From b5867a05a7adf5d1c89721bf42a5bbaddb47dbd9 Mon Sep 17 00:00:00 2001
From: Allen Byrne <byrn@hdfgroup.org>
Date: Tue, 13 Mar 2018 17:21:02 -0500
Subject: HDFFV-10412 add error on function for Java

---
 java/src/hdf/hdf5lib/H5.java |  8 +++++++-
 java/src/jni/exceptionImp.c  | 17 +++++++++++++++++
 java/src/jni/exceptionImp.h  | 10 ++++++++++
 java/src/jni/h5util.c        |  3 +++
 4 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/java/src/hdf/hdf5lib/H5.java b/java/src/hdf/hdf5lib/H5.java
index 20aa634..9d1aed1 100644
--- a/java/src/hdf/hdf5lib/H5.java
+++ b/java/src/hdf/hdf5lib/H5.java
@@ -424,7 +424,7 @@ public class H5 implements java.io.Serializable {
     private synchronized static native int H5dont_atexit() throws HDF5LibraryException;
 
     /**
-     * Turn off error handling By default, the C library prints the error stack of the HDF-5 C library on stdout. This
+     * Turn off error handling. By default, the C library prints the error stack of the HDF-5 C library on stdout. This
      * behavior may be disabled by calling H5error_off().
      *
      * @return a non-negative value if successful
@@ -432,6 +432,12 @@ public class H5 implements java.io.Serializable {
     public synchronized static native int H5error_off();
 
     /**
+     * Turn on error handling. By default, the C library prints the error stack of the HDF-5 C library on stdout. This
+     * behavior may be reenabled by calling H5error_on().
+     */
+    public synchronized static native void H5error_on();
+
+    /**
      * H5garbage_collect collects on all free-lists of all types.
      *
      * @return a non-negative value if successful
diff --git a/java/src/jni/exceptionImp.c b/java/src/jni/exceptionImp.c
index 05c193f..afad5d5 100644
--- a/java/src/jni/exceptionImp.c
+++ b/java/src/jni/exceptionImp.c
@@ -33,6 +33,9 @@ extern "C" {
 #include "h5jni.h"
 #include "exceptionImp.h"
 
+extern H5E_auto2_t         efunc;
+extern void               *edata;
+
 
 /*******************/
 /* Local Variables */
@@ -122,10 +125,24 @@ JNIEXPORT jint JNICALL
 Java_hdf_hdf5lib_H5_H5error_1off
     (JNIEnv *env, jclass clss)
 {
+    H5Eget_auto2(H5E_DEFAULT, &efunc, &edata);
     H5Eset_auto2(H5E_DEFAULT, NULL, NULL);
     return 0;
 } /* end Java_hdf_hdf5lib_H5_H5error_1off() */
 
+/*
+ * Class:     hdf_hdf5lib_exceptions_HDF5Library
+ * Method:    H5error_on
+ * Signature: ()V
+ *
+ */
+JNIEXPORT void JNICALL
+Java_hdf_hdf5lib_H5_H5error_1on
+    (JNIEnv *env, jclass clss)
+{
+    H5Eset_auto2(H5E_DEFAULT, efunc, edata);
+} /* end Java_hdf_hdf5lib_H5_H5error_1on() */
+
 
 /*
  * Class:     hdf_hdf5lib_exceptions_HDFLibraryException
diff --git a/java/src/jni/exceptionImp.h b/java/src/jni/exceptionImp.h
index cb74602..423e537 100644
--- a/java/src/jni/exceptionImp.h
+++ b/java/src/jni/exceptionImp.h
@@ -31,6 +31,16 @@ JNIEXPORT jint JNICALL
 Java_hdf_hdf5lib_H5_H5error_1off
   (JNIEnv *env, jclass clss );
 
+/*
+ * Class:     hdf_hdf5lib_exceptions_HDF5Library
+ * Method:    H5error_on
+ * Signature: ()V
+ *
+ */
+JNIEXPORT void JNICALL
+Java_hdf_hdf5lib_H5_H5error_1on
+  (JNIEnv *env, jclass clss );
+
 
 /*
  * Class:     hdf_hdf5lib_exceptions_HDFLibraryException
diff --git a/java/src/jni/h5util.c b/java/src/jni/h5util.c
index bd9fc0f..fdabd76 100644
--- a/java/src/jni/h5util.c
+++ b/java/src/jni/h5util.c
@@ -41,6 +41,9 @@ jobject get_callback;
 jobject set_callback;
 jobject delete_callback;
 
+H5E_auto2_t         efunc;
+void               *edata;
+
 /********************/
 /* Local Prototypes */
 /********************/
-- 
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