Package weka.core.json

Class JSONNode

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Cloneable, javax.swing.tree.MutableTreeNode, javax.swing.tree.TreeNode
    public class JSONNode
extends javax.swing.tree.DefaultMutableTreeNode
    Container class for storing a JSON data structure.
    Version:
    $Revision: 12111 $
    Author:
    FracPete (fracpete at waikato dot ac dot nz)
    See Also:
    Serialized Form

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description
      static class  JSONNode.NodeType
      The type of a node.

    • Field Summary

      • Fields inherited from class javax.swing.tree.DefaultMutableTreeNode

        EMPTY_ENUMERATION

    • Constructor Summary

      Constructors 
      Constructor Description
      JSONNode()
      Initializes the root container.
      JSONNode​(java.lang.String name, java.lang.Boolean value)
      Initializes the primitive container.
      JSONNode​(java.lang.String name, java.lang.Double value)
      Initializes the primitive container.
      JSONNode​(java.lang.String name, java.lang.Integer value)
      Initializes the primitive container.
      JSONNode​(java.lang.String name, java.lang.String value)
      Initializes the primitive container.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      JSONNode addArray​(java.lang.String name)
      Adds an array child to the object.
      JSONNode addArrayElement​(java.lang.Object value)
      Adds an array element child to the array.
      JSONNode addNull​(java.lang.String name)
      Adds a "null" child to the object.
      JSONNode addNullArrayElement()
      Adds a null array element child to the array.
      JSONNode addObject​(java.lang.String name)
      Adds an object child to the object.
      JSONNode addObjectArrayElement()
      Add a key-value object child into the array
      JSONNode addPrimitive​(java.lang.String name, java.lang.Boolean value)
      Adds a key-value child to the object.
      JSONNode addPrimitive​(java.lang.String name, java.lang.Double value)
      Adds a key-value child to the object.
      JSONNode addPrimitive​(java.lang.String name, java.lang.Integer value)
      Adds a key-value child to the object.
      JSONNode addPrimitive​(java.lang.String name, java.lang.String value)
      Adds a key-value child to the object.
      JSONNode getChild​(java.lang.String name)
      Returns the child with the given name.
      java.lang.String getName()
      Returns the name of the node.
      JSONNode.NodeType getNodeType()
      Returns the type of the container.
      java.lang.Object getValue()
      Returns the stored value.
      java.lang.Object getValue​(java.lang.Object defValue)
      Returns the stored value.
      boolean hasChild​(java.lang.String name)
      Checks whether the node has a child with the given name.
      boolean isAnonymous()
      Checks whether the node is anonymous.
      boolean isArray()
      Returns wether the node is an array.
      boolean isObject()
      Returns wether the node is an object.
      boolean isPrimitive()
      Returns whether the node stores a primitive value or a an array/object.
      static void main​(java.lang.String[] args)
      Only for testing.
      static JSONNode read​(java.io.Reader reader)
      Reads the JSON object from the given reader.
      java.lang.String toString()
      Returns a string representation of the node.
      void toString​(java.lang.StringBuffer buffer)
      Dumps the node structure into JSON format.

      • Methods inherited from class javax.swing.tree.DefaultMutableTreeNode

        add, breadthFirstEnumeration, children, clone, depthFirstEnumeration, getAllowsChildren, getChildAfter, getChildAt, getChildBefore, getChildCount, getDepth, getFirstChild, getFirstLeaf, getIndex, getLastChild, getLastLeaf, getLeafCount, getLevel, getNextLeaf, getNextNode, getNextSibling, getParent, getPath, getPreviousLeaf, getPreviousNode, getPreviousSibling, getRoot, getSharedAncestor, getSiblingCount, getUserObject, getUserObjectPath, insert, isLeaf, isNodeAncestor, isNodeChild, isNodeDescendant, isNodeRelated, isNodeSibling, isRoot, pathFromAncestorEnumeration, postorderEnumeration, preorderEnumeration, remove, remove, removeAllChildren, removeFromParent, setAllowsChildren, setParent, setUserObject

      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Constructor Detail

      • JSONNode

        public JSONNode()
        Initializes the root container.

