1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/samples/stateful/src/org/apidesign/stateful/api/ProgressStateful.java	Sun May 02 14:35:48 2010 +0200
     1.3 @@ -0,0 +1,53 @@
     1.4 +package org.apidesign.stateful.api;
     1.5 +
     1.6 +/** API for notifying progress.
     1.7 + *
     1.8 + * @author Jaroslav Tulach <jtulach@netbeans.org>
     1.9 + */
    1.10 +// BEGIN: progress.api
    1.11 +public abstract class ProgressStateful {
    1.12 +    public static ProgressStateful create(String name) {
    1.13 +        return createImpl(name);
    1.14 +    }
    1.15 +    public abstract void start(int totalAmount);
    1.16 +    public abstract void progress(int howMuch);
    1.17 +    public abstract void finish();
    1.18 +    // FINISH: progress.api
    1.19 +
    1.20 +    ProgressStateful() {
    1.21 +    }
    1.22 +    
    1.23 +    private static ProgressStateful createImpl(String name) {
    1.24 +        return new Impl(name);
    1.25 +    }
    1.26 +
    1.27 +    private static final class Impl extends ProgressStateful {
    1.28 +        private final String name;
    1.29 +        private int total = -1;
    1.30 +        private int current;
    1.31 +
    1.32 +        public Impl(String name) {
    1.33 +            this.name = name;
    1.34 +        }
    1.35 +
    1.36 +        @Override
    1.37 +        public void start(int totalAmount) {
    1.38 +            total = totalAmount;
    1.39 +        }
    1.40 +
    1.41 +        @Override
    1.42 +        public void progress(int howMuch) {
    1.43 +            if (total == -1) {
    1.44 +                throw new IllegalStateException("Call start first!");
    1.45 +            }
    1.46 +            current = howMuch;
    1.47 +        }
    1.48 +
    1.49 +        @Override
    1.50 +        public void finish() {
    1.51 +            total = -1;
    1.52 +            current = 0;
    1.53 +        }
    1.54 +
    1.55 +    }
    1.56 +}