transformtag.java

来自「数据仓库展示程序」· Java 代码 · 共 99 行

/*
// $Id: //open/mondrian/src/main/mondrian/web/taglib/TransformTag.java#5 $
// This software is subject to the terms of the Common Public License
// Agreement, available at the following URL:
// http://www.opensource.org/licenses/cpl.html.
// (C) Copyright 2002-2005 Kana Software, Inc. and others.
// All Rights Reserved.
// You must accept the terms of that agreement to use this software.
//
// Andreas Voss, 22 March, 2002
*/
package mondrian.web.taglib;

import org.w3c.dom.Document;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;
import javax.xml.transform.Transformer;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

/**
 * A <code>TransformTag</code> renders the result of a {@link ResultCache}
 * object. Example:<blockquote>
 *
 * <pre>The current slicer is
 * &lt;transform query="query1"
 *    xsltURI="/WEB-INF/mdxslicer.xsl"
 *    xsltCache="true"/&gt;
 * &lt;br/&gt;
 * &lt;transform query="query1"
 *    xsltURI="/WEB-INF/mdxtable.xsl"
 *    xsltCache="false"/&gt;</pre>
 *
 * </blockquote>
 *
 * Attributes are
 * {@link #setQuery query},
 * {@link #setXsltURI xsltURI},
 * {@link #setXsltCache xsltCache}.
 **/

public class TransformTag extends TagSupport {

    public TransformTag() {
    }

    public int doEndTag() throws javax.servlet.jsp.JspException {
        try {
            ApplResources ar = ApplResources.getInstance(pageContext.getServletContext());
            ResultCache rc = ResultCache.getInstance(pageContext.getSession(), pageContext.getServletContext(), query);
            Document doc = rc.getDOM();
            // DOMBuilder.debug(doc);
            Transformer transformer = ar.getTransformer(xsltURI, xsltCache);
            transformer.transform(new DOMSource(doc), new StreamResult(pageContext.getOut()));
        }
        catch (Exception e) {
            e.printStackTrace();
            throw new JspException(e);
        }
        return EVAL_PAGE;
    }

    /** Sets the string attribute <code>query</code>, which is the name of a
     * query declared using the {@link QueryTag &lt;query&gt;} tag. **/
    public void setQuery(String newQuery) {
        query = newQuery;
    }
    public String getQuery() {
        return query;
    }

    /** Sets the string attribute <code>xsltURI</code>, which is the URI of an
     * XSL style-sheet to transform query output. **/
    public void setXsltURI(String newXsltURI) {
        xsltURI = newXsltURI;
    }
    public String getXsltURI() {
        return xsltURI;
    }

    /** Sets the boolean attribute <code>xsltCache</code>, which determines
     * whether to cache the parsed representation of an XSL style-sheet. **/
    public void setXsltCache(boolean newXsltCache) {
        xsltCache = newXsltCache;
    }
    public boolean isXsltCache() {
        return xsltCache;
    }

    private String query;
    private String xsltURI;
    private boolean xsltCache;


}

// End TransformTag.java