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1
56 package org.objectstyle.cayenne.pref;
57
58 import java.util.Collections  ;
59
60 import org.objectstyle.cayenne.access.DataContext;
61
62
67 public abstract class CayennePreferenceEditor implements PreferenceEditor {
68
69 protected CayennePreferenceService service;
70 protected DataContext editingContext;
71 protected boolean restartRequired;
72 protected int saveInterval;
73
74 public CayennePreferenceEditor(CayennePreferenceService service) {
75 this.service = service;
76 this.editingContext = service
77 .getDataContext()
78 .getParentDataDomain()
79 .createDataContext();
80 this.saveInterval = service.getSaveInterval();
81 }
82
83 protected boolean isRestartRequired() {
84 return restartRequired;
85 }
86
87 protected void setRestartRequired(boolean restartOnSave) {
88 this.restartRequired = restartOnSave;
89 }
90
91 protected DataContext getEditingContext() {
92 return editingContext;
93 }
94
95 public Domain editableInstance(Domain object) {
96 if (object.getDataContext() == getEditingContext()) {
97 return object;
98 }
99
100 return (Domain) getEditingContext().localObjects(
101 Collections.singletonList(object)).get(0);
102 }
103
104 public PreferenceDetail createDetail(Domain domain, String key) {
105 domain = editableInstance(domain);
106 DomainPreference preference = (DomainPreference) getEditingContext()
107 .createAndRegisterNewObject(DomainPreference.class);
108 preference.setDomain(domain);
109 preference.setKey(key);
110
111 return preference.getPreference();
112 }
113
114 public PreferenceDetail createDetail(Domain domain, String key, Class javaClass) {
115 domain = editableInstance(domain);
116 DomainPreference preferenceLink = (DomainPreference) getEditingContext()
117 .createAndRegisterNewObject(DomainPreference.class);
118 preferenceLink.setDomain(domain);
119 preferenceLink.setKey(key);
120
121 PreferenceDetail detail = (PreferenceDetail) getEditingContext()
122 .createAndRegisterNewObject(javaClass);
123
124 detail.setDomainPreference(preferenceLink);
125 return detail;
126 }
127
128 public PreferenceDetail deleteDetail(Domain domain, String key) {
129 domain = editableInstance(domain);
130 PreferenceDetail detail = domain.getDetail(key, false);
131
132 if (detail != null) {
133 DomainPreference preference = detail.getDomainPreference();
134 preference.setDomain(null);
135 getEditingContext().deleteObject(preference);
136 getEditingContext().deleteObject(detail);
137 }
138
139 return detail;
140 }
141
142 public int getSaveInterval() {
143 return saveInterval;
144 }
145
146 public void setSaveInterval(int ms) {
147 if (saveInterval != ms) {
148 saveInterval = ms;
149 restartRequired = true;
150 }
151 }
152
153 public PreferenceService getService() {
154 return service;
155 }
156
157 public void save() {
158 service.setSaveInterval(saveInterval);
159 editingContext.commitChanges();
160
161 if (restartRequired) {
162 restart();
163 }
164 }
165
166 public void revert() {
167 editingContext.rollbackChanges();
168 restartRequired = false;
169 }
170
171 protected abstract void restart();
172 } |
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