org.eclipse.core.runtime.Preferences#isDefault ( )源码实例Demo

public void setValue( String name, double value )
{
	double oldValue = getDouble( name );
	if ( this.preferenceType == SPECIAL_TYPE && project != null )
	{
		Preferences preference = prefs.getReportPreference( project );
		if ( preference != null )
		{
			if ( preference.isDefault( name ) || oldValue != value )
			{
				preference.setValue( name, value );
				firePreferenceChangeEvent( name,
						new Double( oldValue ),
						new Double( value ) );
			}
			return;
		}
	}
	if ( oldValue != value )
	{
		prefsStore.setValue( name, value );
		firePreferenceChangeEvent( name,
				new Double( oldValue ),
				new Double( value ) );
	}
}
 

public void setValue( String name, float value )
{
	float oldValue = getFloat( name );
	if ( this.preferenceType == SPECIAL_TYPE && project != null )
	{
		Preferences preference = prefs.getReportPreference( project );
		if ( preference != null )
		{
			if ( preference.isDefault( name ) || oldValue != value )
			{
				preference.setValue( name, value );
				firePreferenceChangeEvent( name,
						new Float( oldValue ),
						new Float( value ) );
			}
			return;
		}
	}
	if ( oldValue != value )
	{
		prefsStore.setValue( name, value );
		firePreferenceChangeEvent( name,
				new Float( oldValue ),
				new Float( value ) );
	}
}
 

public void setValue( String name, int value )
{
	int oldValue = getInt( name );
	if ( this.preferenceType == SPECIAL_TYPE && project != null )
	{
		Preferences preference = prefs.getReportPreference( project );
		if ( preference != null )
		{
			if ( preference.isDefault( name ) || oldValue != value )
			{
				preference.setValue( name, value );
				firePreferenceChangeEvent( name,
						Integer.valueOf( oldValue ),
						Integer.valueOf( value ) );
			}
			return;
		}
	}
	if ( oldValue != value )
	{
		prefsStore.setValue( name, value );
		firePreferenceChangeEvent( name,
				Integer.valueOf( oldValue ),
				Integer.valueOf( value ) );
	}
}
 

public void setValue( String name, long value )
{
	long oldValue = getLong( name );
	if ( this.preferenceType == SPECIAL_TYPE && project != null )
	{
		Preferences preference = prefs.getReportPreference( project );
		if ( preference != null )
		{
			if ( preference.isDefault( name ) || oldValue != value )
			{
				preference.setValue( name, value );
				firePreferenceChangeEvent( name,
						Long.valueOf( oldValue ),
						Long.valueOf( value ) );
			}
			return;
		}
	}
	if ( oldValue != value )
	{
		prefsStore.setValue( name, value );
		firePreferenceChangeEvent( name,
				Long.valueOf( oldValue ),
				Long.valueOf( value ) );
	}
}
 

public void setValue( String name, String value )
{
	String oldValue = getString( name );
	if ( this.preferenceType == SPECIAL_TYPE && project != null )
	{
		Preferences preference = prefs.getReportPreference( project );
		if ( preference != null )
		{
			if ( preference.isDefault( name ) || !oldValue.equals( value ) )
			{
				preference.setValue( name, value );
				firePreferenceChangeEvent( name, oldValue, value );
			}
			return;
		}
	}
	if ( !oldValue.equals( value ) )
	{
		prefsStore.setValue( name, value );
		firePreferenceChangeEvent( name, oldValue, value );
	}
}
 

public void setValue( String name, boolean value )
{
	boolean oldValue = getBoolean( name );
	if ( this.preferenceType == SPECIAL_TYPE && project != null )
	{
		Preferences preference = prefs.getReportPreference( project );
		if ( preference != null )
		{
			if ( preference.isDefault( name ) || oldValue != value )
			{
				preference.setValue( name, value );
				firePreferenceChangeEvent( name,
						Boolean.valueOf( oldValue ),
						Boolean.valueOf( value ) );
			}
			return;
		}
	}
	if ( oldValue != value )
	{
		prefsStore.setValue( name, value );
		firePreferenceChangeEvent( name,
				Boolean.valueOf( oldValue ),
				Boolean.valueOf( value ) );
	}
}
 

public boolean hasSpecialSettings( Object adaptable, String name )
{
	IProject project = getProject( adaptable );
	if ( project == null )
		return false;
	else
	{
		Preferences preference = getReportPreference( adaptable );
		if ( preference != null )
			return !preference.isDefault( name );
		else
			return false;
	}
}
 

/**
 * Gets the uima pref string.
 *
 * @param key the key
 * @param defaultValue the default value
 * @return the uima pref string
 */
private static String getUimaPrefString(String key, String defaultValue) {
  TAEConfiguratorPlugin plugin = TAEConfiguratorPlugin.getDefault();
  Preferences prefs = plugin.getPluginPreferences();
  boolean isDefault = prefs.isDefault(key);
  if (isDefault)
    prefs.setDefault(key, defaultValue);
  return prefs.getString(key);
}
 

/**
 * Gets the uima pref boolean.
 *
 * @param key the key
 * @param defaultValue the default value
 * @return the uima pref boolean
 */
private static boolean getUimaPrefBoolean(String key, boolean defaultValue) {
  TAEConfiguratorPlugin plugin = TAEConfiguratorPlugin.getDefault();
  Preferences prefs = plugin.getPluginPreferences();
  boolean isDefault = prefs.isDefault(key);
  if (isDefault)
    prefs.setDefault(key, defaultValue);
  return prefs.getBoolean(key);
}
 

/**
 * Gets the uima pref int.
 *
 * @param key the key
 * @param defaultValue the default value
 * @return the uima pref int
 */
private static int getUimaPrefInt(String key, int defaultValue) {
  TAEConfiguratorPlugin plugin = TAEConfiguratorPlugin.getDefault();
  Preferences prefs = plugin.getPluginPreferences();
  boolean isDefault = prefs.isDefault(key);
  if (isDefault)
    prefs.setDefault(key, defaultValue);
  return prefs.getInt(key);
}