1 files changed, 25 insertions, 0 deletions
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/preprocessor/PreProcessorCompare.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/preprocessor/PreProcessorCompare.java
new file mode 100644
index 00000000..ef716403
--- /dev/null
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/lib/impl/preprocessor/PreProcessorCompare.java
@@ -0,0 +1,25 @@
+package at.gv.egiz.pdfas.lib.impl.preprocessor;
+
+import java.util.Comparator;
+
+import at.gv.egiz.pdfas.lib.api.preprocessor.PreProcessor;
+
+public class PreProcessorCompare implements Comparator<PreProcessor> {
+
+	@Override
+	public int compare(PreProcessor o1, PreProcessor o2) {
+		if(o1.registrationPosition() < 0 && o2.registrationPosition() < 0) {
+			// equal
+			return 0;
+		} else if(o1.registrationPosition() < 0) {
+			// o2 vor o1
+			return 1;
+		} else if(o2.registrationPosition() < 0) {
+			// o1 vor o2
+			return -1;
+		} else {
+			return Integer.compare(o1.registrationPosition(), o2.registrationPosition());
+		}
+	}
+
+}