Package com.google.gwt.json.client

Class JSONObject

java.lang.Object
com.google.gwt.json.client.JSONValue
com.google.gwt.json.client.JSONObject
public class JSONObject extends JSONValue
Represents a JSON object. A JSON object consists of a set of properties.

  • Constructor Details

    • JSONObject

      public JSONObject()

    • JSONObject

      public JSONObject(JavaScriptObject jsValue)
      Creates a new JSONObject from the supplied JavaScript value.

  • Method Details

    • containsKey

      public boolean containsKey(String key)
      Tests whether or not this JSONObject contains the specified property.
      Parameters:
      key - the property to search for
      Returns:
      true if the JSONObject contains the specified property

    • equals

      public boolean equals(Object other)
      Returns true if other is a JSONObject wrapping the same underlying object.
      Overrides:
      equals in class Object

    • get

      public JSONValue get(String key)
      Gets the JSONValue associated with the specified property.
      Parameters:
      key - the property to access
      Returns:
      the value of the specified property, or null if the property does not exist
      Throws:
      NullPointerException - if key is null

    • getJavaScriptObject

      public JavaScriptObject getJavaScriptObject()
      Returns the underlying JavaScript object that this object wraps.

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • isObject

      public JSONObject isObject()
      Returns this, as this is a JSONObject.
      Overrides:
      isObject in class JSONValue
      Returns:
      a reference to a JSONObject if this JSONValue is a JSONObject or null otherwise.

    • keySet

      public Set<String> keySet()
      Returns the set of properties defined on this JSONObject. The returned set is immutable.

    • put

      public JSONValue put(String key, JSONValue jsonValue)
      Assign the specified property to the specified value in this JSONObject. If the property already has an associated value, it is overwritten.
      Parameters:
      key - the property to assign
      jsonValue - the value to assign
      Returns:
      the previous value of the property, or null if the property did not exist
      Throws:
      NullPointerException - if key is null

    • size

      public int size()
      Determines the number of properties on this object.

    • toString

      public String toString()
      Converts a JSONObject into a JSON representation that can be used to communicate with a JSON service.
      Specified by:
      toString in class JSONValue
      Returns:
      a JSON string representation of this JSONObject instance

    • getUnwrapper

      JavaScriptObject getUnwrapper()
      Description copied from class: JSONValue
      Internal. Returns a JS func that can unwrap this value. Used from native code.
      Specified by:
      getUnwrapper in class JSONValue