gjain wrote
we are trying to use SnakeYaml in scala but getting following problems:
When we are dumping any objects in yaml file, it throws exceptions in scala List class (cannot found Bean properties - No JavaBean properties found in "scala.$colon$colon") and same for org.joda.time.DateTime class.
Hi, I am from this team.
I have fixed the problem using two custom Representer(s), one for the Scala List and one for the Joda DateTime object. I would like to contribute them back.
Note that I "fixed" my username in the patch, so the NodeID may not be valid (I'm a gitter, not a hg'user, so I'm not sure how to "fix" the author of a commit already existing).
Note, that the Scala code also requires the Scala-JavaTools library, which I haven't patched into the POM. The Scala Representer should probably be in a sub-module, unless you don't mind raping your build, or trying to convert it to Java code :)
These should also be split in two - sorry :/
# HG changeset patch
# User antony.stubbs@gmail.com
# Date 1275116346 -43200
# Node ID c361e5675ef1146c0df3f6590b75f1ce06facf53
# Parent 134ff5bf4e63f0ba553aa60fe35ce63b43501983
Custom Representers for Scala List and JodaTime DateTime
Both written in Scala. Probably need to go into a sub-module of some kind.
Also had to copy the implementation of addTag as it was private. Also needed to use the same package name because the Representer class is package private.
Not entirely sure this was the right way to do it, but it works great for us.
diff -r 134ff5bf4e63 -r c361e5675ef1 AUTHORS
--- a/AUTHORS Fri May 28 02:17:23 2010 +0200
+++ b/AUTHORS Sat May 29 18:59:06 2010 +1200
@@ -23,3 +23,4 @@
Magne at edb
infinity0x
obastard
+Antony Stubbs <antony.stubbs@gmail.com> - Scala List and JodaTime DateTime Representer
\ No newline at end of file
diff -r 134ff5bf4e63 -r c361e5675ef1 src/main/java/org/yaml/snakeyaml/representer/CustomRepresenter.scala
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/org/yaml/snakeyaml/representer/CustomRepresenter.scala Sat May 29 18:59:06 2010 +1200
@@ -0,0 +1,21 @@
+package org.yaml.snakeyaml.representer
+
+import org.scala_tools.javautils.Implicits._
+
+import org.yaml.snakeyaml.nodes.{Node, Tag}
+import org.joda.time.{DateTimeZone, DateTime}
+
+/**
+ * @author Antony Stubbs
+ */
+class CustomRepresenter extends Representer {
+
+ def getTag(clazz:Class[_], defaultTag:Tag):Tag = {
+ if (classTags.containsKey(clazz)) {
+ return classTags.get(clazz)
+ } else {
+ return defaultTag
+ }
+ }
+
+}
\ No newline at end of file
diff -r 134ff5bf4e63 -r c361e5675ef1 src/main/java/org/yaml/snakeyaml/representer/JodaTimeRepresenter.scala
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/org/yaml/snakeyaml/representer/JodaTimeRepresenter.scala Sat May 29 18:59:06 2010 +1200
@@ -0,0 +1,84 @@
+package org.yaml.snakeyaml.representer
+
+import org.scala_tools.javautils.Implicits._
+
+import org.yaml.snakeyaml.nodes.{Node, Tag}
+import org.joda.time.{DateTimeZone, DateTime}
+
+/**
+ * @author Antony Stubbs
+ */
+trait JodaTimeRepresenter extends CustomRepresenter {
+
+ multiRepresenters.put(classOf[DateTime], new RepresentJodaDateTime())
+
+ private class RepresentJodaDateTime extends Represent {
+
+ def representData(data:Object):Node = {
+ val dt:DateTime = data.asInstanceOf[DateTime]
+ val years = dt.getYear
+ val months = dt.getMonthOfYear
+ val days = dt.getDayOfMonth
+ val hour24 = dt.getHourOfDay
+ val minutes = dt.getMinuteOfHour
+ val seconds = dt.getSecondOfMinute
+ val millis = dt.getMillisOfSecond
+ var buffer = new StringBuilder(String.valueOf(years))
+ buffer.append("-")
+ if (months < 10) {
+ buffer.append("0")
+ }
+ buffer.append(String.valueOf(months))
+ buffer.append("-")
+ if (days < 10) {
+ buffer.append("0")
+ }
+ buffer.append(String.valueOf(days))
+ buffer.append("T")
+ if (hour24 < 10) {
+ buffer.append("0")
+ }
+ buffer.append(String.valueOf(hour24))
+ buffer.append(":")
+ if (minutes < 10) {
+ buffer.append("0")
+ }
+ buffer.append(String.valueOf(minutes))
+ buffer.append(":")
+ if (seconds < 10) {
+ buffer.append("0")
+ }
+ buffer.append(String.valueOf(seconds))
+ if (millis > 0) {
+ if (millis < 10) {
+ buffer.append(".00")
+ } else if (millis < 100) {
+ buffer.append(".0")
+ } else {
+ buffer.append(".")
+ }
+ buffer.append(String.valueOf(millis))
+ }
+ if (DateTimeZone.UTC.equals(dt.getZone)) {
+ buffer.append("Z");
+ } else {
+ // Get the Offset from GMT taking DST into account
+ var gmtOffset = dt.getZone().getOffset(dt)
+ var minutesOffset = gmtOffset / (60 * 1000);
+ var hoursOffset = minutesOffset / 60;
+ var partOfHour = minutesOffset % 60;
+ if(hoursOffset > 0){
+ buffer.append("+")
+ }
+ buffer.append(hoursOffset + ":")
+ if(partOfHour < 10 ){
+ buffer.append("0" + partOfHour)
+ } else {
+ buffer.append(partOfHour)
+ }
+ }
+ return representScalar(getTag(data.getClass(), Tag.TIMESTAMP), buffer.toString(), null)
+ }
+ }
+
+}
\ No newline at end of file
diff -r 134ff5bf4e63 -r c361e5675ef1 src/main/java/org/yaml/snakeyaml/representer/ScalaRepresenter.scala
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/org/yaml/snakeyaml/representer/ScalaRepresenter.scala Sat May 29 18:59:06 2010 +1200
@@ -0,0 +1,25 @@
+package org.yaml.snakeyaml.representer
+
+import org.scala_tools.javautils.Implicits._
+
+import org.yaml.snakeyaml.nodes.{Node, Tag}
+import org.joda.time.{DateTimeZone, DateTime}
+
+/**
+ * @author Antony Stubbs
+ */
+trait ScalaRepresenter extends CustomRepresenter {
+
+ multiRepresenters.put(classOf[::[Object]], new RepresentList())
+
+ private class RepresentList extends Represent {
+
+ def representData(data:Object):Node = {
+ val scalaList = data.asInstanceOf[List[_ <: Object]]
+ val javaList = scalaList.asJava
+ return representSequence(getTag(javaList.getClass(), Tag.SEQ), javaList, null)
+ }
+
+ }
+
+}
\ No newline at end of file
Locked
