Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.impl / src / org / simantics / db / impl / graph / RandomAccessSubList.java

diff --git a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/graph/RandomAccessSubList.java b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/graph/RandomAccessSubList.java
new file mode 100644 (file)
index 0000000..05251c1
--- /dev/null
+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/graph/RandomAccessSubList.java
@@ -0,0 +1,28 @@
+package org.simantics.db.impl.graph;\r
+\r
+import java.util.AbstractList;\r
+import java.util.List;\r
+\r
+public class RandomAccessSubList<T> extends AbstractList<T> {\r
+    private final List<T> baseList;\r
+    private final int fromIndex;\r
+    private final int length;\r
+    \r
+    public RandomAccessSubList(List<T> baseList, int fromIndex, int length) {\r
+        this.baseList = baseList;\r
+        this.fromIndex = fromIndex;\r
+        this.length = length;\r
+    }\r
+\r
+    @Override\r
+    public T get(int index) {\r
+        if(index < 0 || index > length)\r
+            throw new IndexOutOfBoundsException();\r
+        return baseList.get(index+fromIndex);\r
+    }\r
+\r
+    @Override\r
+    public int size() {\r
+        return length;\r
+    }\r
+}\r