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 AtlasDialog> {
        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;
        }

        /**
         * @param key
         * @param owner
         * @param constArgs
         * @return a cached instance or creates a new instance. Instances are always retuned visible and toFront.
         */
        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 key) {
                synchronized (dialogCache) {

                        final DIALOG dialog = dialogCache.get(key);
                        if (dialog != null) {
                                dialog.dispose();
                                dialogCache.remove(key);
                                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) {
                                        dialog.setVisible(false);
                                        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	alfonx	420	package skrueger.swing;
2
3			import java.awt.Component;
4			import java.awt.event.WindowAdapter;
5			import java.awt.event.WindowEvent;
6	alfonx	422	import java.util.Collection;
7	alfonx	420	import java.util.HashMap;
8			import java.util.HashSet;
9
10			import javax.swing.JDialog;
11
12			import org.apache.log4j.Logger;
13
14	alfonx	461	public abstract class DialogManager<KEY, DIALOG extends AtlasDialog> {
15	alfonx	421	final static private Logger LOGGER = Logger.getLogger(DialogManager.class);
16	alfonx	420
17			public abstract class FactoryInterface {
18
19			public abstract DIALOG create();
20	alfonx	433
21			/ May be overridden to add Listeners /
22	alfonx	459	public void afterCreation(DIALOG newInstance){};
23	alfonx	420
24	alfonx	435	/ May be overridden to remove Listeners added earlier /
25	alfonx	459	public void beforeDispose(DIALOG newInstance){};
26	alfonx	435
27	alfonx	420	}
28
29	alfonx	422	protected HashMap<KEY, DIALOG> dialogCache = new HashMap<KEY, DIALOG>();
30	alfonx	420
31	alfonx	421	/**
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	alfonx	420	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	alfonx	474	/**
54			* @param key
55			* @param owner
56			* @param constArgs
57			* @return a cached instance or creates a new instance. Instances are always retuned visible and toFront.
58			*/
59	alfonx	420	public abstract DIALOG getInstanceFor(final KEY key, final Component owner,
60			final Object... constArgs);
61
62			/**
63			* @return Is there an open/visible dialog for the given layer id?
64			*/
65			public boolean isVisibleFor(KEY key) {
66			return dialogCache.containsKey(key) && dialogCache.get(key).isVisible();
67			}
68
69			/**
70			* Will dispose any dialog that is registered to the given parent
71			* {@link Component}
72			*
73			* @param parent
74			*/
75			public void disposeInstanceForParent(final Component parent) {
76
77			final HashMap<KEY, JDialog> clonedHashMap = (HashMap<KEY, JDialog>) dialogCache
78			.clone();
79
80			for (KEY chartId : clonedHashMap.keySet()) {
81			if (dialogCache.get(chartId).getParent() == parent) {
82			disposeInstanceFor(chartId);
83			}
84			}
85			}
86
87	alfonx	470	public boolean disposeInstanceFor(KEY key) {
88	alfonx	420	synchronized (dialogCache) {
89
90	alfonx	470	final DIALOG dialog = dialogCache.get(key);
91	alfonx	420	if (dialog != null) {
92			dialog.dispose();
93	alfonx	470	dialogCache.remove(key);
94	alfonx	420	return true;
95			}
96			return false;
97			}
98			}
99
100			/**
101			* Checks whether there already is an instance for that key and otherwise
102			* will create the instance by invoking the {@link FactoryInterface} #create
103			* method.
104			*
105			* @param factory
106			* {@link FactoryInterface} that creates the DIALOG
107			*
108	alfonx	421	* @return Always a visible and inFront instance of DIALOG for the given
109			* key.
110	alfonx	420	*/
111	alfonx	435	public DIALOG getInstanceFor(final KEY key, final FactoryInterface factory) {
112			final DIALOG dialog;
113	alfonx	420	if (isVisibleFor(key)) {
114			dialog = dialogCache.get(key);
115			} else {
116
117			dialog = factory.create();
118			dialogCache.put(key, dialog);
119	alfonx	459	dialog.setVisible(true);
120			dialog.toFront();
121	alfonx	420
122			dialog.addWindowListener(new WindowAdapter() {
123			@Override
124			public void windowClosed(final WindowEvent e) {
125	alfonx	461	dialog.setVisible(false);
126	alfonx	459	factory.beforeDispose(dialog);
127	alfonx	420	disposeInstanceFor(key);
128			}
129			});
130	alfonx	433
131	alfonx	459	factory.afterCreation(dialog);
132	alfonx	420	}
133	alfonx	435
134	alfonx	459
135	alfonx	420	return dialog;
136			}
137
138			/**
139	alfonx	421	* Disposes all open instances and removes them from the cache.
140	alfonx	420	*
141			* @return <code>true</code> if at least one window has been disposed.
142			*/
143			public boolean disposeAll() {
144	alfonx	421
145	alfonx	420	boolean atLeastOne = false;
146			HashSet<KEY> tempKeys = new HashSet<KEY>(dialogCache.keySet());
147			for (KEY key : tempKeys) {
148	alfonx	421	DIALOG dialog = dialogCache.get(key);
149	alfonx	420	if (dialog != null) {
150			dialog.dispose();
151			atLeastOne = true;
152			}
153			}
154			tempKeys.clear();
155			dialogCache.clear();
156			return atLeastOne;
157			}
158	alfonx	421
159	alfonx	422	/**
160			* @return All instances of DIALOG as they are cached.
161			*/
162			public Collection<DIALOG> getAllInstances() {
163			return dialogCache.values();
164			}
165
166
167	alfonx	420	}
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