From 352220702f1d8449fcb31929fc44f4bfb2f516f1 Mon Sep 17 00:00:00 2001
From: Robert von Burg <eitch@eitchnet.ch>
Date: Fri, 29 Jun 2018 13:59:27 +0200
Subject: [PATCH] [Minor] add documentation about custom search expression on
 website

---
 .../src/main/java/li/strolch/search/SearchExpression.java    | 1 +
 .../www.strolch.li/documentation-searches.html               | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/li.strolch.agent/src/main/java/li/strolch/search/SearchExpression.java b/li.strolch.agent/src/main/java/li/strolch/search/SearchExpression.java
index 96aaf7f24..d6a5138ca 100644
--- a/li.strolch.agent/src/main/java/li/strolch/search/SearchExpression.java
+++ b/li.strolch.agent/src/main/java/li/strolch/search/SearchExpression.java
@@ -10,6 +10,7 @@ import li.strolch.model.activity.Activity;
  *
  * @param <T>
  */
+@FunctionalInterface
 public interface SearchExpression<T extends StrolchRootElement> {
 
 	/**
diff --git a/li.strolch.website/www.strolch.li/documentation-searches.html b/li.strolch.website/www.strolch.li/documentation-searches.html
index ea2eb9971..d2cdae18d 100644
--- a/li.strolch.website/www.strolch.li/documentation-searches.html
+++ b/li.strolch.website/www.strolch.li/documentation-searches.html
@@ -120,6 +120,11 @@ search.where(id(isEqualTo("myId")) //
         <p>Note how the predicates can be chained to the search expression, or passed as a parameter to the
            expression.</p>
 
+        <p>In addition to using predefined search search expressions, one can also just pass a lambda expression which
+           performs a custom filter:</p>
+        <pre>
+personSearch.where(person -> person.getName().length() == 3);</pre>
+
         <p>See the
             <a href="https://github.com/4treesCH/strolch/blob/develop/li.strolch.agent/src/test/java/li/strolch/search/StrolchSearchTest.java"
                target="_blank">StrolchSearchTest</a> for many ways in which you can implement tests.</p>