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Java: Calculation of vtable and vtable size moved to the __init method. (#5210)

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vtable and vtable size depends only on `Table#bb_pos` but calculated in
`Table#_offset` method on each field lookup.
Doing this with every call of `Table#__offset` is redundant.

These values can be read once with change of `Table#bb_pos` and reused
for any field lookup.
This commit is contained in:
Kulikov Alexey
2019-02-26 05:45:29 +07:00
committed by Wouter van Oortmerssen
parent dc61512f20
commit 4e5152d886
20 changed files with 39 additions and 19 deletions
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3
tests/union_vector/Attacker.java
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@@ -9,10 +9,11 @@ import com.google.flatbuffers.*;
public final class Attacker extends Table {
public static Attacker getRootAsAttacker(ByteBuffer _bb) { return getRootAsAttacker(_bb, new Attacker()); }
public static Attacker getRootAsAttacker(ByteBuffer _bb, Attacker obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }
public void __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; }
public void __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; vtable_start = bb_pos - bb.getInt(bb_pos); vtable_size = bb.getShort(vtable_start); }
public Attacker __assign(int _i, ByteBuffer _bb) { __init(_i, _bb); return this; }
public int swordAttackDamage() { int o = __offset(4); return o != 0 ? bb.getInt(o + bb_pos) : 0; }
public boolean mutateSwordAttackDamage(int sword_attack_damage) { int o = __offset(4); if (o != 0) { bb.putInt(o + bb_pos, sword_attack_damage); return true; } else { return false; } }
public static int createAttacker(FlatBufferBuilder builder,
int sword_attack_damage) {

1
tests/union_vector/BookReader.java
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@@ -11,6 +11,7 @@ public final class BookReader extends Struct {
public BookReader __assign(int _i, ByteBuffer _bb) { __init(_i, _bb); return this; }
public int booksRead() { return bb.getInt(bb_pos + 0); }
public void mutateBooksRead(int books_read) { bb.putInt(bb_pos + 0, books_read); }
public static int createBookReader(FlatBufferBuilder builder, int booksRead) {
builder.prep(4, 4);

4
tests/union_vector/Movie.java
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@@ -10,15 +10,17 @@ public final class Movie extends Table {
public static Movie getRootAsMovie(ByteBuffer _bb) { return getRootAsMovie(_bb, new Movie()); }
public static Movie getRootAsMovie(ByteBuffer _bb, Movie obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }
public static boolean MovieBufferHasIdentifier(ByteBuffer _bb) { return __has_identifier(_bb, "MOVI"); }
public void __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; }
public void __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; vtable_start = bb_pos - bb.getInt(bb_pos); vtable_size = bb.getShort(vtable_start); }
public Movie __assign(int _i, ByteBuffer _bb) { __init(_i, _bb); return this; }
public byte mainCharacterType() { int o = __offset(4); return o != 0 ? bb.get(o + bb_pos) : 0; }
public boolean mutateMainCharacterType(byte main_character_type) { int o = __offset(4); if (o != 0) { bb.put(o + bb_pos, main_character_type); return true; } else { return false; } }
public Table mainCharacter(Table obj) { int o = __offset(6); return o != 0 ? __union(obj, o) : null; }
public byte charactersType(int j) { int o = __offset(8); return o != 0 ? bb.get(__vector(o) + j * 1) : 0; }
public int charactersTypeLength() { int o = __offset(8); return o != 0 ? __vector_len(o) : 0; }
public ByteBuffer charactersTypeAsByteBuffer() { return __vector_as_bytebuffer(8, 1); }
public ByteBuffer charactersTypeInByteBuffer(ByteBuffer _bb) { return __vector_in_bytebuffer(_bb, 8, 1); }
public boolean mutateCharactersType(int j, byte characters_type) { int o = __offset(8); if (o != 0) { bb.put(__vector(o) + j * 1, characters_type); return true; } else { return false; } }
public Table characters(Table obj, int j) { int o = __offset(10); return o != 0 ? __union(obj, __vector(o) + j * 4 - bb_pos) : null; }
public int charactersLength() { int o = __offset(10); return o != 0 ? __vector_len(o) : 0; }

1
tests/union_vector/Rapunzel.java
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@@ -11,6 +11,7 @@ public final class Rapunzel extends Struct {
public Rapunzel __assign(int _i, ByteBuffer _bb) { __init(_i, _bb); return this; }
public int hairLength() { return bb.getInt(bb_pos + 0); }
public void mutateHairLength(int hair_length) { bb.putInt(bb_pos + 0, hair_length); }
public static int createRapunzel(FlatBufferBuilder builder, int hairLength) {
builder.prep(4, 4);