attributemap.java

来自「JAVA 所有包」· Java 代码 · 共 567 行 · 第 1/2 页

            } else {
                return null;
            }
        }

        return remove((AttrImpl)nodes.elementAt(i), i, true);

    } // internalRemoveNamedItem(String,boolean):Node

    private final Node remove(AttrImpl attr, int index,
                              boolean addDefault) {

        CoreDocumentImpl ownerDocument = ownerNode.ownerDocument();
        String name = attr.getNodeName();
        if (attr.isIdAttribute()) {
            ownerDocument.removeIdentifier(attr.getValue());
        }

        if (hasDefaults() && addDefault) {
            // If there's a default, add it instead
            NamedNodeMapImpl defaults =
                ((ElementImpl) ownerNode).getDefaultAttributes();

            Node d;
            if (defaults != null &&
                (d = defaults.getNamedItem(name)) != null &&
                findNamePoint(name, index+1) < 0) {
                    NodeImpl clone = (NodeImpl)d.cloneNode(true);
                    if (d.getLocalName() !=null){
                            // we must rely on the name to find a default attribute
                            // ("test:attr"), but while copying it from the DOCTYPE
                            // we should not loose namespace URI that was assigned
                            // to the attribute in the instance document.
                            ((AttrNSImpl)clone).namespaceURI = attr.getNamespaceURI();
                    } 
                    clone.ownerNode = ownerNode;
                    clone.isOwned(true);
                    clone.isSpecified(false);
                
                    nodes.setElementAt(clone, index);
                    if (attr.isIdAttribute()) {
                        ownerDocument.putIdentifier(clone.getNodeValue(),
                                                (ElementImpl)ownerNode);
                    }
            } else {
                nodes.removeElementAt(index);
            }
        } else {
            nodes.removeElementAt(index);
        }

        //        changed(true);

        // remove reference to owner
        attr.ownerNode = ownerDocument;
        attr.isOwned(false);

        // make sure it won't be mistaken with defaults in case it's
        // reused
        attr.isSpecified(true);
        attr.isIdAttribute(false);

        // notify document
        ownerDocument.removedAttrNode(attr, ownerNode, name);

        return attr;
    }
    
    /**
     * Introduced in DOM Level 2. <p>
     * Removes an attribute specified by local name and namespace URI.
     * @param namespaceURI
     *                      The namespace URI of the node to remove.
     *                      When it is null or an empty string, this
     *                      method behaves like removeNamedItem.
     * @param               The local name of the node to remove. If the
     *                      removed attribute is known to have a default
     *                      value, an attribute immediately appears
     *                      containing the default value.
     * @return Node         The node removed from the map if a node with such
     *                      a local name and namespace URI exists.
     * @throws              NOT_FOUND_ERR: Raised if there is no node named
     *                      name in the map.
     */
    public Node removeNamedItemNS(String namespaceURI, String name)
        throws DOMException {
        return internalRemoveNamedItemNS(namespaceURI, name, true);
    }

    /**
     * Same as removeNamedItem except that it simply returns null if the
     * specified local name and namespace URI is not found.
     */
    Node safeRemoveNamedItemNS(String namespaceURI, String name) {
        return internalRemoveNamedItemNS(namespaceURI, name, false);
    }

    /**
     * Internal removeNamedItemNS method allowing to specify whether an
     * exception must be thrown if the specified local name and namespace URI
     * is not found.
     */
    final protected Node internalRemoveNamedItemNS(String namespaceURI,
            String name,
            boolean raiseEx) {
        
        CoreDocumentImpl ownerDocument = ownerNode.ownerDocument();
        if (ownerDocument.errorChecking && isReadOnly()) {
            String msg = DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "NO_MODIFICATION_ALLOWED_ERR", null);
            throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR, msg);            
        }
        int i = findNamePoint(namespaceURI, name);
        if (i < 0) {
            if (raiseEx) {
                String msg = DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "NOT_FOUND_ERR", null);
                throw new DOMException(DOMException.NOT_FOUND_ERR, msg);
            } else {
                return null;
            }
        }
        
