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165 lines (143 loc) · 4.44 KB
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/*
* Copyright (c) 2004, 2005, 2006 TADA AB - Taby Sweden
* Copyright (c) 2010, 2011 PostgreSQL Global Development Group
*
* Distributed under the terms shown in the file COPYRIGHT
* found in the root folder of this project or at
* http://wiki.tada.se/index.php?title=PLJava_License
*
* @author Thomas Hallgren
*/
#include "pljava/type/Type_priv.h"
#include "pljava/type/Array.h"
#include "pljava/Invocation.h"
static TypeClass s_intClass;
static jclass s_Integer_class;
static jclass s_IntegerArray_class;
static jmethodID s_Integer_init;
static jmethodID s_Integer_intValue;
/*
* int primitive type.
*/
static Datum _int_invoke(Type self, jclass cls, jmethodID method, jvalue* args, PG_FUNCTION_ARGS)
{
jint iv = JNI_callStaticIntMethodA(cls, method, args);
return Int32GetDatum(iv);
}
static jvalue _int_coerceDatum(Type self, Datum arg)
{
jvalue result;
result.i = DatumGetInt32(arg);
return result;
}
static jvalue _intArray_coerceDatum(Type self, Datum arg)
{
jvalue result;
ArrayType* v = DatumGetArrayTypeP(arg);
jsize nElems = (jsize)ArrayGetNItems(ARR_NDIM(v), ARR_DIMS(v));
jintArray intArray = JNI_newIntArray(nElems);
#if (PGSQL_MAJOR_VER == 8 && PGSQL_MINOR_VER < 2)
JNI_setIntArrayRegion(intArray, 0, nElems, (jint*)ARR_DATA_PTR(v));
#else
if(ARR_HASNULL(v))
{
jsize idx;
jboolean isCopy = JNI_FALSE;
bits8* nullBitMap = ARR_NULLBITMAP(v);
jint* values = (jint*)ARR_DATA_PTR(v);
jint* elems = JNI_getIntArrayElements(intArray, &isCopy);
for(idx = 0; idx < nElems; ++idx)
{
if(arrayIsNull(nullBitMap, idx))
elems[idx] = 0;
else
elems[idx] = *values++;
}
JNI_releaseIntArrayElements(intArray, elems, JNI_COMMIT);
}
else
JNI_setIntArrayRegion(intArray, 0, nElems, (jint*)ARR_DATA_PTR(v));
#endif
result.l = (jobject)intArray;
return result;
}
static Datum _intArray_coerceObject(Type self, jobject intArray)
{
ArrayType* v;
jsize nElems;
if(intArray == 0)
return 0;
nElems = JNI_getArrayLength((jarray)intArray);
#if (PGSQL_MAJOR_VER == 8 && PGSQL_MINOR_VER < 2)
v = createArrayType(nElems, sizeof(jint), INT4OID);
#else
v = createArrayType(nElems, sizeof(jint), INT4OID, false);
#endif
if(!JNI_isInstanceOf( intArray, s_IntegerArray_class))
JNI_getIntArrayRegion((jintArray)intArray, 0, nElems, (jint*)ARR_DATA_PTR(v));
else
{
int idx = 0;
jint *array = (jint*)ARR_DATA_PTR(v);
for(idx = 0; idx < nElems; ++idx)
{
array[idx] = JNI_callIntMethod(JNI_getObjectArrayElement(intArray, idx),
s_Integer_intValue);
}
}
PG_RETURN_ARRAYTYPE_P(v);
}
/*
* java.lang.Integer type.
*/
static bool _Integer_canReplace(Type self, Type other)
{
TypeClass cls = Type_getClass(other);
return Type_getClass(self) == cls || cls == s_intClass;
}
static jvalue _Integer_coerceDatum(Type self, Datum arg)
{
jvalue result;
result.l = JNI_newObject(s_Integer_class, s_Integer_init, DatumGetInt32(arg));
return result;
}
static Datum _Integer_coerceObject(Type self, jobject intObj)
{
return Int32GetDatum(intObj == 0 ? 0 : JNI_callIntMethod(intObj, s_Integer_intValue));
}
static Type _int_createArrayType(Type self, Oid arrayTypeId)
{
return Array_fromOid2(arrayTypeId, self, _intArray_coerceDatum, _intArray_coerceObject);
}
/* Make this datatype available to the postgres system.
*/
extern void Integer_initialize(void);
void Integer_initialize(void)
{
Type t_int;
Type t_Integer;
TypeClass cls;
s_Integer_class = JNI_newGlobalRef(PgObject_getJavaClass("java/lang/Integer"));
s_IntegerArray_class = JNI_newGlobalRef(PgObject_getJavaClass("[Ljava/lang/Integer;"));
s_Integer_init = PgObject_getJavaMethod(s_Integer_class, "<init>", "(I)V");
s_Integer_intValue = PgObject_getJavaMethod(s_Integer_class, "intValue", "()I");
cls = TypeClass_alloc("type.Integer");
cls->canReplaceType = _Integer_canReplace;
cls->JNISignature = "Ljava/lang/Integer;";
cls->javaTypeName = "java.lang.Integer";
cls->coerceDatum = _Integer_coerceDatum;
cls->coerceObject = _Integer_coerceObject;
t_Integer = TypeClass_allocInstance(cls, INT4OID);
cls = TypeClass_alloc("type.int");
cls->JNISignature = "I";
cls->javaTypeName = "int";
cls->invoke = _int_invoke;
cls->coerceDatum = _int_coerceDatum;
cls->coerceObject = _Integer_coerceObject;
cls->createArrayType = _int_createArrayType;
s_intClass = cls;
t_int = TypeClass_allocInstance(cls, INT4OID);
t_int->objectType = t_Integer;
Type_registerType("int", t_int);
Type_registerType("java.lang.Integer", t_Integer);
}