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171 lines (150 loc) · 4.73 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_doubleClass;
static jclass s_Double_class;
static jclass s_DoubleArray_class;
static jmethodID s_Double_init;
static jmethodID s_Double_doubleValue;
/*
* double primitive type.
*/
static Datum _asDatum(jdouble v)
{
MemoryContext currCtx = Invocation_switchToUpperContext();
Datum ret = Float8GetDatum(v);
MemoryContextSwitchTo(currCtx);
return ret;
}
static Datum _double_invoke(Type self, jclass cls, jmethodID method, jvalue* args, PG_FUNCTION_ARGS)
{
return _asDatum(JNI_callStaticDoubleMethodA(cls, method, args));
}
static jvalue _double_coerceDatum(Type self, Datum arg)
{
jvalue result;
result.d = DatumGetFloat8(arg);
return result;
}
static jvalue _doubleArray_coerceDatum(Type self, Datum arg)
{
jvalue result;
ArrayType* v = DatumGetArrayTypeP(arg);
jsize nElems = (jsize)ArrayGetNItems(ARR_NDIM(v), ARR_DIMS(v));
jdoubleArray doubleArray = JNI_newDoubleArray(nElems);
#if (PGSQL_MAJOR_VER == 8 && PGSQL_MINOR_VER < 2)
JNI_setDoubleArrayRegion(doubleArray, 0, nElems, (jdouble*)ARR_DATA_PTR(v));
#else
if(ARR_HASNULL(v))
{
jsize idx;
jboolean isCopy = JNI_FALSE;
bits8* nullBitMap = ARR_NULLBITMAP(v);
jdouble* values = (jdouble*)ARR_DATA_PTR(v);
jdouble* elems = JNI_getDoubleArrayElements(doubleArray, &isCopy);
for(idx = 0; idx < nElems; ++idx)
{
if(arrayIsNull(nullBitMap, idx))
elems[idx] = 0;
else
elems[idx] = *values++;
}
JNI_releaseDoubleArrayElements(doubleArray, elems, JNI_COMMIT);
}
else
JNI_setDoubleArrayRegion(doubleArray, 0, nElems, (jdouble*)ARR_DATA_PTR(v));
#endif
result.l = (jobject)doubleArray;
return result;
}
static Datum _doubleArray_coerceObject(Type self, jobject doubleArray)
{
ArrayType* v;
jsize nElems;
if(doubleArray == 0)
return 0;
nElems = JNI_getArrayLength((jarray)doubleArray);
#if (PGSQL_MAJOR_VER == 8 && PGSQL_MINOR_VER < 2)
v = createArrayType(nElems, sizeof(jdouble), FLOAT8OID);
#else
v = createArrayType(nElems, sizeof(jdouble), FLOAT8OID, false);
#endif
if(!JNI_isInstanceOf( doubleArray, s_DoubleArray_class))
JNI_getDoubleArrayRegion((jdoubleArray)doubleArray, 0,
nElems, (jdouble*)ARR_DATA_PTR(v));
else
{
int idx = 0;
jdouble *array = (jdouble*)ARR_DATA_PTR(v);
for(idx = 0; idx < nElems; ++idx)
{
array[idx] = JNI_callDoubleMethod(JNI_getObjectArrayElement(doubleArray, idx),
s_Double_doubleValue);
}
}
PG_RETURN_ARRAYTYPE_P(v);
}
/*
* java.lang.Double type.
*/
static bool _Double_canReplace(Type self, Type other)
{
TypeClass cls = Type_getClass(other);
return Type_getClass(self) == cls || cls == s_doubleClass;
}
static jvalue _Double_coerceDatum(Type self, Datum arg)
{
jvalue result;
result.l = JNI_newObject(s_Double_class, s_Double_init, DatumGetFloat8(arg));
return result;
}
static Datum _Double_coerceObject(Type self, jobject doubleObj)
{
return _asDatum(doubleObj == 0 ? 0 : JNI_callDoubleMethod(doubleObj, s_Double_doubleValue));
}
static Type _double_createArrayType(Type self, Oid arrayTypeId)
{
return Array_fromOid2(arrayTypeId, self, _doubleArray_coerceDatum, _doubleArray_coerceObject);
}
/* Make this datatype available to the postgres system.
*/
extern void Double_initialize(void);
void Double_initialize(void)
{
Type t_double;
Type t_Double;
TypeClass cls;
s_Double_class = JNI_newGlobalRef(PgObject_getJavaClass("java/lang/Double"));
s_DoubleArray_class = JNI_newGlobalRef(PgObject_getJavaClass("[Ljava/lang/Double;"));
s_Double_init = PgObject_getJavaMethod(s_Double_class, "<init>", "(D)V");
s_Double_doubleValue = PgObject_getJavaMethod(s_Double_class, "doubleValue", "()D");
cls = TypeClass_alloc("type.Double");
cls->canReplaceType = _Double_canReplace;
cls->JNISignature = "Ljava/lang/Double;";
cls->javaTypeName = "java.lang.Double";
cls->coerceDatum = _Double_coerceDatum;
cls->coerceObject = _Double_coerceObject;
t_Double = TypeClass_allocInstance(cls, FLOAT8OID);
cls = TypeClass_alloc("type.double");
cls->JNISignature = "D";
cls->javaTypeName = "double";
cls->invoke = _double_invoke;
cls->coerceDatum = _double_coerceDatum;
cls->coerceObject = _Double_coerceObject;
cls->createArrayType = _double_createArrayType;
s_doubleClass = cls;
t_double = TypeClass_allocInstance(cls, FLOAT8OID);
t_double->objectType = t_Double;
Type_registerType("double", t_double);
Type_registerType("java.lang.Double", t_Double);
}