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[Java] Fix key lookup returning null clashing with default value (#7236)

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A field with key attribute must always be written on the message so it
can be looked up by key. There is a edge case where inserting a key
field with same value as default would prevent it to be written on
the message and later cannot be found when searched by key.
This commit is contained in:
Paulo Pinheiro
2022-04-12 02:16:41 +02:00
committed by GitHub
parent 7f663b1204
commit 7181d77700
9 changed files with 186 additions and 11 deletions
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75
tests/DictionaryLookup/LongFloatEntry.java Normal file
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@@ -0,0 +1,75 @@
// automatically generated by the FlatBuffers compiler, do not modify
package DictionaryLookup;
import java.nio.*;
import java.lang.*;
import java.util.*;
import com.google.flatbuffers.*;
@SuppressWarnings("unused")
public final class LongFloatEntry extends Table {
public static void ValidateVersion() { Constants.FLATBUFFERS_2_0_0(); }
public static LongFloatEntry getRootAsLongFloatEntry(ByteBuffer _bb) { return getRootAsLongFloatEntry(_bb, new LongFloatEntry()); }
public static LongFloatEntry getRootAsLongFloatEntry(ByteBuffer _bb, LongFloatEntry obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }
public void __init(int _i, ByteBuffer _bb) { __reset(_i, _bb); }
public LongFloatEntry __assign(int _i, ByteBuffer _bb) { __init(_i, _bb); return this; }
public long key() { int o = __offset(4); return o != 0 ? bb.getLong(o + bb_pos) : 0L; }
public float value() { int o = __offset(6); return o != 0 ? bb.getFloat(o + bb_pos) : 0.0f; }
public static int createLongFloatEntry(FlatBufferBuilder builder,
long key,
float value) {
builder.startTable(2);
LongFloatEntry.addKey(builder, key);
LongFloatEntry.addValue(builder, value);
return LongFloatEntry.endLongFloatEntry(builder);
}
public static void startLongFloatEntry(FlatBufferBuilder builder) { builder.startTable(2); }
public static void addKey(FlatBufferBuilder builder, long key) { builder.addLong(key); builder.slot(0); }
public static void addValue(FlatBufferBuilder builder, float value) { builder.addFloat(1, value, 0.0f); }
public static int endLongFloatEntry(FlatBufferBuilder builder) {
int o = builder.endTable();
return o;
}
@Override
protected int keysCompare(Integer o1, Integer o2, ByteBuffer _bb) {
long val_1 = _bb.getLong(__offset(4, o1, _bb));
long val_2 = _bb.getLong(__offset(4, o2, _bb));
return val_1 > val_2 ? 1 : val_1 < val_2 ? -1 : 0;
}
public static LongFloatEntry __lookup_by_key(LongFloatEntry obj, int vectorLocation, long key, ByteBuffer bb) {
int span = bb.getInt(vectorLocation - 4);
int start = 0;
while (span != 0) {
int middle = span / 2;
int tableOffset = __indirect(vectorLocation + 4 * (start + middle), bb);
long val = bb.getLong(__offset(4, bb.capacity() - tableOffset, bb));
int comp = val > key ? 1 : val < key ? -1 : 0;
if (comp > 0) {
span = middle;
} else if (comp < 0) {
middle++;
start += middle;
span -= middle;
} else {
return (obj == null ? new LongFloatEntry() : obj).__assign(tableOffset, bb);
}
}
return null;
}
public static final class Vector extends BaseVector {
public Vector __assign(int _vector, int _element_size, ByteBuffer _bb) { __reset(_vector, _element_size, _bb); return this; }
public LongFloatEntry get(int j) { return get(new LongFloatEntry(), j); }
public LongFloatEntry get(LongFloatEntry obj, int j) { return obj.__assign(__indirect(__element(j), bb), bb); }
public LongFloatEntry getByKey(long key) { return __lookup_by_key(null, __vector(), key, bb); }
public LongFloatEntry getByKey(LongFloatEntry obj, long key) { return __lookup_by_key(obj, __vector(), key, bb); }
}
}