erik/JSON-java
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* Updates array constructor and bulk operations to best guess capacity information

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* Update JSONObject to allow best guess for initial capacity.
This commit is contained in:
John J. Aylward 2017-06-08 11:22:23 -04:00
parent ef7a5e40be
commit 9c092753b0
3 changed files with 25 additions and 7 deletions
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13
JSONArray.java
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@ -154,7 +154,7 @@ public class JSONArray implements Iterable<Object> {
* A Collection.
*/
public JSONArray(Collection<?> collection) {
this.myArrayList = new ArrayList<Object>();
this.myArrayList = new ArrayList<Object>(collection == null ? 0 : collection.size());
if (collection != null) {
for (Object o: collection){
this.myArrayList.add(JSONObject.wrap(o));
@ -172,6 +172,7 @@ public class JSONArray implements Iterable<Object> {
this();
if (array.getClass().isArray()) {
int length = Array.getLength(array);
this.myArrayList.ensureCapacity(length);
for (int i = 0; i < length; i += 1) {
this.put(JSONObject.wrap(Array.get(array, i)));
}
@ -495,7 +496,7 @@ public class JSONArray implements Iterable<Object> {
* Get the optional object value associated with an index.
*
* @param index
* The index must be between 0 and length() - 1.
* The index must be between 0 and length() - 1. If not, null is returned.
* @return An object value, or null if there is no object at that index.
*/
public Object opt(int index) {
@ -1150,7 +1151,13 @@ public class JSONArray implements Iterable<Object> {
}
if (index < this.length()) {
this.myArrayList.set(index, value);
} else if(index == this.length()){
// simple append
this.put(value);
} else {
// if we are inserting past the length, we want to grow the array all at once
// instead of incrementally.
this.myArrayList.ensureCapacity(index + 1);
while (index != this.length()) {
this.put(JSONObject.NULL);
}
@ -1302,7 +1309,7 @@ public class JSONArray implements Iterable<Object> {
if (names == null || names.length() == 0 || this.length() == 0) {
return null;
}
JSONObject jo = new JSONObject();
JSONObject jo = new JSONObject(names.length());
for (int i = 0; i < names.length(); i += 1) {
jo.put(names.getString(i), this.opt(i));
}