ExecutionStack.java

   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 }