532 Appendix C Source Code for bonForum Web Application if(pathToSubTreeRootNode == null || pathToSubTreeRootNode.length() < 1) { pathToSubTreeRootNode = “”; } parentNodeInDestination = parentNodeInDestination.trim(); if(parentNodeInDestination == null || parentNodeInDestination.length() < 1) { parentNodeInDestination = “things”; } // parse document try { DOMParser parser = new DOMParser(); parser.parse(xmlUri); Document document = parser.getDocument(); try { loadForumXML(pathToSubTreeRootNode, parentNodeInDestination, document, “pathNameHashtable”, sessionId); } catch(Exception ee) { log(sessionId, “err”, “caught exception trying to load into bonForumXML: “+ xmlUri); } } catch(Exception ex) { log(sessionId, “err”, “caught exception trying to parse: “ + xmlUri); } } /** Loads XML from URI into “bonBufferXML” ForestHashtable member. * * * @param pathToSubTreeRootNode String * @param xmlUri String * @param nodeKeyHashtableName String * @param sessionId String */ protected void loadBufferXMLFromURI(String pathToSubTreeRootNode, String parentNodeInDestination, String xmlUri, String nodeKeyHashtableName, String sessionId) { pathToSubTreeRootNode = pathToSubTreeRootNode.trim(); if(pathToSubTreeRootNode == null || pathToSubTreeRootNode.length() < 1) { pathToSubTreeRootNode = “”; } parentNodeInDestination = parentNodeInDestination.trim(); if(parentNodeInDestination == null || parentNodeInDestination.length() < 1) { parentNodeInDestination = “things”; } // parse document try { 15 1089-9 XC 6/26/01 7:40 AM Page 532 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 533 C.17 Filename: Projects\bonForum\src\de\tarent\forum\BonForumStore.java DOMParser parser = new DOMParser(); parser.parse(xmlUri); Document document = parser.getDocument(); try { loadBufferXML(pathToSubTreeRootNode, parentNodeInDestination, document, “pathNameHashtable”, sessionId); } catch(Exception ee) { log(sessionId, “err”, “caught exception trying to load into bonBufferXML: “+ xmlUri); } } catch(Exception ex) { log(sessionId, “err”, “caught exception trying to parse: “ + xmlUri); } } /** Loads XML from DOM node into “bonForumXML” ForestHashtable member. * * * @param pathToSubTreeRootNode String * @param parentNodeInDestination String * @param node Node * @param nodeKeyHashtableName String * @param sessionId String */ protected void loadForumXML(String pathToSubTreeRootNode, String parentNodeInDestination, Node node, String nodeKeyHashtableName, String sessionId) { Object parentNodeKey = null; String nodeKeyPathName = “”; boolean foundParentNodeKey = true; // assume success if(parentNodeInDestination.equals(“actors”)) { parentNodeKey = (Object)getActorsNodeKey(); } else if(parentNodeInDestination.equals(“actions”)) { parentNodeKey = (Object)getActionsNodeKey(); } else if(parentNodeInDestination.equals(“things”)) { parentNodeKey = (Object)getThingsNodeKey(); } else { if (getBonForumXML().getNodeNameHashtable().containsKey(parentNodeInDestination)) { parentNodeKey = getBonForumXML().getNodeNameHashtable().get(parentNodeInDestination); } else { foundParentNodeKey = false; } } 15 1089-9 XC 6/26/01 7:40 AM Page 533 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 534 Appendix C Source Code for bonForum Web Application if(parentNodeKey != null && foundParentNodeKey) { try { // needs test and finishing, especially pathToSubTreeRootNode argument loadXMLSubTreeIntoForestHashtable(node, parentNodeKey, bonForumXML, nodeKeyPathName, nodeKeyHashtableName, sessionId); } catch(Exception ee) { log(sessionId, “err”, “loadForumXML() caught Exception invoking loadXMLSubTreeIntoForestHashtable()”); } } } /** Loads XML from DOM node into the bonBufferXML ForestHashtable. * * * @param pathToSubTreeRootNode String * @param parentNodeInDestination String * @param node Node * @param nodeKeyHashtableName String * @param sessionId String */ protected void loadBufferXML(String pathToSubTreeRootNode, String parentNodeInDestination, Node node, String nodeKeyHashtableName, String sessionId) { Object parentNodeKey = null; String nodeKeyPathName = “”; boolean foundParentNodeKey = true; // assume success if(parentNodeInDestination.equals(“actors”)) { parentNodeKey = (Object)getBufferActorsNodeKey(); } else