Examples of java.util.prefs.Preferences.node()

java.util.prefs.Preferences.node()
Returns the named preference node in the same tree as this node, creating it and any of its ancestors if they do not already exist. Accepts a relative or absolute path name. Relative path names (which do not begin with the slash character ('/')) are interpreted relative to this preference node.
If the returned node did not exist prior to this call, this node and any ancestors that were created by this call are not guaranteed to become permanent until the flush method is called on the returned node (or one of its ancestors or descendants). @param pathName the path name of the preference node to return. @return the specified preference node. @throws IllegalArgumentException if the path name is invalid (i.e.,it contains multiple consecutive slash characters, or ends with a slash character and is more than one character long). @throws NullPointerException if path name is null. @throws IllegalStateException if this node (or an ancestor) has beenremoved with the {@link #removeNode()} method. @see #flush()

        Arrays.sort(children);
        assertEquals("a", children[0]);
        assertEquals("b", children[1]);
        assertEquals(1, prefs2.getLong("pa", 0));
        assertEquals(2, prefs2.node("a").getLong("pb", 0));
        assertEquals(2, prefs2.node("/a").getLong("pb", 0));
        assertEquals(3, prefs2.node("/a/b").getLong("pc", 0));
        Preferences prefs2a = prefs2.node("/a");
        assertEquals(2, prefs2a.getLong("pb", 0));
        assertEquals(-1, prefs2.node("/a/c").getLong("px", -1));
        assertEquals(null, prefs2.node("/a/c").get("py", null));

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        assertEquals("a", children[0]);
        assertEquals("b", children[1]);
        assertEquals(1, prefs2.getLong("pa", 0));
        assertEquals(2, prefs2.node("a").getLong("pb", 0));
        assertEquals(2, prefs2.node("/a").getLong("pb", 0));
        assertEquals(3, prefs2.node("/a/b").getLong("pc", 0));
        Preferences prefs2a = prefs2.node("/a");
        assertEquals(2, prefs2a.getLong("pb", 0));
        assertEquals(-1, prefs2.node("/a/c").getLong("px", -1));
        assertEquals(null, prefs2.node("/a/c").get("py", null));
        Preferences prefs2ab2 = prefs2.node("/a/b2");

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    // by walking up the file path to the script directory and 
    // using each folder as a preference node.
    File file = script.getFile();
    // Core script preferences are placed in the "core" node, all others
    // go into the "scripts" node.
    prefs = prefs.node(script.isCoreScript() ? "core" : "scripts");
    String[] parts = getScriptPath(file, false);
    for (int i = 0, l = parts.length; i < l; i++)
      prefs = prefs.node(parts[i]);
    return prefs;
  }

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    // Core script preferences are placed in the "core" node, all others
    // go into the "scripts" node.
    prefs = prefs.node(script.isCoreScript() ? "core" : "scripts");
    String[] parts = getScriptPath(file, false);
    for (int i = 0, l = parts.length; i < l; i++)
      prefs = prefs.node(parts[i]);
    return prefs;
  }


  private static PrintStream getLogger(String name) {
    try {

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    }
    
    protected final Preferences getNode() {
        Preferences prefs = Preferences.userNodeForPackage(applicationClass);
        for (String node : path) {
            prefs = prefs.node(node);
        }
        return prefs;
    }


    private static boolean equals(Object o1, Object o2) {

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        try {
            Preferences root = Preferences.userRoot();
            Preferences node = root.node(CUSTOM_ID);


            if (node.nodeExists(code)) {
                return node.node(code);
            }


            for( String id : node.childrenNames() ) {
                Preferences child = node.node(id);
                String name = child.get(NAME_ID, null);

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        for (int n = Math.min(prevsSize, connsSize); i < n; ++i)
            storeDiffs(connsNode.node("" + (i+1)), prevs.get(i), conns.get(i));
        for (; i < prevsSize; ++i)
            connsNode.node("" + (i+1)).removeNode();
        for (; i < connsSize; ++i)
            storeTo(conns.get(i), connsNode.node("" + (i+1)));
    }


    private void mergeAEs(Device prevDev, Device dev, Preferences deviceNode)
            throws BackingStoreException {
        Preferences aesNode = deviceNode.node("dcmNetworkAE");

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            throws BackingStoreException {
        Preferences aesNode = deviceNode.node("dcmNetworkAE");
        Collection<String> aets = dev.getApplicationAETitles();
        for (String aet : prevDev.getApplicationAETitles()) {
            if (!aets.contains(aet))
                aesNode.node(aet).removeNode();
        }
        Collection<String> prevAETs = prevDev.getApplicationAETitles();
        List<Connection> devConns = dev.listConnections();
        for (ApplicationEntity ae : dev.getApplicationEntities()) {
            String aet = ae.getAETitle();

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            Preferences parentNode) throws BackingStoreException {
        Preferences acsNode = parentNode.node("dcmAttributeCoercion");
        for (AttributeCoercion prev : prevs) {
            String cn = prev.getCommonName();
            if (acs.findByCommonName(prev.getCommonName()) == null)
                acsNode.node(cn).removeNode();
        }
        for (AttributeCoercion ac : acs) {
            String cn = ac.getCommonName();
            Preferences acNode = acsNode.node(cn);
            AttributeCoercion prev = prevs.findByCommonName(cn);

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            ApplicationEntity ae, Preferences tcsNode, Role role)
                    throws BackingStoreException {
        Preferences roleNode = tcsNode.node(role.name());
        for (TransferCapability tc : prevAE.getTransferCapabilitiesWithRole(role))
            if (ae.getTransferCapabilityFor(tc.getSopClass(), role) == null)
                roleNode.node(tc.getSopClass()).removeNode();
        for (TransferCapability tc : ae.getTransferCapabilitiesWithRole(role)) {
            Preferences tcNode = roleNode.node(tc.getSopClass());
            TransferCapability prev = 
                    prevAE.getTransferCapabilityFor(tc.getSopClass(), role);
            if (prev == null)

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