Lazily load this {@link Field}. This means the {@link Field} is valid, but it may not actually contain its data until invoked. {@link Document#GetField(String)} SHOULD NOT BE USED. {@link Document#GetFieldable(String)} is safe to use and should return a valid instance of a {@link Fieldable}.

{@link Document#Add(Fieldable)} should be called by the Reader.

Load this {@link Field} every time the {@link Document} is loaded, reading in the data as it is encountered. {@link Document#GetField(String)} and {@link Document#GetFieldable(String)} should not return null.

{@link Document#Add(Fieldable)} should be called by the Reader.

Load this field as in the {@link #LOAD} case, but immediately return from {@link Field} loading for the {@link Document}. Thus, the Document may not have its complete set of Fields. {@link Document#GetField(String)} and {@link Document#GetFieldable(String)} should both be valid for this {@link Field}

{@link Document#Add(Fieldable)} should be called by the Reader.

Behaves much like {@link #LOAD} but does not uncompress any compressed data. This is used for internal purposes. {@link Document#GetField(String)} and {@link Document#GetFieldable(String)} should not return null.

{@link Document#Add(Fieldable)} should be called by the Reader.

Do not load the {@link Field}. {@link Document#GetField(String)} and {@link Document#GetFieldable(String)} should return null. {@link Document#Add(Fieldable)} is not called.

{@link Document#Add(Fieldable)} should not be called by the Reader.

Expert: Load the size of this {@link Field} rather than its value. Size is measured as number of bytes required to store the field == bytes for a binary or any compressed value, and 2*chars for a String value. The size is stored as a binary value, represented as an int in a byte[], with the higher order byte first in [0]

Expert: Like {@link #SIZE} but immediately break from the field loading loop, i.e., stop loading further fields, after the size is loaded