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TGIshib
2016-08-14 14:58:51 +03:00
parent 9031597f49
commit 8fdced4e11
7 changed files with 187 additions and 102 deletions
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18
java/com/google/flatbuffers/FlatBufferBuilder.java
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@@ -375,7 +375,7 @@ public class FlatBufferBuilder {
*/
public int createVectorOfTables(int[] offsets) {
notNested();
startVector(4, offsets.length, 4);
startVector(Constants.SIZEOF_INT, offsets.length, Constants.SIZEOF_INT);
for(int i = offsets.length - 1; i >= 0; i--) addOffset(offsets[i]);
return endVector();
}
@@ -383,21 +383,13 @@ public class FlatBufferBuilder {
/**
* Create a vector of sorted by the key tables.
*
* @param type Type of the tables.
* @param obj Instance of the table class.
* @param offsets Offsets of the tables.
* @return Returns offset of the sorted vector.
*/
public <T> int createSortedTableVector(Class<T> type, int[] offsets) {
try{
return (int)type.getMethod("createMySortedTableVector", FlatBufferBuilder.class, ByteBuffer.class, int[].class).invoke(null, this, bb, offsets);
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (Exception e){
e.printStackTrace();
}
return 0;
public <T extends Table> int createSortedTableVector(T obj, int[] offsets) {
obj.sortTables(offsets, bb);
return createVectorOfTables(offsets);
}
/**

65
java/com/google/flatbuffers/Table.java
View File

@@ -56,11 +56,14 @@ public class Table {
* @param vtable_offset An `int` offset to the vtable in the Table's ByteBuffer.
* @return Returns an offset into the object, or `0` if the field is not present.
*/
protected int __offset(int vtable_offset) { return __offset(vtable_offset, bb_pos - bb.getInt(bb_pos), bb, false); }
protected int __offset(int vtable_offset) {
int vtable = bb_pos - bb.getInt(bb_pos);
return vtable_offset < bb.getShort(vtable) ? bb.getShort(vtable + vtable_offset) : 0;
}
protected static int __offset(int vtable_offset, int vtable, ByteBuffer _bb, boolean invoked_static) {
if (!invoked_static) return vtable_offset < _bb.getShort(vtable) ? _bb.getShort(vtable + vtable_offset) : 0;
else return _bb.getShort(vtable + vtable_offset - _bb.getInt(vtable)) + vtable;
protected static int __offset(int vtable_offset, int offset, ByteBuffer bb) {
int vtable = bb.array().length - offset;
return bb.getShort(vtable + vtable_offset - bb.getInt(vtable)) + vtable;
}
/**
@@ -85,15 +88,11 @@ public class Table {
* @return Returns a `String` from the data stored inside the FlatBuffer at `offset`.
*/
protected String __string(int offset) {
return __string(offset, bb);
}
protected static String __string(int offset, ByteBuffer _bb) {
CharsetDecoder decoder = UTF8_DECODER.get();
decoder.reset();
offset += _bb.getInt(offset);
ByteBuffer src = _bb.duplicate().order(ByteOrder.LITTLE_ENDIAN);
offset += bb.getInt(offset);
ByteBuffer src = bb.duplicate().order(ByteOrder.LITTLE_ENDIAN);
int length = src.getInt(offset);
src.position(offset + SIZEOF_INT);
src.limit(offset + SIZEOF_INT + length);
@@ -194,6 +193,52 @@ public class Table {
}
return true;
}
/**
* Sort tables by the key.
*
* @param offsets An 'int' indexes of the tables into the _bb.
* @param bb A {@code ByteBuffer} to get the tables.
*/
protected void sortTables(int[] offsets, ByteBuffer bb) {
Integer[] off = new Integer[offsets.length];
for (int i = 0; i < offsets.length; i++) off[i] = offsets[i];
Arrays.sort(off, (Integer o1, Integer o2) -> keysCompare(o1, o2, bb));
for (int i = 0; i < offsets.length; i++) offsets[i] = off[i];
}
/**
* Compare two tables by the key.
*
* @param o1 An 'Integer' index of the first key into the _bb.
* @param o2 An 'Integer' index of the second key into the _bb.
* @param bb A {@code ByteBuffer} to get the keys.
*/
protected int keysCompare(Integer o1, Integer o2, ByteBuffer bb) { return 0; }
/**
* Compare two strings in the buffer.
*
* @param offset_1 An 'int' index of the first string into the bb.
* @param offset_2 An 'int' index of the second string into the bb.
* @param bb A {@code ByteBuffer} to get the strings.
*/
protected static int compareStrings(int offset_1, int offset_2, ByteBuffer bb) {
offset_1 += bb.getInt(offset_1);
offset_2 += bb.getInt(offset_2);
int len_1 = bb.getInt(offset_1);
int len_2 = bb.getInt(offset_2);
int startPos_1 = offset_1 + SIZEOF_INT;
int startPos_2 = offset_2 + SIZEOF_INT;
int len = Math.min(len_1, len_2);
for(int i = 0; i < len; i++) {
if (bb.array()[i + startPos_1] != bb.array()[i + startPos_2])
return bb.array()[i + startPos_1] - bb.array()[i + startPos_2];
}
if (len_1 < len_2) return -1;
if (len_1 > len_2) return 1;
return 0;
}
}
/// @endcond