Package org.htmlunit.cyberneko.xerces.dom

Class CharacterDataImpl

  • All Implemented Interfaces:
    Cloneable, EventTarget, Node, NodeList
    Direct Known Subclasses:
    CommentImpl, ProcessingInstructionImpl, TextImpl
    public abstract class CharacterDataImpl
extends ChildNode
    CharacterData is an abstract Node that can carry character data as its Value. It provides shared behavior for Text, CData, and possibly other node types. All offsets are 0-based.

    Since ProcessingInstructionImpl inherits from this class to reuse the setNodeValue method, this class isn't declared as implementing the interface CharacterData. This is done by relevant subclasses (TexImpl, CommentImpl).

    This class doesn't directly support mutation events, however, it notifies the document when mutations are performed so that the document class do so.

    • Field Detail

      • data_

        protected String data_

    • Constructor Detail

      • CharacterDataImpl

        protected CharacterDataImpl​(CoreDocumentImpl ownerDocument,
                            String data)
        Factory constructor.
        Parameters:
        ownerDocument - the owner document
        data - the data

    • Method Detail

      • getChildNodes

        public NodeList getChildNodes()
        Obtain a NodeList enumerating all children of this node. If there are none, an (initially) empty NodeList is returned.

        NodeLists are "live"; as children are added/removed the NodeList will immediately reflect those changes. Also, the NodeList refers to the actual nodes, so changes to those nodes made via the DOM tree will be reflected in the NodeList and vice versa.

        In this implementation, Nodes implement the NodeList interface and provide their own getChildNodes() support. Other DOMs may solve this differently.

        Specified by:
        getChildNodes in interface Node
        Overrides:
        getChildNodes in class NodeImpl

      • setNodeValueInternal

        protected void setNodeValueInternal​(String value)
        Convenience wrapper for calling setNodeValueInternal when we are not performing a replacement operation
        Parameters:
        value - the value

      • setNodeValueInternal

        protected void setNodeValueInternal​(String value,
                                    boolean replace)
        This function added so that we can distinguish whether setNodeValue has been called from some other DOM functions. or by the client.

        This is important, because we do one type of Range fix-up, from the high-level functions in CharacterData, and another type if the client simply calls setNodeValue(value).

        Parameters:
        value - the value
        replace - flag to signal replace

      • setNodeValue

        public void setNodeValue​(String value)
        Sets the node value. Sets the content, possibly firing related events, and updating ranges (via notification to the document)
        Specified by:
        setNodeValue in interface Node
        Overrides:
        setNodeValue in class NodeImpl

      • getData

        public String getData()
        Returns:
        character data currently stored in this node.

      • getLength

        public int getLength()
        NodeList method: Count the immediate children of this node

        By default we do not have any children, ParentNode overrides this. Report number of characters currently stored in this node's data. It may be 0, meaning that the value is an empty string.

        Specified by:
        getLength in interface NodeList
        Overrides:
        getLength in class NodeImpl

      • appendData

        public void appendData​(String data)
        Concatenate additional characters onto the end of the data stored in this node. Note that this, and insert(), are the paths by which a DOM could wind up accumulating more data than the language's strings can easily handle. (See above discussion.)
        Parameters:
        data - the data

      • deleteData

        public void deleteData​(int offset,
                       int count)
                throws DOMException
        Remove a range of characters from the node's value. Throws a DOMException if the offset is beyond the end of the string. However, a deletion _count_ that exceeds the available data is accepted as a delete-to-end request.
        Parameters:
        offset - the offser
        count - the count
        Throws:
        DOMException - INDEX_SIZE_ERR if offset is negative or greater than length, or if count is negative.

      • insertData

        public void insertData​(int offset,
                       String data)
                throws DOMException
        Insert additional characters into the data stored in this node, at the offset specified.
        Parameters:
        offset - the offset
        data - the data
        Throws:
        DOMException - INDEX_SIZE_ERR if offset is negative or greater than length.

      • replaceData

        public void replaceData​(int offset,
                        int count,
                        String data)
                 throws DOMException
        Replace a series of characters at the specified (zero-based) offset with a new string, NOT necessarily of the same length. Convenience method, equivalent to a delete followed by an insert. Throws a DOMException if the specified offset is beyond the end of the existing data.
        Parameters:
        offset - The offset at which to begin replacing.
        count - The number of characters to remove, interpreted as in the delete() method.
        data - The new string to be inserted at offset in place of the removed data. Note that the entire string will be inserted -- the count parameter does not affect insertion, and the new data may be longer or shorter than the substring it replaces.
        Throws:
        DOMException - INDEX_SIZE_ERR if offset is negative or greater than length, or if count is negative.

      • setData

        public void setData​(String value)
             throws DOMException
        Store character data into this node.
        Parameters:
        value - the value
        Throws:
        DOMException

      • substringData

        public String substringData​(int offset,
                            int count)
                     throws DOMException
        Substring is more than a convenience function. In some implementations of the DOM, where the stored data may exceed the length that can be returned in a single string, the only way to read it all is to extract it in chunks via this method.
        Parameters:
        offset - Zero-based offset of first character to retrieve.
        count - Number of characters to retrieve.

        If the sum of offset and count exceeds the length, all characters to end of data are returned.

        Returns:
        the substring
        Throws:
        DOMException - INDEX_SIZE_ERR if offset is negative or greater than length, or if count is negative.
        DOMException - WSTRING_SIZE_ERR In some implementations, count may exceed the permitted length of strings. If so, substring() will throw this DOMException advising the user to instead retrieve the data in smaller chunks.