/*
* Copyright 2004-2012 the original author or authors.
*
* 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.springframework.webflow.engine.builder.model;
import org.springframework.binding.expression.EvaluationException;
import org.springframework.binding.expression.Expression;
import org.springframework.webflow.definition.registry.FlowDefinitionLocator;
class SubflowExpression implements Expression {
private Expression subflowId;
private FlowDefinitionLocator flowDefinitionLocator;
public SubflowExpression(Expression subflowId, FlowDefinitionLocator flowDefinitionLocator) {
this.subflowId = subflowId;
this.flowDefinitionLocator = flowDefinitionLocator;
}
public Object getValue(Object context) throws EvaluationException {
String subflowId = (String) this.subflowId.getValue(context);
return flowDefinitionLocator.getFlowDefinition(subflowId);
}
public void setValue(Object context, Object value) throws EvaluationException {
throw new UnsupportedOperationException("Cannot set a subflow expression");
}
public Class<?> getValueType(Object context) {
return null;
}
public String getExpressionString() {
return null;
}
}