1 files changed, 111 insertions, 0 deletions
diff --git a/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/JREFileResolver.java b/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/JREFileResolver.java
new file mode 100755
index 000000000..c4a4fca47
--- /dev/null
+++ b/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/JREFileResolver.java
@@ -0,0 +1,111 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * onap
+ * ================================================================================
+ * Copyright (C) 2016 - 2017 ONAP
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.utils;
+
+import java.io.File;
+import java.io.InputStream;
+import java.net.URL;
+import java.nio.file.CopyOption;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.util.Optional;
+
+import org.osgi.framework.Bundle;
+import org.osgi.framework.FrameworkUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Resolves project properties files relative to the directory identified by the JRE property
+ * <code>dblib.properties</code>.
+ */
+public class JREFileResolver implements PropertiesFileResolver {
+
+    /**
+     * Key for JRE argument representing the configuration directory
+     */
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(JREFileResolver.class);
+    private final String successMessage;
+    private final Class<?> clazz;
+
+    public JREFileResolver(final String successMessage, final Class<?> clazz) {
+        this.successMessage = successMessage;
+        this.clazz = clazz;
+    }
+
+    /**
+     * Parse a properties file location based on JRE argument
+     *
+     * @return an Optional File containing the location if it exists, or an empty Optional
+     */
+    @Override
+    public Optional<File> resolveFile(final String filename) {
+
+        try {
+
+            final Bundle bundle = FrameworkUtil.getBundle(this.clazz);
+            if (bundle == null) {
+                return Optional.empty();
+            }
+
+            URL jreArgumentEntry = bundle.getEntry(filename);
+            if (jreArgumentEntry == null) {
+                return Optional.empty();
+            }
+
+
+            final File dataFile = bundle.getDataFile(filename);
+            if(dataFile.exists()) {
+                dataFile.delete();
+            }
+
+            try (InputStream input = jreArgumentEntry.openStream()){
+                Files.copy(input, dataFile.toPath());
+            } catch(Exception exc) {
+                return Optional.empty();
+            }
+
+            return Optional.of(dataFile);
+        } catch (final NoClassDefFoundError e) {
+            LOGGER.info("Getting /{} embedded with {}", filename, clazz.getCanonicalName());
+            try (InputStream input = clazz.getResourceAsStream("/"+filename)) {
+                File propFile = File.createTempFile("tmp", ".properties", null);
+                LOGGER.info("Copying /{} to {}", filename, propFile.getAbsolutePath());
+                Files.copy(input, propFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
+                return Optional.of(propFile);
+            } catch (Exception e1) {
+                LOGGER.info("Caught exception getting {} embedded in jar", filename, e1);
+                return Optional.empty();
+            }
+        }
+        catch(final Exception e) {
+            return Optional.empty();
+        }
+
+    }
+
+    @Override
+    public String getSuccessfulResolutionMessage() {
+        return this.successMessage;
+    }
+}