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Jetty example source code file (JSONEnumConvertor.java)
The Jetty JSONEnumConvertor.java source codepackage org.mortbay.util.ajax; import java.lang.reflect.Method; import java.util.Map; import org.mortbay.log.Log; import org.mortbay.util.Loader; import org.mortbay.util.ajax.JSON.Output; /* ------------------------------------------------------------ */ /** * Convert an {@link Enum} to JSON. * If fromJSON is true in the constructor, the JSON generated will * be of the form {class="com.acme.TrafficLight",value="Green"} * If fromJSON is false, then only the string value of the enum is generated. * @author gregw * */ public class JSONEnumConvertor implements JSON.Convertor { private boolean _fromJSON; private Method _valueOf; { try { Class e = Loader.loadClass(getClass(),"java.lang.Enum"); _valueOf=e.getMethod("valueOf",new Class[]{Class.class,String.class}); } catch(Exception e) { throw new RuntimeException("!Enums",e); } } public JSONEnumConvertor() { this(false); } public JSONEnumConvertor(boolean fromJSON) { _fromJSON=fromJSON; } public Object fromJSON(Map map) { if (!_fromJSON) throw new UnsupportedOperationException(); try { Class c=Loader.loadClass(getClass(),(String)map.get("class")); return _valueOf.invoke(null,new Object[]{c,map.get("value")}); } catch(Exception e) { Log.warn(e); } return null; } public void toJSON(Object obj, Output out) { if (_fromJSON) { out.addClass(obj.getClass()); out.add("value",obj.toString()); } else { out.add(obj.toString()); } } } Other Jetty examples (source code examples)Here is a short list of links related to this Jetty JSONEnumConvertor.java source code file: |
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