Resolve "Make report filenames customizable"

src/main/java/de/kosit/validationtool/cmd/DefaultNamingStrategy.java

@@ -0,0 +1,44 @@
+package de.kosit.validationtool.cmd;
+
+import static org.apache.commons.lang3.StringUtils.isNotEmpty;
+
+import org.apache.commons.lang3.StringUtils;
+
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * A default {@link NamingStrategy} supporting prefix and postfix configurations for generating report names
+ * 
+ * @author Andreas Penski
+ */
+@Getter
+@Setter
+public class DefaultNamingStrategy implements NamingStrategy {
+
+    private String prefix;
+
+    private String postfix = "report";
+
+    @Override
+    public String createName(final String base) {
+        if (StringUtils.isEmpty(base)) {
+            throw new IllegalArgumentException("Can not generate name based on null input");
+        }
+        final int index = base.lastIndexOf(".");
+        final StringBuilder result = new StringBuilder();
+        if (isNotEmpty(this.prefix)) {
+            result.append(this.prefix).append("-");
+        }
+        result.append(base, 0, index > 0 ? index : base.length());
+        if (isNotEmpty(this.postfix)) {
+            result.append("-").append(this.postfix);
+        }
+        if (index > 0) {
+            result.append(base.substring(index));
+        } else {
+            result.append(".xml");
+        }
+        return result.toString();
+    }
+}