Java tutorial
package ca.uhn.fhir.model.primitive; import java.io.IOException; import java.io.ObjectInput; import java.io.ObjectOutput; /* * #%L * HAPI FHIR - Core Library * %% * Copyright (C) 2014 - 2016 University Health Network * %% * 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. * #L% */ import org.apache.commons.lang3.Validate; import ca.uhn.fhir.model.api.IValueSetEnumBinder; import ca.uhn.fhir.model.api.annotation.DatatypeDef; @DatatypeDef(name = "code", isSpecialization = true) public class BoundCodeDt<T extends Enum<?>> extends CodeDt { private IValueSetEnumBinder<T> myBinder; /** * @deprecated This constructor is provided only for serialization support. Do not call it directly! */ @Deprecated public BoundCodeDt() { // nothing } public BoundCodeDt(IValueSetEnumBinder<T> theBinder) { Validate.notNull(theBinder, "theBinder must not be null"); myBinder = theBinder; } public BoundCodeDt(IValueSetEnumBinder<T> theBinder, T theValue) { Validate.notNull(theBinder, "theBinder must not be null"); myBinder = theBinder; setValueAsEnum(theValue); } public IValueSetEnumBinder<T> getBinder() { return myBinder; } public T getValueAsEnum() { Validate.notNull(myBinder, "This object does not have a binder. Constructor BoundCodeDt() should not be called!"); T retVal = myBinder.fromCodeString(getValue()); if (retVal == null) { // TODO: throw special exception type? } return retVal; } @SuppressWarnings("unchecked") @Override public void readExternal(ObjectInput theIn) throws IOException, ClassNotFoundException { super.readExternal(theIn); myBinder = (IValueSetEnumBinder<T>) theIn.readObject(); } public void setValueAsEnum(T theValue) { Validate.notNull(myBinder, "This object does not have a binder. Constructor BoundCodeDt() should not be called!"); if (theValue == null) { setValue(null); } else { setValue(myBinder.toCodeString(theValue)); } } @Override public void writeExternal(ObjectOutput theOut) throws IOException { super.writeExternal(theOut); theOut.writeObject(myBinder); } }