if(parentNodeInDestination.equals(“actions”)) { parentNodeKey = (Object)getBufferActionsNodeKey(); } else if(parentNodeInDestination.equals(“things”)) { parentNodeKey = (Object)getBufferThingsNodeKey(); } else { if (bonBufferXML.getNodeNameHashtable().containsKey(parentNodeInDestination)) { parentNodeKey = bonBufferXML.getNodeNameHashtable().get(parentNodeInDestination); } else { foundParentNodeKey = false; } } if(parentNodeKey != null && foundParentNodeKey) { try { // needs test and finishing, especially pathToSubTreeRootNode argument 15 1089-9 XC 6/26/01 7:40 AM Page 534 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 535 C.17 Filename: Projects\bonForum\src\de\tarent\forum\BonForumStore.java loadXMLSubTreeIntoForestHashtable(node, parentNodeKey, bonBufferXML, nodeKeyPathName, nodeKeyHashtableName, sessionId); } catch(Exception ee) { log(sessionId, “err”, “loadBufferXML() caught Exception invoking loadXMLSubTreeIntoForestHashtable()”); } } } /** Loads the specified node, recursively, into a ForestHashtable. * NOTE: only loads element nodes with attributes, and any text node children. * * @param node Node * @param parentNodeKey Object * @param forestHashtable ForestHashtable * @param nodeKeyPathName String * @param nodeKeyHashtableName String * @param sessionId String */ protected void loadXMLSubTreeIntoForestHashtable(Node node, Object parentNodeKey, ForestHashtable forestHashtable, String nodeKeyPathName, String nodeKeyHashtableName, String sessionId) { String nodeName = “”; String nodeAttributes = “”; String nodeContent = “”; Object nextParentNodeKey = parentNodeKey; String pathName = “”; if ( node == null ) { return; } // the ForestHashtable instance must exist for this method to work int type = node.getNodeType(); switch(type) { // process document node case Node.DOCUMENT_NODE: { loadXMLSubTreeIntoForestHashtable(((Document)node).getDocumentElement(), parentNodeKey, forestHashtable, nodeKeyPathName, nodeKeyHashtableName, sessionId); break; } // process element with attributes, and also get text nodes for content case Node.ELEMENT_NODE: { nodeName = node.getNodeName(); // LATER: here can wait for element named by pathToSubTreeRootNode, ignoring ancestors Attr attrs[] = BonForumUtils.sortAttributes(node.getAttributes()); nodeAttributes = “”; for ( int i = 0; i < attrs.length; i++ ) { Attr attr = attrs[i]; 15 1089-9 XC 6/26/01 7:40 AM Page 535 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 536 Appendix C Source Code for bonForum Web Application nodeAttributes += (“ “); nodeAttributes += (attr.getNodeName()); nodeAttributes += (“=\””); nodeAttributes += (normalize(attr.getNodeValue())); nodeAttributes += (“\””); } // adds node and gets its nodeKey BonNode bonNode; bonNode = forestHashtable.addChildNodeToNonRootNode(nodeName, nodeAttributes, nodeContent, (NodeKey)parentNodeKey, nodeKeyHashtableName, sessionId); nextParentNodeKey = (Object)forestHashtable.nodeKeyFromBonNode(bonNode); // optionally save nodeKey in a hashtable to use for fast lookups, pathname sorting, etc. if(nodeKeyHashtableName != null && nodeKeyHashtableName != “”) { if(nodeKeyHashtableName.equals(“pathNameHashtable”)) { // here optionally save nodeKey with a pathName key // only save descendants of bonForum.things.subjects if (nodeKeyPathName.equals(“”)) { if( (!(nodeName.equals(“bonForum”))) && (!(nodeName.equals(“things”))) && (!(nodeName.equals(“subjects”))) ) { nodeKeyPathName = nodeName; } } else { // build the pathName by concatenating node just added nodeKeyPathName = nodeKeyPathName + “.” + nodeName; } if(!nodeKeyPathName.equals(“”)) { forestHashtable.getPathNameHashtable().put(nodeKeyPathName, nextParentNodeKey); } } else { // later we can add other types of hashtables here } } // here we get text nodes for our content, and recursively visit element descendants // we are ignoring ENTITY_REFERENCE_NODE, CDATA_SECTION_NODE, PROCESSING_INSTRUCTION_NODE NodeList children = node.getChildNodes(); if ( children != null ) { int len = children.getLength(); for ( int i = 0; i < len; i++ ) { // get text if any, else recursively visit element children 15 1089-9 XC 6/26/01 7:40 AM Page 536 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 537 C.17 Filename: Projects\bonForum\src\de\tarent\forum\BonForumStore.java