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package org.openstack4j.openstack.common;

import org.openstack4j.model.common.Link;
import org.openstack4j.model.common.builder.LinkBuilder;

import com.google.common.base.Objects;

/**
 * A Link holds information about a URL, Relative URL and the type of the link
 * 
 * @author Jeremy Unruh
 */
public class GenericLink implements Link {

	private static final long serialVersionUID = 1L;
	
	private String rel;
	private String href;
	private String type;
	
	public GenericLink() { }
	
	public GenericLink(String rel, String href, String type) {
		this.rel = rel;
		this.type = type;
		this.href = href;
	}
	
	/**
	 * @return the link builder
	 */
	public static LinkBuilder builder() {
		return new LinkConcreteBuilder();
	}
	
	@Override
	public LinkBuilder toBuilder() {
		return new LinkConcreteBuilder(this);
	}
	
	/**
	 * @return the relative URL or null
	 */
	public String getRel() {
		return rel;
	}
	
	/**
	 * @return the href URL
	 */
	public String getHref() {
		return href;
	}
	
	/**
	 * @return the type of link or null
	 */
	public String getType() {
		return type;
	}
	
	/**
	 * {@inheritDoc}
	 */
	@Override
	public String toString() {
		return Objects.toStringHelper(this).omitNullValues()
						.add("href", href).add("rel", rel).add("type", type)
						.toString();
	}
	
	public static class LinkConcreteBuilder implements LinkBuilder {

		GenericLink model;
		
		LinkConcreteBuilder() {
			this(new GenericLink());
		}
		
		LinkConcreteBuilder(GenericLink link) {
			this.model = link;
		}
		
		/**
		 * @see GenericLink#getRel()
		 */
		public LinkConcreteBuilder rel(String rel) {
			model.rel = rel;
			return this;
		}
		
		/**
		 * @see GenericLink#getHref()
		 */
		public LinkConcreteBuilder href(String href) {
			model.href = href;
			return this;
		}
		
		/**
		 * @see GenericLink#getType()
		 */
		public LinkConcreteBuilder type(String type) {
			model.type = type;
			return this;
		}
		
		/**
		 * {@inheritDoc}
		 */
		@Override
		public Link build() {
			return model;
		}

		/**
		 * {@inheritDoc}
		 */
		@Override
		public LinkBuilder from(Link in) {
			this.model = (GenericLink)in;
			return this;
		}
	}
	
}




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