Examples of org.osgi.service.prefs.Preferences.nodeExists()

Class org.osgi.service.prefs.Preferences

Examples of org.osgi.service.prefs.Preferences.nodeExists()

org.osgi.service.prefs.Preferences.nodeExists()
Returns true if the named node exists. Accepts a relative or absolute pathname. Absolute pathnames (which begin with {@code '/'}) are interpreted relative to the root of this node. Relative pathnames (which begin with any character other than {@code '/'}) are interpreted relative to this node itself. The pathname {@code ""} is valid, and refers to thisnode itself.
If this node (or an ancestor) has already been removed with the {@link #removeNode()} method, it is legal to invoke this method,but only with the pathname {@code ""}; the invocation will return {@code false}. Thus, the idiom {@code p.nodeExists("")} may be used totest whether {@code p} has been removed. @param pathName the path name of the node whose existence is to bechecked. @return true if the specified node exists. @throws BackingStoreException if this operation cannot be completed dueto a failure in the backing store, or inability to communicate with it. @throws IllegalStateException if this node (or an ancestor) has beenremoved with the {@link #removeNode()} method and{@code pathname} is not the empty string ({@code ""}). @throws IllegalArgumentException if the path name is invalid (i.e., itcontains multiple consecutive slash characters, or ends with a slash character and is more than one character long).

    }


    protected boolean loadState() {
        try {
            Preferences prefs = preferences.getUserPreferences("FeaturesServiceState");
            if (prefs.nodeExists("repositories")) {
                Set<URL> repositories = loadSet(prefs.node("repositories"));
                for (URL repo : repositories) {
                    internalAddRepository(repo);
                }
                installed = loadMap(prefs.node("features"));

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    }


    protected boolean loadState() {
        try {
            Preferences prefs = preferences.getUserPreferences("FeaturesServiceState");
            if (prefs.nodeExists("repositories")) {
                Set<URI> repositories = loadSet(prefs.node("repositories"));
                for (URI repo : repositories) {
                    internalAddRepository(repo);
                }
                installed = loadMap(prefs.node("features"));

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        throws BackingStoreException
        
    {
        final Preferences prefs = getPreferencesRoot( createIfNecessary );
        
        if( prefs != null && ( prefs.nodeExists( PREFS_GLOBAL ) || createIfNecessary ) )
        {
            return prefs.node( PREFS_GLOBAL );
        }
        
        return null;

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            level2 = editorInput.getClass().getName();
        }
        
        Preferences prefs = getPreferencesRoot( createIfNecessary );
        
        if( prefs != null && ( prefs.nodeExists( level1 ) || createIfNecessary ) )
        {
            prefs = prefs.node( level1 );
            
            if( prefs.nodeExists( level2 ) || createIfNecessary )
            {

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        if( prefs != null && ( prefs.nodeExists( level1 ) || createIfNecessary ) )
        {
            prefs = prefs.node( level1 );
            
            if( prefs.nodeExists( level2 ) || createIfNecessary )
            {
                return prefs.node( level2 );
            }
        }

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        final IScopeContext scope = new InstanceScope();
        
        final Preferences prefs = scope.getNode( this.pluginId );
        final String editorId = getClass().getName();
        
        if( prefs.nodeExists( editorId ) || createIfNecessary )
        {
            return prefs.node( editorId );
        }
        
        return null;

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      Preferences node = getConfigurationNode();
      if (id == null) {
        int i = node.childrenNames().length;
        while (true) {
          id = getIdPrefix() + (++i);
          if (!node.nodeExists(id)) {
            break;
          }
        }
      }
      Preferences chlld = node.node(id);

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  public IEclipsePreferences preApply(IEclipsePreferences node) {
    // the node does not need to be the root of the hierarchy
    Preferences root = node.node("/"); //$NON-NLS-1$
    try {
      // we must not create empty preference nodes, so first check if the node exists
      if (root.nodeExists(InstanceScope.SCOPE)) {
        Preferences instance = root.node(InstanceScope.SCOPE);
        // we must not create empty preference nodes, so first check if the node exists
        if (instance.nodeExists(JavaCore.PLUGIN_ID)) {
          cleanJavaCore(instance.node(JavaCore.PLUGIN_ID));
        }

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    try {
      // we must not create empty preference nodes, so first check if the node exists
      if (root.nodeExists(InstanceScope.SCOPE)) {
        Preferences instance = root.node(InstanceScope.SCOPE);
        // we must not create empty preference nodes, so first check if the node exists
        if (instance.nodeExists(JavaCore.PLUGIN_ID)) {
          cleanJavaCore(instance.node(JavaCore.PLUGIN_ID));
        }
      }
    } catch (BackingStoreException e) {
      // do nothing

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    try {
      // be careful looking up for our node so not to create any nodes as side effect
      Preferences node = PROJECT_SCOPE;
      //TODO once bug 90500 is fixed, should be simpler
      // for now, take the long way
      if (!node.nodeExists(projectName))
        return false;
      node = node.node(projectName);
      if (!node.nodeExists(Platform.PI_RUNTIME))
        return false;
      node = node.node(Platform.PI_RUNTIME);

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