int nodeType = children.item(i).getNodeType(); if(nodeType == Node.TEXT_NODE) { nodeContent += “ “ + normalize(children.item(i).getNodeValue().trim()); } else if(nodeType == Node.ELEMENT_NODE) { // recursion to visit all subnodes loadXMLSubTreeIntoForestHashtable(children.item(i), nextParentNodeKey, forestHashtable, nodeKeyPathName, nodeKeyHashtableName, sessionId); } } } // edit the node to add content from text node nodeContent = nodeContent.trim(); if(nodeContent.length() > 0) { NodeKey nk = getBonForumXML().editBonNode((NodeKey)(nextParentNodeKey), null, null, nodeContent); } break; } // end case Node.ELEMENT_NODE } // end switch } /** Adds a node to “bonForumXML” ForestHashtable member. * * @param command = “bonAddElement” (others could follow) * @param parentNodeKeyKey String * @param nameAndAttributes String * @param content String * @param forestHashtableName String * @param nodeKeyHashtableName String * @param sessionId String * @return Object that can be cast to a NodeKey */ protected Object add(String command, String parentNodeKeyKey, String nameAndAttributes, String content, String forestHashtableName, String nodeKeyHashtableName, String sessionId) { BonNode bonNode = new BonNode(); NodeKey nonRootNodeKey = new NodeKey(); nonRootNodeKey = (NodeKey)addNode(bonNode, nonRootNodeKey, command, parentNodeKeyKey, nameAndAttributes, content, forestHashtableName, nodeKeyHashtableName, sessionId); return (Object)(nonRootNodeKey); } /** Adds a node to “bonBufferXML” ForestHashtable member. * * @param command = “bonAddElement” (others could follow) * @param parentNodeKeyKey String * @param nameAndAttributes String * @param content String 15 1089-9 XC 6/26/01 7:40 AM Page 537 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 538 Appendix C Source Code for bonForum Web Application * @param forestHashtableName String * @param nodeKeyHashtableName String * @param sessionId String * @return Object that can be cast to a NodeKey */ protected Object addToBuffer(String command, String parentNodeKeyKey, String nameAndAttributes, String content, String forestHashtableName, String nodeKeyHashtableName, String sessionId) { BonNode bonNode = new BonNode(); NodeKey nonRootNodeKey = new NodeKey(); nonRootNodeKey = (NodeKey)addNode(bonNode, nonRootNodeKey, command, parentNodeKeyKey, nameAndAttributes, content, forestHashtableName, nodeKeyHashtableName, sessionId); return (Object)(nonRootNodeKey); } /** Adds a node to “bonForumXML”, or “bonBufferXML”, or other ForestHashtable. * * @param bonNode BonNode * @param nonRootNodeKey NodeKey * @param command String =”bonAddElement” (others could follow) * @param parentNodeKeyKey String * @param nameAndAttributes String * @param content String * @param forestHashtableName String * @param nodeKeyHashtableName String * @param sessionId String * @return Object that can be cast to a NodeKey */ protected Object addNode(BonNode bonNode, NodeKey nonRootNodeKey, String command, String parentNodeKeyKey, String nameAndAttributes, String content, String forestHashtableName, String nodeKeyHashtableName, String sessionId) { boolean fast = false; ForestHashtable forestHashtable; if(forestHashtableName.equals(“bonForumXML”)) { forestHashtable = bonForumXML; if (parentNodeKeyKey.equals(“actors”)) { nonRootNodeKey = getActorsNodeKey(); fast = true; } else if (parentNodeKeyKey.equals(“actions”)) { nonRootNodeKey = getActionsNodeKey(); fast = true; } else if (parentNodeKeyKey.equals(“things”)) { nonRootNodeKey = getThingsNodeKey(); fast = true; } } else if(forestHashtableName.equals(“bonBufferXML”)) { 15 1089-9 XC 6/26/01 7:40 AM Page 538 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 539 C.17 Filename: Projects\bonForum\src\de\tarent\forum\BonForumStore.java forestHashtable = bonBufferXML; if (parentNodeKeyKey.equals(“actors”)) { nonRootNodeKey = getBufferActorsNodeKey(); fast = true; } else if (parentNodeKeyKey.equals(“actions”)) { nonRootNodeKey = getBufferActionsNodeKey(); fast = true; } else if (parentNodeKeyKey.equals(“things”)) { nonRootNodeKey = getBufferThingsNodeKey(); fast = true; } } else { forestHashtable = null; } if (command.equals(“bonAddElement”)) { try { if(!fast) { // not a “fast” parent nodeKey // // There