Changeset 15732 in josm for trunk/src/org/openstreetmap/josm/tools/StreamUtils.java

Timestamp:

2020-01-19T18:57:26+01:00 (4 years ago)

Author:

simon04

Message:

see #18503 - Relation editor: compute wayConnection for type=superroute

This basic implementation only considers route segments without a role
(as specified for public_transport:version=2; no forward/backward)
and does not take roundabouts into account.

File:

• trunk/src/org/openstreetmap/josm/tools/StreamUtils.java (modified) (2 diffs)

trunk/src/org/openstreetmap/josm/tools/StreamUtils.java

@@ -2 +2 @@
 package org.openstreetmap.josm.tools;
 
+import java.util.List;
+import java.util.Objects;
 import java.util.StringJoiner;
 import java.util.stream.Collector;
+import java.util.stream.IntStream;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
@@ -32 +35 @@
 
     /**
+     * Creqates a stream iterating the list in reversed order
+     * @param list the list to iterate over
+     * @param <T> the type of elements in the list
+     * @return a stream iterating the list in reversed order
+     * @since 15732
+     */
+    public static <T> Stream<T> reversedStream(List<T> list) {
+        Objects.requireNonNull(list, "list");
+        final int size = list.size();
+        return IntStream.range(0, size).mapToObj(i -> list.get(size - i - 1));
+    }
+
+    /**
      * Creates a new Collector that collects the items and returns them as HTML unordered list.
      * @return The collector.