skrueger/swing/DialogManager.java

package skrueger.swing;

import java.awt.Component;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;

import javax.swing.JDialog;

import org.apache.log4j.Logger;

public abstract class DialogManager<KEY, DIALOG extends JDialog> {
        final static private Logger LOGGER = Logger.getLogger(DialogManager.class);

        public abstract class FactoryInterface {

                public abstract DIALOG create();
                
                /** May be overridden to add Listeners **/
                public void afterCreation(DIALOG newInstance){};

                /** May be overridden to remove Listeners added earlier **/
                public void beforeDispose(DIALOG newInstance){};

        }

        protected HashMap<KEY, DIALOG> dialogCache = new HashMap<KEY, DIALOG>();

        /**
         * A {@link DialogManager} instance can be created for any extension of
         * {@link JDialog} that will implement the
         * {@link #getInstanceFor(Object, Component, Object...)} method.
         */
        public DialogManager() {
        }

        /**
         * This will be done with every dialog that an instance is required for.
         * 
         * @param dialog
         * @return
         */
        protected DIALOG bringup(DIALOG dialog) {
                if (!dialog.isVisible())
                        dialog.setVisible(true);
                dialog.toFront();

                return dialog;
        }

        public abstract DIALOG getInstanceFor(final KEY key, final Component owner,
                        final Object... constArgs);

        /**
         * @return Is there an open/visible dialog for the given layer id?
         */
        public boolean isVisibleFor(KEY key) {
                return dialogCache.containsKey(key) && dialogCache.get(key).isVisible();
        }

        /**
         * Will dispose any dialog that is registered to the given parent
         * {@link Component}
         * 
         * @param parent
         */
        public void disposeInstanceForParent(final Component parent) {

                final HashMap<KEY, JDialog> clonedHashMap = (HashMap<KEY, JDialog>) dialogCache
                                .clone();

                for (KEY chartId : clonedHashMap.keySet()) {
                        if (dialogCache.get(chartId).getParent() == parent) {
                                disposeInstanceFor(chartId);
                        }
                }
        }

        public boolean disposeInstanceFor(KEY chartId) {
                synchronized (dialogCache) {

                        final DIALOG dialog = dialogCache.get(chartId);
                        if (dialog != null) {
                                dialog.dispose();
                                dialogCache.remove(chartId);
                                return true;
                        }
                        return false;
                }
        }

        /**
         * Checks whether there already is an instance for that key and otherwise
         * will create the instance by invoking the {@link FactoryInterface} #create
         * method.
         * 
         * @param factory
         *            {@link FactoryInterface} that creates the DIALOG
         * 
         * @return Always a visible and inFront instance of DIALOG for the given
         *         key.
         */
        public DIALOG getInstanceFor(final KEY key, final FactoryInterface factory) {
                final DIALOG dialog;
                if (isVisibleFor(key)) {
                        dialog = dialogCache.get(key);
                } else {

                        dialog = factory.create();
                        dialogCache.put(key, dialog);
                        dialog.setVisible(true);
                        dialog.toFront();

                        dialog.addWindowListener(new WindowAdapter() {
                                @Override
                                public void windowClosed(final WindowEvent e) {
                                        factory.beforeDispose(dialog);
                                        disposeInstanceFor(key);
                                }
                        });
                        
                        factory.afterCreation(dialog);
                }
                

                return dialog;
        }

        /**
         * Disposes all open instances and removes them from the cache.
         * 
         * @return <code>true</code> if at least one window has been disposed.
         */
        public boolean disposeAll() {

                boolean atLeastOne = false;
                HashSet<KEY> tempKeys = new HashSet<KEY>(dialogCache.keySet());
                for (KEY key : tempKeys) {
                        DIALOG dialog = dialogCache.get(key);
                        if (dialog != null) {
                                dialog.dispose();
                                atLeastOne = true;
                        }
                }
                tempKeys.clear();
                dialogCache.clear();
                return atLeastOne;
        }

        /**
         * @return All instances of DIALOG as they are cached.
         */
        public Collection<DIALOG> getAllInstances() {
                return dialogCache.values();
        }