are two possibilities (more later): // // 1. The parentNodeKey is saved in nodeNameHashtable. // The parentNodeKeyKey format has one of two formats: // // The first format is: // sessionID_creationTimeMillis:parentElementName // (e.g., “To1012mC7576871324604071At:985400336097:chat”) // // The second format is: // sessionID:parentElementName // (e.g., “To1012mC7576871324604071At:messageKey”) // // 2. The parentNodeKey is saved in pathNameHashtable. // The parentNodeKeyKey used is the pathName to the // subject node (e.g., “Vehicles.Motorcycles.Triumph”). // // If the parentNodeKeyKey is not “actors”, “actions”, “things”, // then the parentNodeKeyKey is a key into a Hashtable // with the name nodeKeyHashtableName 15 1089-9 XC 6/26/01 7:40 AM Page 539 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 540 Appendix C Source Code for bonForum Web Application // if(nodeKeyHashtableName.equals(“pathNameHashtable”)) { if(forestHashtable.getPathNameHashtable().containsKey(parentNodeKeyKey)) { nonRootNodeKey = (NodeKey)forestHashtable.getPathNameHashtable().get(parentNodeKeyKey); } else { log(sessionId, “err”, “add() DID NOT FIND parentNodeKeyKey IN pathNameHashtable: “ + parentNodeKeyKey); } } // The key should be in <sessionId:nodeName> format // we could later check the incoming sessionId prefix is valid // using isRequestedSessionIdValid(prefix) else if (nodeKeyHashtableName.equals(“nodeNameHashtable”)) { String temp = “” + forestHashtable.getNodeNameHashtable().size(); if (forestHashtable.getNodeNameHashtable().containsKey(parentNodeKeyKey)) { nonRootNodeKey = (NodeKey)forestHashtable.getNodeNameHashtable().get(parentNodeKeyKey); } else { log(sessionId, “err”, “add() DID NOT FIND parentNodeKeyKey IN nodeNameHashtable: “ + parentNodeKeyKey); } } else { log(sessionId, “err”, “UNRECOGNIZED nodeKeyHashtableName in add(): “ + parentNodeKeyKey); } } try { if(nonRootNodeKey != null) { if(nonRootNodeKey.aKey != null && nonRootNodeKey.aKey.length() > 0) { String name = “”; String attributes = “”; if(nameAndAttributes == null) { nameAndAttributes = “”; } int inx = nameAndAttributes.trim().indexOf(‘ ‘); if (inx > -1) { // space between name and attributes name = nameAndAttributes.substring(0, inx); 15 1089-9 XC 6/26/01 7:40 AM Page 540 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 541 C.17 Filename: Projects\bonForum\src\de\tarent\forum\BonForumStore.java attributes = nameAndAttributes.substring(inx).trim(); } else { name = nameAndAttributes; } bonNode = forestHashtable.addChildNodeToNonRootNode(name, attributes, content, nonRootNodeKey, nodeKeyHashtableName, sessionId); } } } catch (Exception ex) { log(sessionId, “err”, “addChildNodeToNonRootNode() caused exception in add()”); } } catch (Exception ee) { log(sessionId, “err”, “Exception in add()”); } } return (Object)(bonNode.nodeKey); } /** Removes a (session-dependent) node from “bonForumXML” ForestHashtable member. * @param command String = “bonRemoveElement” (others later) * @param nodeKeyKey String * @param leafOnly String if uppercased is “TRUE” nodes with children not removed * @param forestHashtableName String */ protected void remove(String command, String nodeKeyKey, String leafOnly, String forestHashtableName) { removeNode (command, nodeKeyKey, leafOnly, forestHashtableName); } /** Removes a (session-dependent) node from “bonBufferXML” ForestHashtable member. * @param command String = “bonRemoveElement” (others later) * @param nodeKeyKey String * @param leafOnly String if uppercased is “TRUE” nodes with children not removed * @param forestHashtableName String */ protected void removeFromBuffer(String command, String nodeKeyKey, String leafOnly, String forestHashtableName) { removeNode (command, nodeKeyKey, leafOnly, forestHashtableName); } /** Removes a node from a ForestHashtable. * (for now: only non-global nodes removed) * @param command String = “bonRemoveElement” (others later) * @param nodeKeyKey String 15 1089-9 XC 6/26/01 7:40 AM Page 541 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. [...]