Feat: Add getDisplayName()

Added the getDisplayName() function, which returns the filename without
the zipfile subpath prefix

CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/zip/CityGmlZipEntry.java

@@ -20,6 +20,7 @@ public class CityGmlZipEntry implements Serializable {
     private static final long serialVersionUID = -5732913269959043262L;
 
     private final String fileName;
+    private final String displayName;
     private transient CityDoctorModel model;
     private CityGmlZipArchive parentArchive;
     private boolean decompressed;
@@ -85,6 +86,8 @@ public class CityGmlZipEntry implements Serializable {
 
     protected CityGmlZipEntry(ZipEntry entry, CityGmlZipArchive parentArchive, boolean decompressed) {
         this.fileName = entry.getName();
+        String[] nameSplits = fileName.split("/");
+        this.displayName = nameSplits[nameSplits.length - 1];
         if (entry.getSize() != -1) {
             this.fileSize = entry.getSize();
         }
@@ -105,6 +108,10 @@ public class CityGmlZipEntry implements Serializable {
         return fileName;
     }
 
+    public String getDisplayName() {
+        return displayName;
+    }
+
     public ZipEntryErrorType getErrorType() {
         return errorType;
     }