        AttrImpl n = (AttrImpl)nodes.elementAt(i);
        
        if (n.isIdAttribute()) {
            ownerDocument.removeIdentifier(n.getValue());
        }
        // If there's a default, add it instead
        String nodeName = n.getNodeName();
        if (hasDefaults()) {
            NamedNodeMapImpl defaults = ((ElementImpl) ownerNode).getDefaultAttributes();
            Node d;
            if (defaults != null
                    && (d = defaults.getNamedItem(nodeName)) != null)
            {
                int j = findNamePoint(nodeName,0);
                if (j>=0 && findNamePoint(nodeName, j+1) < 0) {
                    NodeImpl clone = (NodeImpl)d.cloneNode(true);
                    clone.ownerNode = ownerNode;
                    if (d.getLocalName() != null) {
                        // we must rely on the name to find a default attribute
                        // ("test:attr"), but while copying it from the DOCTYPE
                        // we should not loose namespace URI that was assigned
                        // to the attribute in the instance document.
                        ((AttrNSImpl)clone).namespaceURI = namespaceURI;
                    }
                    clone.isOwned(true);
                    clone.isSpecified(false);
                    nodes.setElementAt(clone, i);
                    if (clone.isIdAttribute()) {
                        ownerDocument.putIdentifier(clone.getNodeValue(), 
                                (ElementImpl)ownerNode);
                    }
                } else {
                    nodes.removeElementAt(i);
                }
            } else {
                nodes.removeElementAt(i);
            }
        } else {
            nodes.removeElementAt(i);
        }
        
        //        changed(true);
        
        // remove reference to owner
        n.ownerNode = ownerDocument;
        n.isOwned(false);
        // make sure it won't be mistaken with defaults in case it's
        // reused
        n.isSpecified(true);
        // update id table if needed
        n.isIdAttribute(false);
        
        // notify document
        ownerDocument.removedAttrNode(n, ownerNode, name);
        
        return n;
        
    } // internalRemoveNamedItemNS(String,String,boolean):Node

    //
    // Public methods
    //

    /**
     * Cloning a NamedNodeMap is a DEEP OPERATION; it always clones
     * all the nodes contained in the map.
     */
     
    public NamedNodeMapImpl cloneMap(NodeImpl ownerNode) {
        AttributeMap newmap =
            new AttributeMap((ElementImpl) ownerNode, null);
        newmap.hasDefaults(hasDefaults());
        newmap.cloneContent(this);
        return newmap;
    } // cloneMap():AttributeMap

    /**
     * Override parent's method to set the ownerNode correctly
     */
    protected void cloneContent(NamedNodeMapImpl srcmap) {
        Vector srcnodes = srcmap.nodes;
        if (srcnodes != null) {
            int size = srcnodes.size();
            if (size != 0) {
                if (nodes == null) {
                    nodes = new Vector(size);
                }
                nodes.setSize(size);
                for (int i = 0; i < size; ++i) {
                    NodeImpl n = (NodeImpl) srcnodes.elementAt(i);
                    NodeImpl clone = (NodeImpl) n.cloneNode(true);
                    clone.isSpecified(n.isSpecified());
                    nodes.setElementAt(clone, i);
                    clone.ownerNode = ownerNode;
                    clone.isOwned(true);
                }
            }
        }
    } // cloneContent():AttributeMap


    /**
     * Move specified attributes from the given map to this one
     */
    void moveSpecifiedAttributes(AttributeMap srcmap) {
        int nsize = (srcmap.nodes != null) ? srcmap.nodes.size() : 0;
        for (int i = nsize - 1; i >= 0; i--) {
            AttrImpl attr = (AttrImpl) srcmap.nodes.elementAt(i);
            if (attr.isSpecified()) {
                srcmap.remove(attr, i, false);
                if (attr.getLocalName() != null) {
                    setNamedItem(attr);
                }
                else {
                    setNamedItemNS(attr);
                }
            }
        }
    } // moveSpecifiedAttributes(AttributeMap):void


    /**
     * Get this AttributeMap in sync with the given "defaults" map.
     * @param defaults The default attributes map to sync with.
     */
    protected void reconcileDefaults(NamedNodeMapImpl defaults) {

        // remove any existing default
        int nsize = (nodes != null) ? nodes.size() : 0;
        for (int i = nsize - 1; i >= 0; i--) {
            AttrImpl attr = (AttrImpl) nodes.elementAt(i);
            if (!attr.isSpecified()) {
                remove(attr, i, false);
            }
        }
        // add the new defaults
        if (defaults == null) {
            return;
        }
        if (nodes == null || nodes.size() == 0) {
            cloneContent(defaults);
        }
        else {
            int dsize = defaults.nodes.size();
            for (int n = 0; n < dsize; n++) {
                AttrImpl d = (AttrImpl) defaults.nodes.elementAt(n);
                int i = findNamePoint(d.getNodeName(), 0); 
                if (i < 0) {
            		i = -1 - i; 
                    NodeImpl clone = (NodeImpl) d.cloneNode(true);
                    clone.ownerNode = ownerNode;
                    clone.isOwned(true);
                    clone.isSpecified(false);
            		nodes.insertElementAt(clone, i);
                }
            }
        }

    } // reconcileDefaults()

} // class AttributeMap