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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.kelar.inputmethod.latin.utils;
import android.util.JsonReader;
import android.util.JsonWriter;
import android.util.Log;
import java.io.Closeable;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public final class JsonUtils {
private static final String TAG = JsonUtils.class.getSimpleName();
private static final String INTEGER_CLASS_NAME = Integer.class.getSimpleName();
private static final String STRING_CLASS_NAME = String.class.getSimpleName();
private static final String EMPTY_STRING = "";
public static List<Object> jsonStrToList(final String s) {
final ArrayList<Object> list = new ArrayList<>();
final JsonReader reader = new JsonReader(new StringReader(s));
try {
reader.beginArray();
while (reader.hasNext()) {
reader.beginObject();
while (reader.hasNext()) {
final String name = reader.nextName();
if (name.equals(INTEGER_CLASS_NAME)) {
list.add(reader.nextInt());
} else if (name.equals(STRING_CLASS_NAME)) {
list.add(reader.nextString());
} else {
Log.w(TAG, "Invalid name: " + name);
reader.skipValue();
}
}
reader.endObject();
}
reader.endArray();
return list;
} catch (final IOException e) {
} finally {
close(reader);
}
return Collections.<Object>emptyList();
}
public static String listToJsonStr(final List<Object> list) {
if (list == null || list.isEmpty()) {
return EMPTY_STRING;
}
final StringWriter sw = new StringWriter();
final JsonWriter writer = new JsonWriter(sw);
try {
writer.beginArray();
for (final Object o : list) {
writer.beginObject();
if (o instanceof Integer) {
writer.name(INTEGER_CLASS_NAME).value((Integer)o);
} else if (o instanceof String) {
writer.name(STRING_CLASS_NAME).value((String)o);
}
writer.endObject();
}
writer.endArray();
return sw.toString();
} catch (final IOException e) {
} finally {
close(writer);
}
return EMPTY_STRING;
}
private static void close(final Closeable closeable) {
try {
if (closeable != null) {
closeable.close();
}
} catch (final IOException e) {
// Ignore
}
}
}
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