;

import com.gemstone.gemfire.cache.query.FunctionDomainException;
import com.gemstone.gemfire.cache.query.IndexType;
import com.gemstone.gemfire.cache.query.NameResolutionException;
import com.gemstone.gemfire.cache.query.QueryInvocationTargetException;
import com.gemstone.gemfire.cache.query.TypeMismatchException;
import com.gemstone.gemfire.cache.query.internal.index.AbstractIndex;
import com.gemstone.gemfire.cache.query.internal.index.IndexProtocol;
import com.gemstone.gemfire.cache.query.internal.parse.OQLLexerTokenTypes;

public class IndexInfo
{
  final private CompiledValue _key;

  final CompiledValue _path;

  final int _operator;

  final IndexProtocol _index;

  final int _matchLevel;

  final int[] mapping;

  IndexInfo(CompiledValue key, CompiledValue path, IndexProtocol index,
      int matchLevel, int mapping[], int op) {
    _key = key;
    _path = path;
    _operator = op;
    _index = index;
    _matchLevel = matchLevel;
    this.mapping = mapping;
  }
  
  Object evaluateIndexKey(ExecutionContext context) throws FunctionDomainException, TypeMismatchException, NameResolutionException, QueryInvocationTargetException {
    if(((AbstractIndex)_index).isMapType()) {
       //assert _path.getType() == OQLLexerTokenTypes.METHOD_INV;
       //Get the map key & value. both need to be passed as index key.      
       CompiledValue mapKey = ((MapIndexable)this._path).getMapLookupKey();
       return new Object[]{ this._key.evaluate(context),mapKey.evaluate(context)};
    }else {
      return _key.evaluate(context);
    }
  }
  
  public CompiledValue _key() {
    return this._key;
  }
   
  public CompiledValue _path() {
    return this._path;
  }

  public int _operator() {
    return this._operator;
  }

  public IndexProtocol _getIndex() {
    return _index;
  }
}