com.ouyangzn.github.json.DoubleAdapter.java Source code

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Here is the source code for com.ouyangzn.github.json.DoubleAdapter.java

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/*
 * Copyright (c) 2016.  ouyangzn   <ouyangzn@163.com>
 * 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 com.ouyangzn.github.json;

import com.google.gson.JsonSyntaxException;
import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;
import java.io.IOException;

/**
 * Double?
 */
public class DoubleAdapter extends TypeAdapter<Number> {
    @Override
    public void write(JsonWriter jsonWriter, Number number) throws IOException {
        if (number == null) {
            jsonWriter.nullValue();
            return;
        }
        jsonWriter.value(number);
    }

    @Override
    public Number read(JsonReader jsonReader) throws IOException {
        if (jsonReader.peek() == JsonToken.NULL) {
            jsonReader.nextNull();
            return null;
        }

        try {
            String value = jsonReader.nextString();
            if ("".equals(value)) {
                return null;
            }
            return Double.parseDouble(value);
        } catch (NumberFormatException e) {
            throw new JsonSyntaxException(e);
        }
    }
}