methods for iterators and filters

2011-12-20 15:56:10 +02:00
parent 117f03cbbf
commit d37c6976b1
3 changed files with 102 additions and 0 deletions
@@ -0,0 +1,38 @@
+namespace std.util
+
+import java.util.*
+import java.util.Iterator
+
+/*
+Add iterated elements to given container
+*/
+fun <T,U: Collection<in T>> java.util.Iterator<T>.to(container: U) : U {
+    while(hasNext())
+        container.add(next())
+    return container
+}
+
+/*
+Add iterated elements to java.util.ArrayList
+*/
+inline fun <T> java.util.Iterator<T>.toArrayList() = to(ArrayList<T>())
+
+/*
+Add iterated elements to java.util.LinkedList
+*/
+inline fun <T> java.util.Iterator<T>.toLinkedList() = to(LinkedList<T>())
+
+/*
+Add iterated elements to java.util.HashSet
+*/
+inline fun <T> java.util.Iterator<T>.toHashSet() = to(HashSet<T>())
+
+/*
+Add iterated elements to java.util.LinkedHashSet
+*/
+inline fun <T> java.util.Iterator<T>.toLinkedHashSet() = to(LinkedHashSet<T>())
+
+/*
+Add iterated elements to java.util.TreeSet
+*/
+inline fun <T> java.util.Iterator<T>.toTreeSet() = to(TreeSet<T>())