[New] Added new ExceptionHelper

- moved exception helper methods from StringHelper to ExceptionHelper

src/main/java/ch/eitchnet/utils/helper/ExceptionHelper.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright 2015 Robert von Burg <eitch@eitchnet.ch>
+ * 
+ * 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 ch.eitchnet.utils.helper;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+/**
+ * @author Robert von Burg <eitch@eitchnet.ch>
+ */
+public class ExceptionHelper {
+
+	/**
+	 * <p>
+	 * Returns a message for the given {@link Throwable}
+	 * </p>
+	 * 
+	 * <p>
+	 * A {@link NullPointerException} only has <code>null</code> as the message so this methods returns the class name
+	 * in such a case
+	 * </p>
+	 * 
+	 * @param t
+	 * @return
+	 */
+	public static String getExceptionMessage(Throwable t) {
+		return StringHelper.isEmpty(t.getMessage()) ? t.getClass().getName() : t.getMessage();
+	}
+
+	/**
+	 * Formats the given {@link Throwable}'s stack trace to a string
+	 * 
+	 * @param t
+	 *            the throwable for which the stack trace is to be formatted to string
+	 * 
+	 * @return a string representation of the given {@link Throwable}'s stack trace
+	 */
+	public static String formatException(Throwable t) {
+		StringWriter stringWriter = new StringWriter();
+		PrintWriter writer = new PrintWriter(stringWriter);
+		t.printStackTrace(writer);
+		return stringWriter.toString();
+	}
+
+	/**
+	 * Formats the given {@link Throwable}'s message including causes to a string
+	 * 
+	 * @param t
+	 *            the throwable for which the messages are to be formatted to a string
+	 * 
+	 * @return a string representation of the given {@link Throwable}'s messages including causes
+	 */
+	public static String formatExceptionMessage(Throwable t) {
+		StringBuilder sb = new StringBuilder();
+		sb.append(t.getMessage());
+		appendCause(sb, t);
+		return sb.toString();
+	}
+
+	private static void appendCause(StringBuilder sb, Throwable e) {
+		Throwable cause = e.getCause();
+		if (cause == null)
+			return;
+
+		sb.append("\n");
+
+		sb.append("cause:\n");
+		sb.append(cause.getMessage());
+
+		if (cause.getCause() != null)
+			appendCause(sb, cause.getCause());
+	}
+
+}

src/main/java/ch/eitchnet/utils/helper/StringHelper.java

@@ -15,8 +15,6 @@
  */
 package ch.eitchnet.utils.helper;
 
-import java.io.PrintWriter;
-import java.io.StringWriter;
 import java.io.UnsupportedEncodingException;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
@@ -564,64 +562,24 @@ public class StringHelper {
 	}
 
 	/**
-	 * <p>
-	 * Returns a message for the given {@link Throwable}
-	 * </p>
-	 * 
-	 * <p>
-	 * A {@link NullPointerException} only has <code>null</code> as the message so this methods returns the class name
-	 * in such a case
-	 * </p>
-	 * 
-	 * @param t
-	 * @return
+	 * @see ExceptionHelper#formatException(Throwable)
 	 */
 	public static String getExceptionMessage(Throwable t) {
-		return StringHelper.isEmpty(t.getMessage()) ? t.getClass().getName() : t.getMessage();
+		return ExceptionHelper.getExceptionMessage(t);
 	}
 
 	/**
-	 * Formats the given {@link Throwable}'s stack trace to a string
-	 * 
-	 * @param t
-	 *            the throwable for which the stack trace is to be formatted to string
-	 * 
-	 * @return a string representation of the given {@link Throwable}'s stack trace
+	 * @see ExceptionHelper#formatException(Throwable)
 	 */
 	public static String formatException(Throwable t) {
-		StringWriter stringWriter = new StringWriter();
-		PrintWriter writer = new PrintWriter(stringWriter);
-		t.printStackTrace(writer);
-		return stringWriter.toString();
+		return ExceptionHelper.formatException(t);
 	}
 
 	/**
-	 * Formats the given {@link Throwable}'s message including causes to a string
-	 * 
-	 * @param t
-	 *            the throwable for which the messages are to be formatted to a string
-	 * 
-	 * @return a string representation of the given {@link Throwable}'s messages including causes
+	 * @see ExceptionHelper#formatExceptionMessage(Throwable)
 	 */
 	public static String formatExceptionMessage(Throwable t) {
-		StringBuilder sb = new StringBuilder();
-		sb.append(t.getMessage());
-		appendCause(sb, t);
-		return sb.toString();
-	}
-
-	private static void appendCause(StringBuilder sb, Throwable e) {
-		Throwable cause = e.getCause();
-		if (cause == null)
-			return;
-
-		sb.append("\n");
-
-		sb.append("cause:\n");
-		sb.append(cause.getMessage());
-
-		if (cause.getCause() != null)
-			appendCause(sb, cause.getCause());
+		return ExceptionHelper.formatExceptionMessage(t);
 	}
 
 	/**