com.fasterxml.jackson.core

Class JsonStreamContext

  • Direct Known Subclasses:
    JsonReadContext, JsonWriteContext

    public abstract class JsonStreamContext
extends Object
    Shared base class for streaming processing contexts used during reading and writing of Json content using Streaming API. This context is also exposed to applications: context object can be used by applications to get an idea of relative position of the parser/generator within json content being processed. This allows for some contextual processing: for example, output within Array context can differ from that of Object context.

    • Field Summary

      Fields 
      Modifier and Type Field and Description
      protected int _index
      Index of the currently processed entry.
      protected int _type 
      protected static int TYPE_ARRAY 
      protected static int TYPE_OBJECT 
      protected static int TYPE_ROOT 

    • Constructor Summary

      Constructors 
      Modifier Constructor and Description
      protected JsonStreamContext() 

    • Method Summary

      Methods 
      Modifier and Type Method and Description
      int getCurrentIndex() 
      abstract String getCurrentName()
      Method for accessing name associated with the current location.
      int getEntryCount() 
      abstract JsonStreamContext getParent()
      Accessor for finding parent context of this context; will return null for root context.
      String getTypeDesc()
      Method for accessing simple type description of current context; either ROOT (for root-level values), OBJECT (for field names and values of JSON Objects) or ARRAY (for values of JSON Arrays)
      boolean inArray()
      Method that returns true if this context is an Array context; that is, content is being read from or written to a Json Array.
      boolean inObject()
      Method that returns true if this context is an Object context; that is, content is being read from or written to a Json Object.
      boolean inRoot()
      Method that returns true if this context is a Root context; that is, content is being read from or written to without enclosing array or object structure.

    • Field Detail

      • _type

        protected int _type

      • _index

        protected int _index
        Index of the currently processed entry. Starts with -1 to signal that no entries have been started, and gets advanced each time a new entry is started, either by encountering an expected separator, or with new values if no separators are expected (the case for root context).

    • Constructor Detail

      • JsonStreamContext

        protected JsonStreamContext()

    • Method Detail

      • getParent

        public abstract JsonStreamContext getParent()
        Accessor for finding parent context of this context; will return null for root context.

      • inArray

        public final boolean inArray()
        Method that returns true if this context is an Array context; that is, content is being read from or written to a Json Array.

      • inRoot

        public final boolean inRoot()
        Method that returns true if this context is a Root context; that is, content is being read from or written to without enclosing array or object structure.

      • inObject

        public final boolean inObject()
        Method that returns true if this context is an Object context; that is, content is being read from or written to a Json Object.

      • getTypeDesc

        public final String getTypeDesc()
        Method for accessing simple type description of current context; either ROOT (for root-level values), OBJECT (for field names and values of JSON Objects) or ARRAY (for values of JSON Arrays)

      • getEntryCount

        public final int getEntryCount()
        Returns:
        Number of entries that are complete and started.

      • getCurrentIndex

        public final int getCurrentIndex()
        Returns:
        Index of the currently processed entry, if any

      • getCurrentName

        public abstract String getCurrentName()
        Method for accessing name associated with the current location. Non-null for FIELD_NAME and value events that directly follow field names; null for root level and array values.

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