| /******************************************************************************* |
| * Copyright (c) 2013 Boeing. |
| * 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: |
| * Boeing - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ote.bytemessage; |
| |
| import java.lang.reflect.Array; |
| |
| import org.eclipse.osee.ote.message.elements.IEnumValue; |
| |
| /** |
| * This is a utility class for all use with Enums that implement IEnumValue which are used by EnumeratedElement. |
| * It requires the last enum to be the __undefined enum. |
| * |
| * @author Andrew M. Finkbeiner |
| * |
| * @param <T> |
| */ |
| public class EnumBase<T extends IEnumValue<T>> { |
| |
| private int maxValue = 0; |
| |
| private T[] values; |
| private final T[] lookup; |
| private final T undefined; |
| |
| private EnumSetter undefinedSetter; |
| |
| @SuppressWarnings({"unchecked", "rawtypes" }) |
| public EnumBase(T[] enumvalues, Class<T> clazz, T undefined, EnumSetter undefinedSetter) { |
| T lastElement = enumvalues[enumvalues.length-1]; |
| if(lastElement instanceof Enum){ |
| if(!((Enum)lastElement).name().equalsIgnoreCase("__undefined")){ |
| throw new IllegalStateException("Last enum item must be named [ __undefined | __UNDEFINED]"); |
| } |
| } else { |
| throw new IllegalStateException("EnumBase requires array of type Enum"); |
| } |
| this.values = (T[])Array.newInstance(clazz, enumvalues.length - 1);; |
| this.undefinedSetter = undefinedSetter; |
| this.undefined = undefined; |
| for(int i = 0; i < enumvalues.length - 1; i++){ |
| if(enumvalues[i].getIntValue() > maxValue){ |
| maxValue = enumvalues[i].getIntValue(); |
| } |
| values[i] = enumvalues[i]; |
| } |
| lookup = (T[])Array.newInstance(clazz, maxValue + 1); |
| for(int i = 0; i < values.length; i++){ |
| lookup[values[i].getIntValue()] = values[i]; |
| } |
| } |
| |
| public T toEnum(int value){ |
| if(lookup == null){ |
| for(T myEnum: getValues()){ |
| if(myEnum.getIntValue() == value){ |
| return myEnum; |
| } |
| } |
| undefinedSetter.setValue(value); |
| return undefined; |
| } else if(value < 0 || value >= lookup.length ){ |
| undefinedSetter.setValue(value); |
| return undefined; |
| } else { |
| T enumeration = lookup[value]; |
| if(enumeration == null){ |
| undefinedSetter.setValue(value); |
| return undefined; |
| } else { |
| return enumeration; |
| } |
| } |
| } |
| |
| public T[] getValues(){ |
| return values; |
| } |
| } |