jtulach@351: package org.apidesign.stateful.api;
jtulach@351: 
jtulach@351: /** API for notifying progress that cannot call
jtulach@351:  * {@link #start(int)} and {@link InProgress#progress(int)} in wrong
jtulach@351:  * order. In contract to {@link ProgressStateful} class which allows that.
jtulach@351:  *
jtulach@351:  * @author Jaroslav Tulach <jtulach@netbeans.org>
jtulach@351:  */
jtulach@351: public abstract class ProgressStateless {
jtulach@351: // BEGIN: progress.phases
jtulach@351:     public static ProgressStateless create(String name) {
jtulach@351:         return createImpl(name);
jtulach@351:     }
jtulach@351:     public abstract InProgress start(int totalAmount);
jtulach@351: 
jtulach@351:     public abstract class InProgress {
jtulach@351:         public abstract void progress(int howMuch);
jtulach@351:         public abstract void finish();
jtulach@351:         // FINISH: progress.phases
jtulach@351: 
jtulach@351:         InProgress() {
jtulach@351:         }
jtulach@351:     }
jtulach@351: 
jtulach@351: 
jtulach@351:     ProgressStateless() {
jtulach@351:     }
jtulach@351:     
jtulach@351:     private static ProgressStateless createImpl(String name) {
jtulach@351:         return new Impl(name);
jtulach@351:     }
jtulach@351: 
jtulach@351:     private static final class Impl extends ProgressStateless {
jtulach@351:         private final String name;
jtulach@351: 
jtulach@351:         public Impl(String name) {
jtulach@351:             this.name = name;
jtulach@351:         }
jtulach@351: 
jtulach@351:         @Override
jtulach@351:         public InProgress start(int totalAmount) {
jtulach@351:             return new InImpl(totalAmount);
jtulach@351:         }
jtulach@351: 
jtulach@351:         private class InImpl extends InProgress {
jtulach@351:             private final int total;
jtulach@351:             private int current;
jtulach@351: 
jtulach@351:             public InImpl(int total) {
jtulach@351:                 this.total = total;
jtulach@351:             }
jtulach@351: 
jtulach@351:             @Override
jtulach@351:             public void progress(int howMuch) {
jtulach@351:                 current = howMuch;
jtulach@351:             }
jtulach@351: 
jtulach@351:             @Override
jtulach@351:             public void finish() {
jtulach@351:                 current = total;
jtulach@351:             }
jtulach@351:         }
jtulach@351:     }
jtulach@351: }