io.nats.client.api.ObjectMetaOptions Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jnats Show documentation
Client library for working with the NATS messaging system.
There is a newer version: 2.20.5
// Copyright 2022 The NATS Authors
// 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 io.nats.client.api;

import io.nats.client.support.JsonSerializable;
import io.nats.client.support.JsonUtils;
import io.nats.client.support.JsonValue;

import static io.nats.client.support.ApiConstants.LINK;
import static io.nats.client.support.ApiConstants.MAX_CHUNK_SIZE;
import static io.nats.client.support.JsonUtils.beginJson;
import static io.nats.client.support.JsonUtils.endJson;
import static io.nats.client.support.JsonValueUtils.readInteger;
import static io.nats.client.support.JsonValueUtils.readValue;

/**
 * The ObjectMeta is Object Meta is high level information about an object.
 */
public class ObjectMetaOptions implements JsonSerializable {

    private final ObjectLink link;
    private final int chunkSize;

    private ObjectMetaOptions(Builder b) {
        link = b.link;
        chunkSize = b.chunkSize;
    }

    ObjectMetaOptions(JsonValue vOptions) {
        link = ObjectLink.optionalInstance(readValue(vOptions, LINK));
        chunkSize = readInteger(vOptions, MAX_CHUNK_SIZE, -1);
    }

    @Override
    public String toJson() {
        StringBuilder sb = beginJson();
        JsonUtils.addField(sb, LINK, link);
        JsonUtils.addField(sb, MAX_CHUNK_SIZE, chunkSize);
        return endJson(sb).toString();
    }

    boolean hasData() {
        return link != null || chunkSize > 0;
    }

    public ObjectLink getLink() {
        return link;
    }

    public int getChunkSize() {
        return chunkSize;
    }

    static Builder builder() {
        return new Builder();
    }

    static Builder builder(ObjectMetaOptions om) {
        return new Builder(om);
    }

    public static class Builder {
        ObjectLink link;
        int chunkSize;

        public Builder() {}

        public Builder(ObjectMetaOptions om) {
            link = om.link;
            chunkSize = om.chunkSize;
        }

        public Builder link(ObjectLink link) {
            this.link = link;
            return this;
        }

        public Builder chunkSize(int chunkSize) {
            this.chunkSize = chunkSize;
            return this;
        }

        public ObjectMetaOptions build() {
            return new ObjectMetaOptions(this);
        }
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        ObjectMetaOptions options = (ObjectMetaOptions) o;

        if (chunkSize != options.chunkSize) return false;
        return link != null ? link.equals(options.link) : options.link == null;
    }

    @Override
    public int hashCode() {
        int result = link != null ? link.hashCode() : 0;
        result = 31 * result + chunkSize;
        return result;
    }

    @Override
    public String toString() {
        return "ObjectMetaOptions{" +
            "link=" + link +
            ", chunkSize=" + chunkSize +
            '}';
    }
}