Bug 82231 [build path] Hard to find type restriction compiler problem preferences
I20050104-1600 There compiler preference page contains a Warning/Error node with many sub-entries . I tried to find where I could change the 'warning' for the access of internal types to 'error'. No luck until I realized that the Build node also contains Warning/Error settings.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/BuildPathsBlock.java
* but all existing settings will be cleared and replace by the given or default paths.
	 * @param jproject The java project to configure. Does not have to exist.
	 * @param outputLocation The output location to be set in the page. If <code>null</code>
	 * is passed, jdt default settings are used, or - if the project is an existing Java project- the
	 * output location of the existing project 
	 * @param classpathEntries The classpath entries to be set in the page. If <code>null</code>
	 * is passed, jdt default settings are used, or - if the project is an existing Java project - the
	 * classpath entries of the existing project
	 */	
	public void init(IJavaProject jproject, IPath outputLocation, IClasspathEntry[] classpathEntries) {
		fCurrJProject= jproject;
		boolean projectExists= false;
		List newClassPath= null;
		IProject project= fCurrJProject.getProject();
		projectExists= (project.exists() && project.getFile(".classpath").exists()); 
		if  (projectExists) {
			if (outputLocation == null) {
				outputLocation=  fCurrJProject.readOutputLocation();
			}
			if (classpathEntries == null) {
				classpathEntries=  fCurrJProject.readRawClasspath();
			}
		}
		if (outputLocation == null) {
			outputLocation= getDefaultBuildPath(jproject);
		}			
		if (classpathEntries != null) {
			newClassPath= getExistingEntries(classpathEntries);
		}
		if (newClassPath == null) {