... “Exception in remove()”); } } } /** Gets the NodeKey for a pathName in a pathNameHashtable * (The NodeKey for each element in the “subjects” subtree * is also in a pathNameHashtable, with a pathName key) * * @param pathName String * @param pathNameHashtable PathNameHashtable * @return NodeKey for the pathName */ protected NodeKey subjectNodeKeyFromPathName(String pathName, PathNameHashtable pathNameHashtable)... (NodeKey)pathNameHashtable.get(pathName); } /** Returns the BonNode for a subject from a ForestHashtable * (The subject pathName is a key value for a NodeKey in a PathNameHashtable) * Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark 15 1089-9 XC 6/26/01 7:40 AM Page 544 544 Appendix C Source Code for bonForum Web Application * @param pathName String * @param pathNameHashtable PathNameHashtable... PathNameHashtable * @param forestHashtable ForestHashtable * @return NodeKey for the pathName */ protected BonNode subjectBonNodeFromPathName(String pathName, PathNameHashtable pathNameHashtable, ForestHashtable forestHashtable) { NodeKey nodeKey = subjectNodeKeyFromPathName(pathName, pathNameHashtable); if(forestHashtable.getNodeNameHashtable().contains(nodeKey)) { return (BonNode)forestHashtable.get(nodeKey);... chat actorKeys = getGuestKeysInChat(chatNodeKeyKey); } else { // actor is host, get list of hosts in chat actorKeys = getHostKeysInChat(chatNodeKeyKey); } // chatActor strings contain actorNickname, age:actorAge and rating:actorRating // Here is an example: // John Doe age:12 rating:5 // NOTE THIS DEPENDS ON XSL DOCUMENT RIGHT NOW! // strip off the age and rating int inx = chatActor.lastIndexOf(“age:”);... outputTreeMap; } /** Outputs the messages in the session’s current chat from bonForumXML as a TreeMap * The TreeMap can be used as a sorted list of the messages for that session’s chat * * @param command String (reserved argument, available from ChoiceTag) * @param option1 String (reserved argument, available from ChoiceTag) * @param option2 String (reserved argument, available from ChoiceTag) * @param option3... the messages for that session’s chat * * @param command String (reserved argument, available from ChoiceTag) * @param option1 String (reserved argument, available from ChoiceTag) * @param option2 String (reserved argument, available from ChoiceTag) * @param option3 String (reserved argument, available from ChoiceTag) * @param session HttpSession (e.g., pageContext.getSession()) * @return TreeMap */ protected... argument, available from ChoiceTag) * @param pathToSubTreeRootNode String * @param option1 String (reserved argument, available from ChoiceTag) * @param option2 String (reserved argument, available from ChoiceTag) * @return TreeMap */ protected TreeMap outputBufferPathNames(String command, String pathToSubTreeRootNode, String option1, String option2) { // the command argument can later be used to provide tag-visible... (String)session.getAttribute(“chatMessagesNavigator”); if(!navigation.equals(“same”) && !navigation.equals(“first”) && !navigation.equals(“previous”) && !navigation.equals(“next”) && !navigation.equals(“last”)) { navigation = “last”; } } catch(Exception ee) { log(sessionId, “err”, “outputBufferChatMessages(), exception getting session attribute chatMessagesNavigator, using \”last\””); navigation = “last”; } Please... You can add an option arg to do that! Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark 15 1089-9 XC 6/26/01 7:40 AM Page 546 546 Appendix C Source Code for bonForum Web Application * (chatItem elements have names that are equal to: * “sessionID_” + chatCreatorHostSessionId + chatNodeCreationTimeInMillis), * * @param command String (unused, available argument) * @param pathToSubTreeRootNode... bonBufferXML IS READY>>>”); } } } /** Adds one attribute (name=value) to a chat node in bonForumXML ForestHashtable * * @param chatNodeKeyKey String (“::chat”) * @param attrName String * @param attrValue String * * @return NodeKey of chat node affected, or null if key no good */ public NodeKey addChatNodeAttribute(String chatNodeKeyKey, String attrName, String attrValue) { . each element in the “subjects” subtree * is also in a pathNameHashtable, with a pathName key). * * @param pathName String * @param pathNameHashtable PathNameHashtable. Code for bonForum Web Application * @param pathName String * @param pathNameHashtable PathNameHashtable * @param forestHashtable ForestHashtable * @return