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Package: ECPObserverCall$Result
ECPObserverCall$Result
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| ECPObserverCall.Result(ECPObserver, Method, Object) |
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| ECPObserverCall.Result(ECPObserver, Throwable, Method) |
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| exceptionOccurred() |
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| getDefaultValue(Method) |
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| getException() |
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| getObserver() |
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| getResult() |
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| getResultOrDefaultValue() |
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| static {...} |
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2012 EclipseSource Muenchen GmbH and others.
3: *
4: * All rights reserved. This program and the accompanying materials
5: * are made available under the terms of the Eclipse Public License 2.0
6: * which accompanies this distribution, and is available at
7: * https://www.eclipse.org/legal/epl-2.0/
8: *
9: * SPDX-License-Identifier: EPL-2.0
10: *
11: * Contributors:
12: * wesendon - initial API and implementation
13: *
14: *******************************************************************************/
15:
16: package org.eclipse.emf.ecp.internal.core.util.observer;
17:
18: import java.lang.reflect.Method;
19: import java.util.HashMap;
20: import java.util.List;
21: import java.util.Map;
22:
23: import org.eclipse.emf.ecp.core.util.observer.ECPObserver;
24:
25: /**
26: * ProxyObserver, returned by the {@link ECPObserverBusImpl} when calling {@link ECPObserverBusImpl#notify(Class)},
27: * normally it
28: * has
29: * the type of the class extending IObserver in order to call the observer interface with type safety.
30: * However, the same proxies can be casted into {@link ECPObserverCall} in order to access the results by all registered
31: * observers.
32: *
33: * @author wesendon
34: *
35: */
36: public interface ECPObserverCall {
37:
38: /**
39: * Returns the results of each notified observer. This method will always return the returns from the last call
40: * executed on the proxy.
41: *
42: * @return list of results
43: */
44: List<Result> getObserverCallResults();
45:
46: /**
47: * This class represents an result from an observer call. It contains the observer, the called method and the result
48: * or an exception, if occured.
49: *
50: *
51: * @author wesendon
52: *
53: */
54: class Result {
55:
56: private final ECPObserver observer;
57: private final Method method;
58: private final Object result;
59: private final Throwable exception;
60:
61: /**
62: * This constructor is used if <b>NO</b> exception occurred.
63: *
64: * @param observer observer
65: * @param method method
66: * @param result result
67: */
68: public Result(ECPObserver observer, Method method, Object result) {
69: this.observer = observer;
70: this.method = method;
71: this.result = result;
72: exception = null;
73: }
74:
75: /**
76: * This constructor is used if an exception <b>HAS</b> occurred.
77: *
78: * @param observer observer
79: * @param e exception
80: * @param method method
81: */
82: public Result(ECPObserver observer, Throwable e, Method method) {
83: this.observer = observer;
84: exception = e;
85: this.method = method;
86: result = null;
87: }
88:
89: /**
90: * Specifies whether this Result contains an exception.
91: *
92: * @return boolean
93: */
94: public boolean exceptionOccurred() {
95:• return exception != null;
96: }
97:
98: /**
99: * .
100: *
101: * @return exception or null
102: */
103: public Throwable getException() {
104: return exception;
105: }
106:
107: /**
108: * The observer.
109: *
110: * @return this can't be null
111: */
112: public ECPObserver getObserver() {
113: return observer;
114: }
115:
116: /**
117: * The result.
118: *
119: * @return the result or null
120: */
121: public Object getResult() {
122: return result;
123: }
124:
125: /**
126: * Returns the result or the default value for primitive types.
127: *
128: * @return result, null or in case of primitive type, the default value.
129: */
130: public Object getResultOrDefaultValue() {
131: Object result = getResult();
132:• if (result == null) {
133: result = getDefaultValue(method);
134: }
135: return result;
136: }
137:
138: /**
139: * Returns the default value for a given method. Which is null or the default primitive value.
140: *
141: * @param m method
142: * @return null or default primitive value
143: */
144: public static Object getDefaultValue(Method m) {
145:• if (m.getReturnType().isPrimitive()) {
146: return DEFAULTPRIMITIVEVALUES.get(m.getReturnType().getSimpleName());
147: }
148: return null;
149: }
150:
151: private static final Map<String, Object> DEFAULTPRIMITIVEVALUES = new HashMap<String, Object>();
152:
153: static {
154: DEFAULTPRIMITIVEVALUES.put("int", new Integer(0)); //$NON-NLS-1$
155: DEFAULTPRIMITIVEVALUES.put("boolean", new Boolean(false)); //$NON-NLS-1$
156: DEFAULTPRIMITIVEVALUES.put("long", new Long(0)); //$NON-NLS-1$
157: DEFAULTPRIMITIVEVALUES.put("float", new Float(0)); //$NON-NLS-1$
158: DEFAULTPRIMITIVEVALUES.put("double", new Double(0)); //$NON-NLS-1$
159: DEFAULTPRIMITIVEVALUES.put("byte", Byte.MIN_VALUE); //$NON-NLS-1$
160: DEFAULTPRIMITIVEVALUES.put("short", Short.MIN_VALUE); //$NON-NLS-1$
161: }
162: }
163: }