      • JSONNode

        public JSONNode​(java.lang.String name,
                java.lang.Boolean value)
        Initializes the primitive container.
        Parameters:
        name - the name
        value - the primitive value

      • JSONNode

        public JSONNode​(java.lang.String name,
                java.lang.Integer value)
        Initializes the primitive container.
        Parameters:
        name - the name
        value - the primitive value

      • JSONNode

        public JSONNode​(java.lang.String name,
                java.lang.Double value)
        Initializes the primitive container.
        Parameters:
        name - the name
        value - the primitive value

      • JSONNode

        public JSONNode​(java.lang.String name,
                java.lang.String value)
        Initializes the primitive container.
        Parameters:
        name - the name
        value - the primitive value

    • Method Detail

      • isAnonymous

        public boolean isAnonymous()
        Checks whether the node is anonymous.
        Returns:
        true if no name available

      • getName

        public java.lang.String getName()
        Returns the name of the node.
        Returns:
        the name, null for anonymous nodes

      • getValue

        public java.lang.Object getValue()
        Returns the stored value.
        Returns:
        the stored value, can be null

      • getValue

        public java.lang.Object getValue​(java.lang.Object defValue)
        Returns the stored value.
        Parameters:
        defValue - the default value, if value is null
        Returns:
        the stored value, can be null

      • isPrimitive

        public boolean isPrimitive()
        Returns whether the node stores a primitive value or a an array/object.
        Returns:
        true if a primitive, false in case of an array/object

      • isArray

        public boolean isArray()
        Returns wether the node is an array.
        Returns:
        true if the node is array container

      • isObject

        public boolean isObject()
        Returns wether the node is an object.
        Returns:
        true if the node is object container

      • getNodeType

        public JSONNode.NodeType getNodeType()
        Returns the type of the container.
        Returns:
        the type

      • addNull

        public JSONNode addNull​(java.lang.String name)
        Adds a "null" child to the object.
        Parameters:
        name - the name of the null value
        Returns:
        the new node, or null if none added

      • addPrimitive

        public JSONNode addPrimitive​(java.lang.String name,
                             java.lang.Boolean value)
        Adds a key-value child to the object.
        Parameters:
        name - the name of the pair
        value - the value
        Returns:
        the new node, or null if none added

      • addPrimitive

        public JSONNode addPrimitive​(java.lang.String name,
                             java.lang.Integer value)
        Adds a key-value child to the object.
        Parameters:
        name - the name of the pair
        value - the value
        Returns:
        the new node, or null if none added

      • addPrimitive

        public JSONNode addPrimitive​(java.lang.String name,
                             java.lang.Double value)
        Adds a key-value child to the object.
        Parameters:
        name - the name of the pair
        value - the value
        Returns:
        the new node, or null if none added

      • addPrimitive

        public JSONNode addPrimitive​(java.lang.String name,
                             java.lang.String value)
        Adds a key-value child to the object.
        Parameters:
        name - the name of the pair
        value - the value
        Returns:
        the new node, or null if none added

      • addArray

        public JSONNode addArray​(java.lang.String name)
        Adds an array child to the object.
        Parameters:
        name - the name of the pair
        Returns:
        the new node, or null if none added

      • addNullArrayElement

        public JSONNode addNullArrayElement()
        Adds a null array element child to the array.
        Returns:
        the new node, or null if none added

      • addObjectArrayElement

        public JSONNode addObjectArrayElement()
        Add a key-value object child into the array
        Returns:
        the newly added node

      • addArrayElement

        public JSONNode addArrayElement​(java.lang.Object value)
        Adds an array element child to the array.
        Parameters:
        value - the value of the element array
        Returns:
        the new node, or null if none added

      • addObject

        public JSONNode addObject​(java.lang.String name)
        Adds an object child to the object.
        Parameters:
        name - the name of the pair
        Returns:
        the new node, or null if none added

      • hasChild

        public boolean hasChild​(java.lang.String name)
        Checks whether the node has a child with the given name.
        Parameters:
        name - the name of the child
        Returns:
        true if child with that name is available

      • getChild

        public JSONNode getChild​(java.lang.String name)
        Returns the child with the given name.
        Parameters:
        name - the name of the child
        Returns:
        the child if available, null otherwise

      • toString

        public void toString​(java.lang.StringBuffer buffer)
        Dumps the node structure into JSON format.
        Parameters:
        buffer - the buffer to add the data to

      • toString

        public java.lang.String toString()
        Returns a string representation of the node.
        Overrides:
        toString in class javax.swing.tree.DefaultMutableTreeNode
        Returns:
        the string representation

      • read

        public static JSONNode read​(java.io.Reader reader)
                     throws java.lang.Exception
        Reads the JSON object from the given reader.
        Parameters:
        reader - the reader to read the JSON object from
        Returns:
        the generated JSON object
        Throws:
        java.lang.Exception - if parsing fails

      • main

        public static void main​(java.lang.String[] args)
                 throws java.lang.Exception
        Only for testing. Generates a simple JSON object and displays it.
        Parameters:
        args - ignored
        Throws:
        java.lang.Exception - if something goes wrong