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Retain sort order if object is an instance of SortedMap #91

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Retain sort order if object is an instance of SortedMap #91

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10 changes: 8 additions & 2 deletions JSONObject.java
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,8 @@ of this software and associated documentation files (the "Software"), to deal
import java.util.Map;
import java.util.ResourceBundle;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;

/**
* A JSONObject is an unordered collection of name/value pairs. Its external
Expand Down Expand Up @@ -240,7 +242,11 @@ public JSONObject(JSONTokener x) throws JSONException {
* @throws JSONException
*/
public JSONObject(Map map) {
this.map = new HashMap();
if (map instanceof SortedMap) {
this.map = new TreeMap(map);
} else {
this.map = new HashMap();
}
if (map != null) {
Iterator i = map.entrySet().iterator();
while (i.hasNext()) {
Expand All @@ -252,7 +258,7 @@ public JSONObject(Map map) {
}
}
}

/**
* Construct a JSONObject from an Object using bean getters. It reflects on
* all of the public methods of the object. For each of the methods with no
Expand Down
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