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comparison src/org/tmatesoft/hg/util/ProgressSupport.java @ 356:91d75e1bac9f

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Consistent approach to deal with adaptable objects. Give adaptable precedence over instanceof to allow conditional response when classes do implement desired interface
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 06 Dec 2011 14:25:52 +0100
parents 41a778e3fd31
children 48f993aa2f41
comparison
equal deleted inserted replaced
355:f2c11fe7f3e9 356:91d75e1bac9f
35 /** 35 /**
36 * @param target object that might be capable to report progress. Can be <code>null</code> 36 * @param target object that might be capable to report progress. Can be <code>null</code>
37 * @return support object extracted from target or an empty, no-op implementation 37 * @return support object extracted from target or an empty, no-op implementation
38 */ 38 */
39 public static ProgressSupport get(Object target) { 39 public static ProgressSupport get(Object target) {
40 if (target instanceof ProgressSupport) { 40 ProgressSupport ps = Adaptable.Factory.getAdapter(target, ProgressSupport.class, null);
41 return (ProgressSupport) target; 41 if (ps != null) {
42 } 42 return ps;
43 if (target instanceof Adaptable) {
44 ProgressSupport ps = ((Adaptable) target).getAdapter(ProgressSupport.class);
45 if (ps != null) {
46 return ps;
47 }
48 } 43 }
49 return new ProgressSupport() { 44 return new ProgressSupport() {
50 public void start(int totalUnits) { 45 public void start(int totalUnits) {
51 } 46 }
52 public void worked(int units) { 47 public void worked(int units) {