ProductLinkTag.java

package org.onehippo.forge.konakart.hst.tags;

import org.hippoecm.hst.content.beans.query.HstQuery;
import org.hippoecm.hst.content.beans.query.HstQueryManager;
import org.hippoecm.hst.content.beans.query.HstQueryResult;
import org.hippoecm.hst.content.beans.query.exceptions.QueryException;
import org.hippoecm.hst.content.beans.query.filter.Filter;
import org.hippoecm.hst.content.beans.standard.HippoBean;
import org.hippoecm.hst.core.component.HstRequest;
import org.hippoecm.hst.core.request.HstRequestContext;
import org.hippoecm.hst.tag.HstLinkTag;
import org.hippoecm.hst.util.HstRequestUtils;
import org.onehippo.forge.konakart.common.KKCndConstants;
import org.onehippo.forge.konakart.hst.beans.KKProductDocument;
import org.onehippo.forge.konakart.hst.utils.KKUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagData;
import javax.servlet.jsp.tagext.TagExtraInfo;
import javax.servlet.jsp.tagext.VariableInfo;

public class ProductLinkTag extends HstLinkTag {

  private Logger log = LoggerFactory.getLogger(ProductLinkTag.class);

  private int productId;

  public void setProductId(int productId) {
    this.productId = productId;
  }

  @Override
  public int doStartTag() throws JspException {

    try {
      HttpServletRequest servletRequest = (HttpServletRequest) pageContext.getRequest();
      HstRequest hstRequest = HstRequestUtils.getHstRequest(servletRequest);
      HstRequestContext requestContext = hstRequest.getRequestContext();

      HstQueryManager queryManager = KKUtil.getQueryManager(requestContext);

      HippoBean scope = KKUtil.getSiteContentBaseBean(hstRequest);

      HstQuery hstQuery = queryManager.createQuery(scope, KKProductDocument.class);
      Filter filter = hstQuery.createFilter();
      filter.addEqualTo(KKCndConstants.PRODUCT_ID, (long) productId);

      hstQuery.setFilter(filter);

      HstQueryResult queryResult = hstQuery.execute();

      // No result
      if (queryResult.getTotalSize() != 0) {
        if (linkForAttributeSet) {
          log.warn("Incorrect usage of hst:link tag. Not allowed to specifcy two of the attributes 'link', 'hippobean', 'path' or 'siteMapItemRefId' at same time. Ignore the attr hippoBean '{}'", hippoBean.getPath());
        } else {
          linkForAttributeSet = true;
          HippoBean hippoBean1 = queryResult.getHippoBeans().next();

          this.link = requestContext.getHstLinkCreator().create(
              hippoBean1.getNode(), requestContext, preferSiteMapItem, fallback, navigationStateful);

        }
      }
    } catch (QueryException e) {
      log.error("Failed to find the Hippo product document for the productId {} - {}", productId, e.toString());
    }


    return super.doStartTag();


  }

  /**
   * TagExtraInfo class for HstURLTag.
   */
  public static class TEI extends TagExtraInfo {

    public VariableInfo[] getVariableInfo(TagData tagData) {
      VariableInfo vi[] = null;
      String var = tagData.getAttributeString("var");
      if (var != null) {
        vi = new VariableInfo[1];
        vi[0] =
            new VariableInfo(var, "java.lang.String", true,
                VariableInfo.AT_BEGIN);
      }
      return vi;
    }

  }


}