package gov.uspto.patent.validate;

import java.util.StringTokenizer;

import gov.uspto.patent.model.Patent;
import gov.uspto.patent.model.PatentType;

/**
 * Patent Abstract Rule for Utility Patents
 * 
 * <p>
 * 
 * <pre>
 * 1) Abstract Field Exists
 * 2) Abstract length more than 10 characters
 * 3) Abstract length less than 150 words
 * </pre>
 * </p>
 * 
 * DESIGN Patents only require 1 claim, abstract and description are optional.
 * UTILITY Patents (majority of patents) require 1 or more claims, and usually
 * have an abstract and description.
 *
 */
public class AbstractRule implements Validator<Patent> {

	private static String NAME = "Abstact";
	private static String MESSAGE = "Utility Patent ABSTRACT field: missing or failed size constraints";

	@Override
	public boolean test(Patent patent) {
		if (PatentType.UTILITY.equals(patent.getPatentType())) {

			StringTokenizer tokenizer = tokenize(patent.getAbstract().getPlainText());

			if (patent.getAbstract() == null || patent.getAbstract().getPlainText().length() < 10
					|| tokenizer.countTokens() > 150) {
				return false;
			}
		}
		return true;
	}

	@Override
	public String getName() {
		return NAME;
	}

	@Override
	public String getMessage() {
		return MESSAGE;
	}

	public StringTokenizer tokenize(String text) {
		return new StringTokenizer(text.trim(), " \t\n\r\f,:;?![]()'");
	}
}