From 3328dd1f8dc784021e6bc0350cabc93b44b582c4 Mon Sep 17 00:00:00 2001
From: krasimir <krasimir@chalmers.se>
Date: Thu, 3 Sep 2015 13:52:32 +0000
Subject: Java API for opening/closing SG databases

---
 src/runtime/java/jsg.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 src/runtime/java/jsg.c

(limited to 'src/runtime/java/jsg.c')

diff --git a/src/runtime/java/jsg.c b/src/runtime/java/jsg.c
new file mode 100644
index 000000000..8f790505e
--- /dev/null
+++ b/src/runtime/java/jsg.c
@@ -0,0 +1,79 @@
+#include <jni.h>
+#include <sg/sg.h>
+#include "jni_utils.h"
+
+JNIEXPORT jobject JNICALL
+Java_org_grammaticalframework_sg_SG_openSG(JNIEnv *env, jclass cls, jstring path)
+{
+	GuPool* tmp_pool = gu_local_pool();
+
+	// Create an exception frame that catches all errors.
+	GuExn* err = gu_exn(tmp_pool);
+
+	const char *fpath = (*env)->GetStringUTFChars(env, path, 0); 
+
+	// Read the PGF grammar.
+	SgSG* sg = sg_open(fpath, err);
+
+	(*env)->ReleaseStringUTFChars(env, path, fpath);
+
+	if (!gu_ok(err)) {
+		GuString msg;
+		if (gu_exn_caught(err, SgError)) {
+			msg = (GuString) gu_exn_caught_data(err);
+		} else {
+			msg = "The database cannot be opened";
+		}
+		throw_string_exception(env, "org/grammaticalframework/sg/SGError", msg);
+		gu_pool_free(tmp_pool);
+		return NULL;
+	}
+
+	gu_pool_free(tmp_pool);
+
+	jmethodID constrId = (*env)->GetMethodID(env, cls, "<init>", "(J)V");
+	return (*env)->NewObject(env, cls, constrId, p2l(sg));
+}
+
+JNIEXPORT void JNICALL
+Java_org_grammaticalframework_sg_SG_close(JNIEnv *env, jobject self)
+{
+	GuPool* tmp_pool = gu_local_pool();
+
+	// Create an exception frame that catches all errors.
+	GuExn* err = gu_exn(tmp_pool);
+
+	sg_close(get_ref(env, self), err);
+	if (!gu_ok(err)) {
+		GuString msg;
+		if (gu_exn_caught(err, SgError)) {
+			msg = (GuString) gu_exn_caught_data(err);
+		} else {
+			msg = "The database cannot be closed";
+		}
+		throw_string_exception(env, "org/grammaticalframework/sg/SGError", msg);
+		gu_pool_free(tmp_pool);
+		return;
+	}
+
+	gu_pool_free(tmp_pool);
+}
+
+JNIEXPORT jobject JNICALL
+Java_org_grammaticalframework_sg_SG_queryTriple(JNIEnv *env, jobject self,
+                                                jobject subj,
+                                                jobject pred,
+                                                jobject obj)
+{
+	return NULL;
+}
+
+JNIEXPORT jboolean JNICALL
+Java_org_grammaticalframework_sg_TripleResult_hasNext(JNIEnv *env, jobject self)
+{
+}
+
+JNIEXPORT void JNICALL
+Java_org_grammaticalframework_sg_TripleResult_close(JNIEnv *env, jobject self)
+{
+}
-- 
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