/* 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.activiti.explorer.ui.variable;
import java.util.HashMap;
import java.util.Map;
/**
* Manager responsible for rendering variable values.
*
* @author Frederik Heremans
*/
public class VariableRendererManager {
private Map<Class<?>, VariableRenderer> renderers = new HashMap<Class<?>, VariableRenderer>();
/**
* Add variable renderer. If a renderer for the same type is already registered,
* it will be replaced with this one.
*/
public void addVariableRenderer(VariableRenderer renderer) {
renderers.put(renderer.getVariableType(), renderer);
}
/**
* Get the renderer for the given type. Returns null, when no renderer is found.
*/
public VariableRenderer getVariableRenderer(Class<?> variableType) {
return renderers.get(variableType);
}
/**
* Get the string-representation to use. When no renderer is found for the
* type of variable, toString() is called.
*/
public String getStringRepresentation(Object variableValue) {
if(variableValue != null) {
final VariableRenderer renderer = getVariableRenderer(variableValue.getClass());
if(renderer != null) {
return renderer.getStringRepresentation(variableValue);
} else {
return variableValue.toString();
}
}
return null;
}
}