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1   /*
2    * Copyright (C) 2007-2012 Argeo GmbH
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *         http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.argeo.slc.execution;
17  
18  /** Deal with nested level of executions using different variables. */
19  public interface ExecutionStack {
20  	/**
21  	 * @param name
22  	 * @return null if no object is found
23  	 */
24  	public Object findScopedObject(String name);
25  
26  	public void addScopedObject(String name, Object obj);
27  
28  	public void enterFlow(ExecutionFlow executionFlow);
29  
30  	/** @return internal stack level UUID. */
31  	public String getCurrentStackLevelUuid();
32  
33  	public Integer getStackSize();
34  
35  	public void leaveFlow(ExecutionFlow executionFlow);
36  
37  	Object findLocalVariable(String key);
38  }