add PagesCorruptException to better differentiate exception causes

Author: greenrobot

objectbox-java/src/main/java/io/objectbox/exception/PagesCorruptException.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2020 ObjectBox Ltd. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.objectbox.exception;
+
+/** Errors were detected in a file related to pages, e.g. illegal values or structural inconsistencies. */
+public class PagesCorruptException extends FileCorruptException {
+    public PagesCorruptException(String message) {
+        super(message);
+    }
+
+    public PagesCorruptException(String message, int errorCode) {
+        super(message, errorCode);
+    }
+}

tests/objectbox-java-test/src/test/java/io/objectbox/BoxStoreBuilderTest.java

@@ -16,7 +16,7 @@
 
 package io.objectbox;
 
-import io.objectbox.exception.FileCorruptException;
+import io.objectbox.exception.PagesCorruptException;
 import io.objectbox.model.ValidateOnOpenMode;
 import org.greenrobot.essentials.io.IoUtils;
 import org.junit.Before;
@@ -152,7 +152,7 @@ public void validateOnOpen() {
     }
 
 
-    @Test(expected = FileCorruptException.class)
+    @Test(expected = PagesCorruptException.class)
     public void validateOnOpenCorruptFile() throws IOException {
         File dir = prepareTempDir("object-store-test-corrupted");
         File badDataFile = prepareBadDataFile(dir);
@@ -192,7 +192,7 @@ public void usePreviousCommitAfterFileCorruptException() throws IOException {
         try {
             store = builder.build();
             fail("Should have thrown");
-        } catch (FileCorruptException e) {
+        } catch (PagesCorruptException e) {
             builder.usePreviousCommit();
             store = builder.build();
         }