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https://issues.apache.org/jira/browse/WW-4034?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16276720#comment-16276720
]
ASF GitHub Bot commented on WW-4034:
------------------------------------
lukaszlenart closed pull request #47: WW-4034 Adds example for how customizing
JSONWriter
URL: https://github.com/apache/struts-site/pull/47
This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:
As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):
diff --git a/source/plugins/json/index.md b/source/plugins/json/index.md
index 401dc60d..43e016de 100644
--- a/source/plugins/json/index.md
+++ b/source/plugins/json/index.md
@@ -380,6 +380,49 @@ The implementation should then be defined in `struts.xml`
like:
</struts>
```
+There is an example at
[struts-examples/json-customize/FlexJSONWriter.java](https://gitbox.apache.org/repos/asf?p=struts-examples.git;a=blob_plain;f=json-customize/src/main/java/org/demo/FlexJSONWriter.java;hb=HEAD).
+It replaces Struts default json serializer with
[Flexjson](http://flexjson.sourceforge.net/) as below:
+
+```java
+import flexjson.JSONSerializer;
+import flexjson.transformer.DateTransformer;
+import org.apache.struts2.json.JSONException;
+import org.apache.struts2.json.JSONWriter;
+
+public class FlexJSONWriter implements JSONWriter {
+ private String dateFormatter;
+
+ public String write(Object object) throws JSONException {
+ return this.write(object, null, null, false);
+ }
+
+ public String write(Object object, Collection<Pattern> excludeProperties,
Collection<Pattern> includeProperties,
+ boolean excludeNullProperties) throws JSONException {
+
+ JSONSerializer serializer = new JSONSerializer();
+ if (excludeProperties != null) {
+ for (Pattern p : excludeProperties) {
+ serializer = serializer.exclude(p.pattern());
+ }
+ }
+ if (includeProperties != null) {
+ for (Pattern p : includeProperties) {
+ serializer = serializer.include(p.pattern());
+ }
+ }
+ if (excludeNullProperties) {
+ serializer = serializer.transform(new ExcludeTransformer(),
void.class);
+ }
+ if (dateFormatter != null) {
+ serializer = serializer.transform(new
DateTransformer(dateFormatter), Date.class);
+ }
+ return serializer.serialize(object);
+ }
+ //...
+```
+
+> Flexjson is a lightweight library for serializing and deserializing Java
objects into and from JSON.
+
## Example
### Setup Action
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> Allow to use custom JSONwriter
> ------------------------------
>
> Key: WW-4034
> URL: https://issues.apache.org/jira/browse/WW-4034
> Project: Struts 2
> Issue Type: Improvement
> Components: Plugin - JSON
> Reporter: Emir Buğra KÖKSALAN
> Priority: Minor
> Labels: JSON
> Fix For: 2.5.14
>
>
> Throws when accessing to a private inner class in that method:
> private void map(Map map, Method method) throws JSONException
> May be pass when trying to access a private class. example source code should
> be:
> {code:java}
> private void map(Map map, Method method) throws JSONException {
> this.add("{");
> ...
> while (it.hasNext()) {
> Map.Entry entry = (Map.Entry) it.next();
> Object key = entry.getKey();
> String expr = null;
> if (this.buildExpr) {
> try {
> if (key == null) {
> LOG.error("Cannot build expression for null key in " +
> this.exprStack);
> continue;
> } else {
> expr = this.expandExpr(key.toString());
> if (this.shouldExcludeProperty(expr)) {
> continue;
> }
> expr = this.setExprStack(expr);
> }
> }
> catch (Exception ex) {
> LOG.error("Error: " + ex.getLocalizedMessage());
> continue;
> }
> }
> if (hasData) {
> this.add(',');
> }
> ...
> this.add("}");
> }
> {code}
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