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Clean up parsing of /reader/feeds response and work around problems with empty-named root folder.

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ojiikun 2013-04-09 09:02:22 +00:00
parent 9707b2faf2
commit 3ff10b9668
1 changed files with 32 additions and 20 deletions
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52
media/android/NewsBlur/src/com/newsblur/network/domain/FeedFolderResponse.java
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@ -8,6 +8,7 @@ import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
import android.util.Log;
import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
@ -35,10 +36,10 @@ public class FeedFolderResponse {
}
public FeedFolderResponse(String json, Gson gson) {
// This is a mess but I don't see a way to parse the mixed content in
// folders w/o going to low level Gson API
JsonParser parser = new JsonParser();
JsonObject asJsonObject = parser.parse(json).getAsJsonObject();
JsonArray jsonFoldersArray = (JsonArray) asJsonObject.get("folders");
ArrayList<String> nestedFolderList = new ArrayList<String>();
folders = new HashMap<String, List<Long>>();
@ -82,34 +83,43 @@ public class FeedFolderResponse {
}
}
private void parseFeed(JsonObject asJsonObject2, List<String> parentFeedNames, Map<String, List<Long>> folders) {
Set<Entry<String, JsonElement>> entrySet = asJsonObject2.entrySet();
Iterator<Entry<String, JsonElement>> iterator = entrySet.iterator();
while(iterator.hasNext()) {
Entry<String, JsonElement> next = iterator.next();
String key = next.getKey();
JsonArray value = (JsonArray) next.getValue();
parseFeedArray(parentFeedNames, folders, key, value);
}
}
private void parseFeedArray(List<String> nestedFolderList,
/**
* Parses a folder, which is a list of feeds and/or more folders. Nested folders
* are flattened into a single list, with names that are heirarchical.
*
* @param nestedFolderList a list of any parent folders that surrounded this folder.
* @param folders the sink
* @param name the name of this folder.
* @param arrayValue the actual contents to be parsed.
*/
private void parseFeedArray(List<String> nestedFolderList,
Map<String, List<Long>> folders, String name, JsonArray arrayValue) {
// determine our text name, like "grandparent - parent - me"
String fullFolderName = getFolderName(name, nestedFolderList);
// sink for any feeds found in this folder
ArrayList<Long> feedIds = new ArrayList<Long>();
for(int k=0;k<arrayValue.size();k++) {
JsonElement jsonElement = arrayValue.get(k);
for (JsonElement jsonElement : arrayValue) {
// a folder array contains either feed IDs or nested folder objects
if(jsonElement.isJsonPrimitive()) {
feedIds.add(jsonElement.getAsLong());
} else {
List<String> nestedFolerListCopy = new ArrayList<String>(nestedFolderList);
// if it wasn't a feed ID, it is a nested folder object
Set<Entry<String, JsonElement>> entrySet = ((JsonObject) jsonElement).entrySet();
List<String> nestedFolderListCopy = new ArrayList<String>(nestedFolderList);
if(name != null) {
nestedFolerListCopy.add(name);
nestedFolderListCopy.add(name);
}
parseFeed((JsonObject) jsonElement, nestedFolerListCopy, folders);
// recurse - nested folders are just objects with (usually one) field named for the folder
// that is a list of contained feeds or additional folders
for (Entry<String, JsonElement> next : entrySet) {
parseFeedArray( nestedFolderListCopy, folders, next.getKey(), (JsonArray) next.getValue() );
}
}
}
folders.put(fullFolderName, feedIds);
Log.d( this.getClass().getName(), "parsed folder '" + fullFolderName + "' with " + feedIds.size() + " feeds" );
}
private String getFolderName(String key, List<String> parentFeedNames) {
@ -120,7 +130,9 @@ public class FeedFolderResponse {
}
if(key != null) {
builder.append(key);
}
} else {
builder.append(" (no folder)");
}
return builder.toString();
}