QueryBuilder.java

import demo.client.OrderTypeEnum;
import demo.client.SortTypeEnum;

/**
 * Created by Max Malakhov on 9/7/16.
 */
public class QueryBuilder {

    private static final String PARAM_SOURCE_TYPE = "?site=stackoverflow";

    private static final String PARAM_ORDER_TYPE = "order";
    private static final String PARAM_SORT_TYPE = "sort";
    private static final String PARAM_INTITLE = "intitle";

    private StringBuffer query;

    private QueryBuilder() {
        query = new StringBuffer();
        query.append(PARAM_SOURCE_TYPE);
    }

    public static QueryBuilder create() {
        return new QueryBuilder();
    }

    public QueryBuilder order(OrderTypeEnum type) {
        query.append(String.format("&%s=%s",PARAM_ORDER_TYPE, type.getValue()));
        return this;
    }

    public QueryBuilder sort(SortTypeEnum type) {
        query.append(String.format("&%s=%s",PARAM_SORT_TYPE, type.getValue()));
        return this;
    }

    public QueryBuilder intitle(String term) {
        query.append(String.format("&%s=%s", PARAM_INTITLE, term));
        return this;
    }

    public String build() {
        return query.toString();
    }
}