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1 files changed, 35 insertions, 0 deletions

diff --git a/vespajlib/src/main/java/com/yahoo/text/Utf8PartialArray.java b/vespajlib/src/main/java/com/yahoo/text/Utf8PartialArray.java
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+++ b/vespajlib/src/main/java/com/yahoo/text/Utf8PartialArray.java
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+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.text;
+
+/**
+ * This wraps a window in a backing byte array. Without doing any copying.
+ * @author <a href="mailto:balder@yahoo-inc.com">Henning Baldersheim</a>
+ * @since 5.2
+ */
+public class Utf8PartialArray extends Utf8Array {
+    final int offset;
+    final int length;
+
+    /**
+     * Takes ownership of the given byte array. And keeps note of where
+     * the interesting utf8 sequence start and its length.
+     * @param utf8data The backing byte array.
+     * @param offset   The start of the utf8 sequence.
+     * @param bytes    The length of the utf8 sequence.
+     */
+    public Utf8PartialArray(byte[] utf8data, int offset, int bytes) {
+        super(utf8data);
+        this.offset = offset;
+        this.length = bytes;
+    }
+    @Override
+    public int getByteLength() {
+        return length;
+    }
+
+    @Override
+    protected int getByteOffset() {
+        return offset;
+    }
+
+}