Tag.java

/**
 * Copyright 2016 Hortonworks.
 *
 * 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.hortonworks.registries.tag;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.hortonworks.registries.common.Schema;
import com.hortonworks.registries.storage.PrimaryKey;
import com.hortonworks.registries.storage.catalog.AbstractStorable;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Represents a tag that can be associated with any storable entitiy.
 */
public class Tag extends AbstractStorable {
    public static final String NAMESPACE = "tag";
    public static final String ID = "id";
    public static final String NAME = "name";
    public static final String DESCRIPTION = "description";
    public static final String TIMESTAMP = "timestamp";

    private Long id;
    private String name;
    private String description = "";
    private Long timestamp;
    // parent tags
    private List<Tag> tags;

    @JsonIgnore
    @Override
    public String getNameSpace() {
        return NAMESPACE;
    }

    @JsonIgnore
    @Override
    public PrimaryKey getPrimaryKey() {
        Map<Schema.Field, Object> fieldToObjectMap = new HashMap<>();
        fieldToObjectMap.put(new Schema.Field("id", Schema.Type.LONG), this.id);
        return new PrimaryKey(fieldToObjectMap);
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public Long getTimestamp() {
        return timestamp;
    }

    public void setTimestamp(Long timestamp) {
        this.timestamp = timestamp;
    }

    public List<Tag> getTags() {
        return tags;
    }

    public void setTags(List<Tag> tags) {
        this.tags = tags;
    }

    @JsonIgnore
    public Schema getSchema() {
        return Schema.of(
                new Schema.Field(ID, Schema.Type.LONG),
                new Schema.Field(NAME, Schema.Type.STRING),
                new Schema.Field(DESCRIPTION, Schema.Type.STRING),
                new Schema.Field(TIMESTAMP, Schema.Type.LONG)
        );
    }

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

        Tag tag = (Tag) o;

        return id != null ? id.equals(tag.id) : tag.id == null;

    }

    @Override
    public int hashCode() {
        return id != null ? id.hashCode() : 0;
    }

    @Override
    public String toString() {
        return "Tag{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", description='" + description + '\'' +
                "}";
    }
}