SimpleEvaluationEnvironment.java

/*
 * Copyright (C) 2012 Google Inc.
 *
 * 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 interactivespaces.evaluation;

import com.google.common.collect.Maps;

import java.util.Map;

/**
 * A standalone {@link EvaluationEnvironment}.
 *
 * @author Keith M. Hughes
 * @since Jul 25, 2012
 */
public class SimpleEvaluationEnvironment implements EvaluationEnvironment {

  /**
   * The map of values for the environment.
   */
  private Map<String, String> values = Maps.newHashMap();

  @Override
  public String lookupVariableValue(String variable) throws EvaluationInteractiveSpacesException {
    return values.get(variable);
  }

  /**
   * Set the value of a variable.
   *
   * @param variable
   *          the name of the variable
   * @param value
   *          the value of the variable
   */
  public void set(String variable, String value) {
    values.put(variable, value);
  }
}