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 /*
  * Copyright 2010 JBoss 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 org.drools.runtime.process;
Represents the context when executing a process.
public interface ProcessContext extends KnowledgeContext {

    
Returns the process instance that is currently being executed in this context.

Returns:
the process instance that is currently being executed in this context
Returns the node instance that is currently being executed in this context, or null</node> if no node instance is currently being executed.

Returns:
the node instance that is currently being executed in this context
    NodeInstance getNodeInstance();

    
Returns the value of the variable with the given name. Based on the current node instance, it will try to resolve the given variable, taking nested variable scopes into account. Returns null if the variable could not be found.

Parameters:
variableName the name of the variable
Returns:
the value of the variable
    Object getVariable(String variableName);

    
Sets the value of the variable with the given name. Based on the current node instance, it will try to resolve the given variable, taking nested variable scopes into account. If the variable cannot be resolved, it will set the value as a process-level variable. It is however recommended to only use this with caution, as it is always recommended to define the variables that are used inside a process.

Parameters:
variableName the name of the variable
value the value of the variable
    void setVariable(String variableName,
                     Object value);
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