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Added property change notification support. This is going to kick ass.

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git-svn-id: https://samskivert.googlecode.com/svn/trunk@991 6335cc39-0255-0410-8fd6-9bcaacd3b74c
This commit is contained in:
samskivert@gmail.com
2002-12-13 22:12:28 +00:00
parent a23bfcc343
commit 52766f48a4
1 changed files with 118 additions and 17 deletions
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projects/samskivert/src/java/com/samskivert/util/Config.java
+118 -17
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@@ -1,5 +1,5 @@
//
// $Id: Config.java,v 1.18 2002/11/26 01:57:22 mdb Exp $
// $Id: Config.java,v 1.19 2002/12/13 22:12:28 mdb Exp $
//
// samskivert library - useful routines for java programs
// Copyright (C) 2001 Michael Bayne
@@ -20,6 +20,9 @@
package com.samskivert.util;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.io.IOException;
import java.util.Enumeration;
@@ -139,7 +142,14 @@ public class Config
*/
public int getValue (String name, int defval)
{
// if there is a value, parse it into an integer
return _prefs.getInt(name, getDefValue(name, defval));
}
/**
* Returns the value specified in the properties override file.
*/
protected int getDefValue (String name, int defval)
{
String val = _props.getProperty(name);
if (val != null) {
try {
@@ -149,9 +159,7 @@ public class Config
", value=" + val + "].");
}
}
// finally look for an overridden value
return _prefs.getInt(name, defval);
return defval;
}
/**
@@ -160,7 +168,14 @@ public class Config
*/
public void setValue (String name, int value)
{
Integer oldValue = null;
if (_prefs.get(name, null) != null ||
_props.getProperty(name) != null) {
oldValue = new Integer(_prefs.getInt(name, getDefValue(name, 0)));
}
_prefs.putInt(name, value);
_propsup.firePropertyChange(name, oldValue, new Integer(value));
}
/**
@@ -179,7 +194,14 @@ public class Config
*/
public long getValue (String name, long defval)
{
// if there is a value, parse it into an integer
return _prefs.getLong(name, getDefValue(name, defval));
}
/**
* Returns the value specified in the properties override file.
*/
protected long getDefValue (String name, long defval)
{
String val = _props.getProperty(name);
if (val != null) {
try {
@@ -189,9 +211,7 @@ public class Config
", value=" + val + "].");
}
}
// finally look for an overridden value
return _prefs.getLong(name, defval);
return defval;
}
/**
@@ -200,7 +220,14 @@ public class Config
*/
public void setValue (String name, long value)
{
Long oldValue = null;
if (_prefs.get(name, null) != null ||
_props.getProperty(name) != null) {
oldValue = new Long(_prefs.getLong(name, getDefValue(name, 0L)));
}
_prefs.putLong(name, value);
_propsup.firePropertyChange(name, oldValue, new Long(value));
}
/**
@@ -219,7 +246,14 @@ public class Config
*/
public float getValue (String name, float defval)
{
// if there is a value, parse it into an integer
return _prefs.getFloat(name, getDefValue(name, defval));
}
/**
* Returns the value specified in the properties override file.
*/
protected float getDefValue (String name, float defval)
{
String val = _props.getProperty(name);
if (val != null) {
try {
@@ -229,9 +263,7 @@ public class Config
", value=" + val + "].");
}
}
// finally look for an overridden value
return _prefs.getFloat(name, defval);
return defval;
}
/**
@@ -240,7 +272,14 @@ public class Config
*/
public void setValue (String name, float value)
{
Float oldValue = null;
if (_prefs.get(name, null) != null ||
_props.getProperty(name) != null) {
oldValue = new Float(_prefs.getFloat(name, getDefValue(name, 0f)));
}
_prefs.putFloat(name, value);
_propsup.firePropertyChange(name, oldValue, new Float(value));
}
/**
@@ -272,7 +311,9 @@ public class Config
*/
public void setValue (String name, String value)
{
String oldValue = getValue(name, (String)null);
_prefs.put(name, value);
_propsup.firePropertyChange(name, oldValue, value);
}
/**
@@ -291,14 +332,19 @@ public class Config
*/
public boolean getValue (String name, boolean defval)
{
// if there is a value, parse it into an integer
return _prefs.getBoolean(name, getDefValue(name, defval));
}
/**
* Returns the value specified in the properties override file.
*/
protected boolean getDefValue (String name, boolean defval)
{
String val = _props.getProperty(name);
if (val != null) {
defval = !val.equalsIgnoreCase("false");
}
// finally look for an overridden value
return _prefs.getBoolean(name, defval);
return defval;
}
/**
@@ -307,7 +353,15 @@ public class Config
*/
public void setValue (String name, boolean value)
{
Boolean oldValue = null;
if (_prefs.get(name, null) != null ||
_props.getProperty(name) != null) {
oldValue = new Boolean(
_prefs.getBoolean(name, getDefValue(name, false)));
}
_prefs.putBoolean(name, value);
_propsup.firePropertyChange(name, oldValue, new Boolean(value));
}
/**
@@ -350,7 +404,9 @@ public class Config
*/
public void setValue (String name, int[] value)
{
int[] oldValue = getValue(name, (int[])null);
_prefs.put(name, StringUtil.toString(value, "", ""));
_propsup.firePropertyChange(name, oldValue, value);
}
/**
@@ -393,7 +449,49 @@ public class Config
*/
public void setValue (String name, String[] value)
{
String[] oldValue = getValue(name, (String[])null);
_prefs.put(name, StringUtil.joinEscaped(value));
_propsup.firePropertyChange(name, oldValue, value);
}
/**
* Adds a listener that will be notified whenever any configuration
* properties are changed by a call to one of the <code>set</code>
* methods.
*/
public void addPropertyChangeListener (PropertyChangeListener listener)
{
_propsup.addPropertyChangeListener(listener);
}
/**
* Removes a property change listener previously added via a call to
* {@link #addPropertyChangeListener}.
*/
public void removePropertyChangeListener (PropertyChangeListener listener)
{
_propsup.removePropertyChangeListener(listener);
}
/**
* Adds a listener that will be notified whenever the specified
* configuration property is changed by a call to the appropriate
* <code>set</code> method.
*/
public void addPropertyChangeListener (
String name, PropertyChangeListener listener)
{
_propsup.addPropertyChangeListener(name, listener);
}
/**
* Removes a property change listener previously added via a call to
* {@link #addPropertyChangeListener(String,PropertyChangeListener)}.
*/
public void removePropertyChangeListener (
String name, PropertyChangeListener listener)
{
_propsup.removePropertyChangeListener(name, listener);
}
/**
@@ -491,6 +589,9 @@ public class Config
/** Used to maintain configuration overrides. */
protected Preferences _prefs;
/** Used to support our property change mechanism. */
protected PropertyChangeSupport _propsup = new PropertyChangeSupport(this);
/** The file extension used for configuration files. */
protected static final String PROPS_SUFFIX = ".properties";
}