keywhiz.api.ApiDate.java Source code

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Here is the source code for keywhiz.api.ApiDate.java

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/*
 * Copyright (C) 2015 Square, Inc.
 *
 * 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 keywhiz.api;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import java.io.IOException;
import java.time.Instant;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

import static java.lang.String.format;

/**
 * This is a wrapper for the date class used in API responses so we can have a custom JSON serializer and deserializer
 */
@JsonSerialize(using = ApiDate.ApiDateSerializer.class)
@JsonDeserialize(using = ApiDate.ApiDateDeserializer.class)
public class ApiDate {
    private long epochSecond;

    public long toEpochSecond() {
        return epochSecond;
    }

    public ApiDate(long epochSecond) {
        this.epochSecond = epochSecond;
    }

    static class ApiDateSerializer extends JsonSerializer<ApiDate> {
        private static DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");

        @Override
        public void serialize(ApiDate value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
            Instant i = Instant.ofEpochSecond(value.epochSecond);
            gen.writeString(formatter.format(i.atOffset(ZoneOffset.UTC)));
        }
    }

    static class ApiDateDeserializer extends JsonDeserializer<ApiDate> {
        @Override
        public ApiDate deserialize(JsonParser parser, DeserializationContext ctxt) throws IOException {
            OffsetDateTime odt = parser.readValueAs(OffsetDateTime.class);
            return new ApiDate(odt.toEpochSecond());
        }
    }

    public static ApiDate parse(String s) {
        OffsetDateTime odt = OffsetDateTime.parse(s);
        return new ApiDate(odt.toEpochSecond());
    }

    public static ApiDate now() {
        return new ApiDate(OffsetDateTime.now().toEpochSecond());
    }

    @Override
    public String toString() {
        return format("ApiDate[%d]", epochSecond);
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof ApiDate) {
            ApiDate that = (ApiDate) obj;
            return this.epochSecond == that.epochSecond;
        }
        return false;
    }

    @Override
    public int hashCode() {
        return Long.hashCode(this.epochSecond);
    }
}