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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.document.serialization;
/**
* Class used to represent up to 4 flags used in a DocumentUpdate.
* These flags are stored as the 4 most significant bits in a 32 bit integer.
*
* Flags currently used:
* 0) create-if-non-existent.
*
* @author geirst
*/
public class DocumentUpdateFlags {
private byte flags;
private DocumentUpdateFlags(byte flags) {
this.flags = flags;
}
public DocumentUpdateFlags() {
this.flags = 0;
}
public boolean getCreateIfNonExistent() {
return (flags & 1) != 0;
}
public void setCreateIfNonExistent(boolean value) {
flags &= ~1; // clear flag
flags |= value ? (byte)1 : (byte)0; // set flag
}
public int injectInto(int value) {
return extractValue(value) | (flags << 28);
}
public static DocumentUpdateFlags extractFlags(int combined) {
return new DocumentUpdateFlags((byte)(combined >> 28));
}
public static int extractValue(int combined) {
int mask = ~(~0 << 28);
return combined & mask;
}
}
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