/**
* Copyright (c) 2014 - 2017 Frank Appel
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Frank Appel - initial API and implementation
*/
package com.codeaffine.workflow.persistence.internal;
import static com.codeaffine.workflow.WorkflowContext.VARIABLE_SERVICE;
import java.util.HashMap;
import com.codeaffine.workflow.Workflow;
import com.codeaffine.workflow.WorkflowContext;
import com.codeaffine.workflow.WorkflowService;
import com.codeaffine.workflow.definition.VariableDeclaration;
import com.codeaffine.workflow.persistence.WorkflowServiceAdapter;
class ServiceScopedVariableBuffer {
private final HashMap<VariableDeclaration<Object>, Object> buffer;
ServiceScopedVariableBuffer() {
this.buffer = new HashMap<VariableDeclaration<Object>, Object>();
}
void buffer( Workflow workflow ) {
WorkflowContext context = workflow.getContext();
if( context.hasVariableDefinition( VARIABLE_SERVICE ) ) {
VariableDeclaration<Object>[] declarations = getDeclarations( context );
for( VariableDeclaration<Object> declaration : declarations ) {
buffer.put( declaration, context.getVariableValue( declaration ) );
}
}
}
void restore( Workflow workflow ) {
WorkflowContext context = workflow.getContext();
if( !buffer.isEmpty() ) {
for( VariableDeclaration<Object> declaration : buffer.keySet() ) {
context.defineVariable( declaration, buffer.get( declaration ) );
}
}
buffer.clear();
}
@SuppressWarnings("unchecked")
private static VariableDeclaration<Object>[] getDeclarations( WorkflowContext context ) {
WorkflowService service = context.getVariableValue( VARIABLE_SERVICE );
WorkflowServiceAdapter serviceAdapter = new WorkflowServiceAdapter( service );
return ( VariableDeclaration<Object>[] )serviceAdapter.getVariableDeclarations();
}
}