Fix the ssl config

[clamp.git] / src / main / java / org / onap / clamp / clds / util / ResourceFileUtils.java

diff --git a/src/main/java/org/onap/clamp/clds/util/ResourceFileUtils.java b/src/main/java/org/onap/clamp/clds/util/ResourceFileUtils.java
new file mode 100644 (file)
index 0000000..f858ed2
--- /dev/null
+++ b/src/main/java/org/onap/clamp/clds/util/ResourceFileUtils.java
@@ -0,0 +1,89 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP CLAMP
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. 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.
+ * ============LICENSE_END============================================
+ * ===================================================================
+ *
+ */
+
+package org.onap.clamp.clds.util;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Scanner;
+
+/**
+ * Utility methods supporting resources accesses.
+ */
+public final class ResourceFileUtils {
+
+    /**
+     * getResourceAsStram supports the "file:" prefix as they use URL.
+     * So here we want to eliminate classpath: prefix, so that this class can get
+     * files from jar resource or file system.
+     */
+
+    private static final String CLASSPATH_PREFIX = "classpath:";
+
+    /**
+     * Private constructor to avoid creating instances of util class.
+     */
+    private ResourceFileUtils() {
+    }
+
+    /**
+     * Method to access a file from the jar resource folder or file system.
+     * Give the prefix "classpath:" so that it accesses the jar resource folder (default case)
+     * or the prefix "file:" so that it accesses the file system.
+     *
+     * @param fileName The path of the resource (no prefix it will be a classpath access,
+     *                 "classpath:/myfilename" or "file:/myfilename")
+     * @return The file as inputStream
+     */
+    public static InputStream getResourceAsStream(String fileName) {
+        InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream(
+                fileName.startsWith(CLASSPATH_PREFIX) ? fileName.replaceFirst(CLASSPATH_PREFIX, "") : fileName);
+        if (is == null) {
+            throw new IllegalArgumentException("Unable to find resource: " + fileName);
+        }
+        return is;
+    }
+
+    /**
+     * Method to access a resource file as a string.
+     * Give the prefix "classpath:" so that it accesses the jar resource folder (default case)
+     * or the prefix "file:" so that it accesses the file system.
+     *
+     * @param fileName The path of the resource (no prefix it will be a classpath access,
+     *                 "classpath:/myfilename" or "file:/myfilename")
+     * @return The file as String
+     * @throws IOException In case of failure to find the file.
+     */
+    public static String getResourceAsString(String fileName) throws IOException {
+        try (InputStream is = getResourceAsStream(fileName)) {
+            return streamToString(is);
+        }
+    }
+
+    private static String streamToString(InputStream inputStream) {
+        try (Scanner scanner = new Scanner(inputStream)) {
+            Scanner delimitedScanner = scanner.useDelimiter("\\A");
+            return delimitedScanner.hasNext() ? delimitedScanner.next() : "";
+        }
+    }
+}
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