Package edu.wpi.first.util.struct

Class StructBuffer<T>

java.lang.Object
edu.wpi.first.util.struct.StructBuffer<T>
Type Parameters:
T - Object type.
public final class StructBuffer<T>
extends Object
Reusable buffer for serialization/deserialization to/from a raw struct.

  • Method Summary

    Modifier and Type Method Description
    static <T> StructBuffer<T> create​(Struct<T> struct)
    Returns a StructBuffer for the given struct.
    Struct<T> getStruct()
    Gets the struct object of the stored type.
    String getTypeString()
    Gets the type string.
    T read​(byte[] buf)
    Deserializes a value from a byte array, creating a new object.
    T read​(byte[] buf, int start, int len)
    Deserializes a value from a byte array, creating a new object.
    T read​(ByteBuffer buf)
    Deserializes a value from a ByteBuffer, creating a new object.
    T[] readArray​(byte[] buf)
    Deserializes an array of values from a byte array, creating an array of new objects.
    T[] readArray​(byte[] buf, int start, int len)
    Deserializes an array of values from a byte array, creating an array of new objects.
    T[] readArray​(ByteBuffer buf)
    Deserializes an array of values from a ByteBuffer, creating an array of new objects.
    void readInto​(T out, byte[] buf)
    Deserializes a value from a byte array into a mutable object.
    void readInto​(T out, byte[] buf, int start, int len)
    Deserializes a value from a byte array into a mutable object.
    void readInto​(T out, ByteBuffer buf)
    Deserializes a value from a ByteBuffer into a mutable object.
    void reserve​(int nelem)
    Ensures sufficient buffer space is available for the given number of elements.
    ByteBuffer write​(T value)
    Serializes a value to a ByteBuffer.
    ByteBuffer writeArray​(Collection<T> values)
    Serializes a collection of values to a ByteBuffer.
    ByteBuffer writeArray​(T[] values)
    Serializes an array of values to a ByteBuffer.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Method Details

    • create

      public static <T> StructBuffer<T> create​(Struct<T> struct)
      Returns a StructBuffer for the given struct.
      Type Parameters:
      T - Object type.
      Parameters:
      struct - A struct.
      Returns:
      A StructBuffer for the given struct.

    • getStruct

      public Struct<T> getStruct()
      Gets the struct object of the stored type.
      Returns:
      struct object

    • getTypeString

      public String getTypeString()
      Gets the type string.
      Returns:
      type string

    • reserve

      public void reserve​(int nelem)
      Ensures sufficient buffer space is available for the given number of elements.
      Parameters:
      nelem - number of elements

    • write

      public ByteBuffer write​(T value)
      Serializes a value to a ByteBuffer. The returned ByteBuffer is a direct byte buffer with the position set to the end of the serialized data.
      Parameters:
      value - value
      Returns:
      byte buffer

    • read

      public T read​(byte[] buf, int start, int len)
      Deserializes a value from a byte array, creating a new object.
      Parameters:
      buf - byte array
      start - starting location within byte array
      len - length of serialized data
      Returns:
      new object

    • read

      public T read​(byte[] buf)
      Deserializes a value from a byte array, creating a new object.
      Parameters:
      buf - byte array
      Returns:
      new object

    • read

      public T read​(ByteBuffer buf)
      Deserializes a value from a ByteBuffer, creating a new object.
      Parameters:
      buf - byte buffer
      Returns:
      new object

    • readInto

      public void readInto​(T out, byte[] buf, int start, int len)
      Deserializes a value from a byte array into a mutable object.
      Parameters:
      out - object (will be updated with deserialized contents)
      buf - byte array
      start - starting location within byte array
      len - length of serialized data
      Throws:
      UnsupportedOperationException - if T is immutable

    • readInto

      public void readInto​(T out, byte[] buf)
      Deserializes a value from a byte array into a mutable object.
      Parameters:
      out - object (will be updated with deserialized contents)
      buf - byte array
      Throws:
      UnsupportedOperationException - if T is immutable

    • readInto

      public void readInto​(T out, ByteBuffer buf)
      Deserializes a value from a ByteBuffer into a mutable object.
      Parameters:
      out - object (will be updated with deserialized contents)
      buf - byte buffer
      Throws:
      UnsupportedOperationException - if T is immutable

    • writeArray

      public ByteBuffer writeArray​(Collection<T> values)
      Serializes a collection of values to a ByteBuffer. The returned ByteBuffer is a direct byte buffer with the position set to the end of the serialized data.
      Parameters:
      values - values
      Returns:
      byte buffer

    • writeArray

      public ByteBuffer writeArray​(T[] values)
      Serializes an array of values to a ByteBuffer. The returned ByteBuffer is a direct byte buffer with the position set to the end of the serialized data.
      Parameters:
      values - values
      Returns:
      byte buffer

    • readArray

      public T[] readArray​(byte[] buf, int start, int len)
      Deserializes an array of values from a byte array, creating an array of new objects.
      Parameters:
      buf - byte array
      start - starting location within byte array
      len - length of serialized data
      Returns:
      new object array

    • readArray

      public T[] readArray​(byte[] buf)
      Deserializes an array of values from a byte array, creating an array of new objects.
      Parameters:
      buf - byte array
      Returns:
      new object array

    • readArray

      public T[] readArray​(ByteBuffer buf)
      Deserializes an array of values from a ByteBuffer, creating an array of new objects.
      Parameters:
      buf - byte buffer
      Returns:
      new object array