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authorJon Bratseth <bratseth@yahoo-inc.com>2016-06-15 23:09:44 +0200
committerJon Bratseth <bratseth@yahoo-inc.com>2016-06-15 23:09:44 +0200
commit72231250ed81e10d66bfe70701e64fa5fe50f712 (patch)
tree2728bba1131a6f6e5bdf95afec7d7ff9358dac50 /vespajlib/src/main/java/com/yahoo/text/Utf8Array.java
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Diffstat (limited to 'vespajlib/src/main/java/com/yahoo/text/Utf8Array.java')
-rw-r--r--vespajlib/src/main/java/com/yahoo/text/Utf8Array.java67
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diff --git a/vespajlib/src/main/java/com/yahoo/text/Utf8Array.java b/vespajlib/src/main/java/com/yahoo/text/Utf8Array.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;
+
+
+import java.nio.ByteBuffer;
+
+/**
+ * This is a primitive class that owns an array of utf8 encoded string.
+ * This is a class that has speed as its primary purpose.
+ * If you have a string, consider Utf8String
+ * If you have a large backing array consider Utf8PartialArray
+ * @author <a href="mailto:balder@yahoo-inc.com">Henning Baldersheim</a>
+ * @since 5.2
+ */
+
+public class Utf8Array extends AbstractUtf8Array {
+
+ protected final byte[] utf8;
+
+ /**
+ * This will simply wrap the given array assuming it is valid utf8.
+ * Note that the immutability of this primitive class depends on that the buffer
+ * is not modified after ownership has been transferred.
+ * @param utf8data The utf8 byte sequence.
+ */
+ public Utf8Array(final byte[] utf8data) {
+ utf8 = utf8data;
+ }
+
+ /**
+ * This will create a new array from the window given. No validation done.
+ * Note that this will copy data. You might also want to consider Utf8PartialArray
+ * @param utf8data The base array.
+ * @param offset The offset from where to copy from
+ * @param length The number of bytes that should be copied.
+ */
+ public Utf8Array(byte[] utf8data, int offset, int length) {
+ this.utf8 = new byte[length];
+ System.arraycopy(utf8data, offset, this.utf8, 0, length);
+ }
+
+ /**
+ * This will fetch length bytes from the given buffer.
+ * @param buf The ByteBuffer to read from
+ * @param length number of bytes to read
+ */
+ public Utf8Array(ByteBuffer buf, int length) {
+ this.utf8 = new byte[length];
+ buf.get(this.utf8, 0, length);
+ }
+
+ @Override
+ public byte[] getBytes() {
+ return utf8;
+ }
+
+ @Override
+ public int getByteLength() {
+ return utf8.length;
+ }
+
+ @Override
+ protected int getByteOffset() {
+ return 0;
+ }
+
+}