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authorVlad Dumitrescu <[email protected]>2015-12-03 19:27:52 +0100
committerVlad Dumitrescu <[email protected]>2015-12-03 19:32:00 +0100
commitff76dce72f52c5fd2d06461414dac52a70ba43cc (patch)
tree9f5040237f28f59a6fe132561141bcdb8c506677 /lib/jinterface/java_src/com/ericsson/otp
parent417101bca30b5ae246b97485c7898c4e5c663b9c (diff)
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Improve sorting order of keys in a map
The implementation sorted keys differently for different Java versions (probably due to different hashing algorithms), so we switch it to use LinkedHashMap where the order is deterministic.
Diffstat (limited to 'lib/jinterface/java_src/com/ericsson/otp')
-rw-r--r--lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangMap.java23
1 files changed, 16 insertions, 7 deletions
diff --git a/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangMap.java b/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangMap.java
index 0fd7d3ce37..30126db3fd 100644
--- a/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangMap.java
+++ b/lib/jinterface/java_src/com/ericsson/otp/erlang/OtpErlangMap.java
@@ -19,7 +19,7 @@
*/
package com.ericsson.otp.erlang;
-import java.util.HashMap;
+import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
@@ -37,13 +37,22 @@ public class OtpErlangMap extends OtpErlangObject {
// don't change this!
private static final long serialVersionUID = -6410770117696198497L;
- private HashMap<OtpErlangObject, OtpErlangObject> map;
+ private OtpMap map;
+
+ private static class OtpMap
+ extends LinkedHashMap<OtpErlangObject, OtpErlangObject> {
+ private static final long serialVersionUID = -2666505810905455082L;
+
+ public OtpMap() {
+ super();
+ }
+ }
/**
* Create an empty map.
*/
public OtpErlangMap() {
- map = new HashMap<OtpErlangObject, OtpErlangObject>();
+ map = new OtpMap();
}
/**
@@ -93,7 +102,7 @@ public class OtpErlangMap extends OtpErlangObject {
throw new java.lang.IllegalArgumentException(
"Map keys and values must have same arity");
}
- map = new HashMap<OtpErlangObject, OtpErlangObject>(vcount);
+ map = new OtpMap();
OtpErlangObject key, val;
for (int i = 0; i < vcount; i++) {
if ((key = keys[kstart + i]) == null) {
@@ -125,7 +134,7 @@ public class OtpErlangMap extends OtpErlangObject {
final int arity = buf.read_map_head();
if (arity > 0) {
- map = new HashMap<OtpErlangObject, OtpErlangObject>(arity);
+ map = new OtpMap();
for (int i = 0; i < arity; i++) {
OtpErlangObject key, val;
key = buf.read_any();
@@ -133,7 +142,7 @@ public class OtpErlangMap extends OtpErlangObject {
put(key, val);
}
} else {
- map = new HashMap<OtpErlangObject, OtpErlangObject>();
+ map = new OtpMap();
}
}
@@ -350,7 +359,7 @@ public class OtpErlangMap extends OtpErlangObject {
@SuppressWarnings("unchecked")
public Object clone() {
final OtpErlangMap newMap = (OtpErlangMap) super.clone();
- newMap.map = (HashMap<OtpErlangObject, OtpErlangObject>) map.clone();
+ newMap.map = (OtpMap) map.clone();
return newMap;
}
}