}
1	package skrueger.swing;
2
3	import java.awt.Component;
4	import java.awt.event.WindowAdapter;
5	import java.awt.event.WindowEvent;
6	import java.util.Collection;
7	import java.util.HashMap;
8	import java.util.HashSet;
9
10	import javax.swing.JDialog;
11
12	import org.apache.log4j.Logger;
13
14	public abstract class DialogManager<KEY, DIALOG extends JDialog> {
15	final static private Logger LOGGER = Logger.getLogger(DialogManager.class);
16
17	public abstract class FactoryInterface {
18
19	public abstract DIALOG create();
20
21	/ May be overridden to add Listeners /
22	public void afterCreation(DIALOG newInstance){};
23
24	/ May be overridden to remove Listeners added earlier /
25	public void beforeDispose(DIALOG newInstance){};
26
27	}
28
29	protected HashMap<KEY, DIALOG> dialogCache = new HashMap<KEY, DIALOG>();
30
31	/**
32	* A {@link DialogManager} instance can be created for any extension of
33	* {@link JDialog} that will implement the
34	* {@link #getInstanceFor(Object, Component, Object...)} method.
35	*/
36	public DialogManager() {
37	}
38
39	/**
40	* This will be done with every dialog that an instance is required for.
41	*
42	* @param dialog
43	* @return
44	*/
45	protected DIALOG bringup(DIALOG dialog) {
46	if (!dialog.isVisible())
47	dialog.setVisible(true);
48	dialog.toFront();
49
50	return dialog;
51	}
52
53	public abstract DIALOG getInstanceFor(final KEY key, final Component owner,
54	final Object... constArgs);
55
56	/**
57	* @return Is there an open/visible dialog for the given layer id?
58	*/
59	public boolean isVisibleFor(KEY key) {
60	return dialogCache.containsKey(key) && dialogCache.get(key).isVisible();
61	}
62
63	/**
64	* Will dispose any dialog that is registered to the given parent
65	* {@link Component}
66	*
67	* @param parent
68	*/
69	public void disposeInstanceForParent(final Component parent) {
70
71	final HashMap<KEY, JDialog> clonedHashMap = (HashMap<KEY, JDialog>) dialogCache
72	.clone();
73
74	for (KEY chartId : clonedHashMap.keySet()) {
75	if (dialogCache.get(chartId).getParent() == parent) {
76	disposeInstanceFor(chartId);
77	}
78	}
79	}
80
81	public boolean disposeInstanceFor(KEY chartId) {
82	synchronized (dialogCache) {
83
84	final DIALOG dialog = dialogCache.get(chartId);
85	if (dialog != null) {
86	dialog.dispose();
87	dialogCache.remove(chartId);
88	return true;
89	}
90	return false;
91	}
92	}
93
94	/**
95	* Checks whether there already is an instance for that key and otherwise
96	* will create the instance by invoking the {@link FactoryInterface} #create
97	* method.
98	*
99	* @param factory
100	* {@link FactoryInterface} that creates the DIALOG
101	*
102	* @return Always a visible and inFront instance of DIALOG for the given
103	* key.
104	*/
105	public DIALOG getInstanceFor(final KEY key, final FactoryInterface factory) {
106	final DIALOG dialog;
107	if (isVisibleFor(key)) {
108	dialog = dialogCache.get(key);
109	} else {
110
111	dialog = factory.create();
112	dialogCache.put(key, dialog);
113	dialog.setVisible(true);
114	dialog.toFront();
115
116	dialog.addWindowListener(new WindowAdapter() {
117	@Override
118	public void windowClosed(final WindowEvent e) {
119	factory.beforeDispose(dialog);
120	disposeInstanceFor(key);
121	}
122	});
123
124	factory.afterCreation(dialog);
125	}
126
127
128	return dialog;
129	}
130
131	/**
132	* Disposes all open instances and removes them from the cache.
133	*
134	* @return <code>true</code> if at least one window has been disposed.
135	*/
136	public boolean disposeAll() {
137
138	boolean atLeastOne = false;
139	HashSet<KEY> tempKeys = new HashSet<KEY>(dialogCache.keySet());
140	for (KEY key : tempKeys) {
141	DIALOG dialog = dialogCache.get(key);
142	if (dialog != null) {
143	dialog.dispose();
144	atLeastOne = true;
145	}
146	}
147	tempKeys.clear();
148	dialogCache.clear();
149	return atLeastOne;
150	}
151
152	/**
153	* @return All instances of DIALOG as they are cached.
154	*/
155	public Collection<DIALOG> getAllInstances() {
156	return dialogCache.values();
157	}
158
159
160	}
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