96 lines
3.2 KiB
Java
96 lines
3.2 KiB
Java
/*
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* Copyright (c) 2015-present, Parse, LLC.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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package com.parse;
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import android.os.Parcel;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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import org.json.JSONArray;
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import org.json.JSONException;
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import org.json.JSONObject;
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/**
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* An operation that adds a new element to an array field.
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*/
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/** package */ class ParseAddOperation implements ParseFieldOperation {
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/* package */ final static String OP_NAME = "Add";
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protected final ArrayList<Object> objects = new ArrayList<>();
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public ParseAddOperation(Collection<?> coll) {
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objects.addAll(coll);
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}
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@Override
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public JSONObject encode(ParseEncoder objectEncoder) throws JSONException {
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JSONObject output = new JSONObject();
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output.put("__op", OP_NAME);
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output.put("objects", objectEncoder.encode(objects));
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return output;
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}
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@Override
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public void encode(Parcel dest, ParseParcelEncoder parcelableEncoder) {
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dest.writeString(OP_NAME);
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dest.writeInt(objects.size());
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for (Object object : objects) {
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parcelableEncoder.encode(object, dest);
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}
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}
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@Override
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public ParseFieldOperation mergeWithPrevious(ParseFieldOperation previous) {
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if (previous == null) {
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return this;
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} else if (previous instanceof ParseDeleteOperation) {
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return new ParseSetOperation(objects);
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} else if (previous instanceof ParseSetOperation) {
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Object value = ((ParseSetOperation) previous).getValue();
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if (value instanceof JSONArray) {
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ArrayList<Object> result = ParseFieldOperations.jsonArrayAsArrayList((JSONArray) value);
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result.addAll(objects);
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return new ParseSetOperation(new JSONArray(result));
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} else if (value instanceof List) {
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ArrayList<Object> result = new ArrayList<>((List<?>) value);
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result.addAll(objects);
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return new ParseSetOperation(result);
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} else {
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throw new IllegalArgumentException("You can only add an item to a List or JSONArray.");
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}
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} else if (previous instanceof ParseAddOperation) {
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ArrayList<Object> result = new ArrayList<>(((ParseAddOperation) previous).objects);
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result.addAll(objects);
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return new ParseAddOperation(result);
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} else {
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throw new IllegalArgumentException("Operation is invalid after previous operation.");
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}
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}
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@Override
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public Object apply(Object oldValue, String key) {
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if (oldValue == null) {
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return objects;
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} else if (oldValue instanceof JSONArray) {
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ArrayList<Object> old = ParseFieldOperations.jsonArrayAsArrayList((JSONArray) oldValue);
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@SuppressWarnings("unchecked")
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ArrayList<Object> newValue = (ArrayList<Object>) this.apply(old, key);
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return new JSONArray(newValue);
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} else if (oldValue instanceof List) {
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ArrayList<Object> result = new ArrayList<>((List<?>) oldValue);
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result.addAll(objects);
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return result;
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} else {
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throw new IllegalArgumentException("Operation is invalid after previous operation.");
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}
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}
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}
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