@Test
public void testTaglibsAreIsolate() {
    List<TaglibDescriptor> taglibs = new ArrayList<>();
    taglibs.add(new TaglibDescriptorImpl("location", "uri"));
    List<JspPropertyGroupDescriptor> propertyGroups = Collections.emptyList();
    JspConfigDescriptor descriptor = new JspConfigDescriptorImpl(propertyGroups, taglibs);
    descriptor.getTaglibs().clear();
    Assert.assertEquals(taglibs, descriptor.getTaglibs());
}
 

@Test
public void testPropertyGroupsAreIsolate() {
    List<TaglibDescriptor> taglibs = Collections.emptyList();
    List<JspPropertyGroupDescriptor> propertyGroups = new ArrayList<>();
    propertyGroups.add(new JspPropertyGroupDescriptorImpl(new JspPropertyGroup()));
    JspConfigDescriptor descriptor = new JspConfigDescriptorImpl(propertyGroups, taglibs);
    descriptor.getJspPropertyGroups().clear();
    Assert.assertEquals(propertyGroups, descriptor.getJspPropertyGroups());
}
 

public JspConfigDescriptorImpl(Collection<JspPropertyGroupDescriptor> jspPropertyGroups,
                               Collection<TaglibDescriptor> taglibs) {
    this.jspPropertyGroups = jspPropertyGroups;
    this.taglibs = taglibs;
}
 

@Override
public Collection<TaglibDescriptor> getTaglibs() {
    return new ArrayList<>(taglibs);
}
 

/**
 * Scan for TLDs defined in <jsp-config>.
 * @throws IOException Error reading resources
 * @throws SAXException XML parsing error
 */
protected void scanJspConfig() throws IOException, SAXException {
    JspConfigDescriptor jspConfigDescriptor = context.getJspConfigDescriptor();
    if (jspConfigDescriptor == null) {
        return;
    }

    Collection<TaglibDescriptor> descriptors = jspConfigDescriptor.getTaglibs();
    for (TaglibDescriptor descriptor : descriptors) {
        String taglibURI = descriptor.getTaglibURI();
        String resourcePath = descriptor.getTaglibLocation();
        // Note: Whilst the Servlet 2.4 DTD implies that the location must
        // be a context-relative path starting with '/', JSP.7.3.6.1 states
        // explicitly how paths that do not start with '/' should be
        // handled.
        if (!resourcePath.startsWith("/")) {
            resourcePath = WEB_INF + resourcePath;
        }
        if (uriTldResourcePathMap.containsKey(taglibURI)) {
            log.warn(Localizer.getMessage(MSG + ".webxmlSkip",
                    resourcePath,
                    taglibURI));
            continue;
        }

        if (log.isTraceEnabled()) {
            log.trace(Localizer.getMessage(MSG + ".webxmlAdd",
                    resourcePath,
                    taglibURI));
        }

        URL url = context.getResource(resourcePath);
        if (url != null) {
            TldResourcePath tldResourcePath;
            if (resourcePath.endsWith(".jar")) {
                // if the path points to a jar file, the TLD is presumed to be
                // inside at META-INF/taglib.tld
                tldResourcePath = new TldResourcePath(url, resourcePath, "META-INF/taglib.tld");
            } else {
                tldResourcePath = new TldResourcePath(url, resourcePath);
            }
            // parse TLD but store using the URI supplied in the descriptor
            TaglibXml tld = tldParser.parse(tldResourcePath);
            uriTldResourcePathMap.put(taglibURI, tldResourcePath);
            tldResourcePathTaglibXmlMap.put(tldResourcePath, tld);
            if (tld.getListeners() != null) {
                listeners.addAll(tld.getListeners());
            }
        } else {
            log.warn(Localizer.getMessage(MSG + ".webxmlFailPathDoesNotExist",
                    resourcePath,
                    taglibURI));
            continue;
        }
    }
}
 

/**
 * Get the taglib entries from web.xml and add them to the map.
 * 
 * This is not kept in sync with o.a.j.compiler.TldLocationsCache as this
 * code needs to scan the TLDs listed in web.xml whereas Jasper only needs
 * the URI to TLD mappings.
 */
private void tldScanWebXml() {
    
    if (log.isTraceEnabled()) {
        log.trace(sm.getString("tldConfig.webxmlStart"));
    }

    Collection<TaglibDescriptor> descriptors =
        context.getJspConfigDescriptor().getTaglibs();

    for (TaglibDescriptor descriptor : descriptors) {
        String resourcePath = descriptor.getTaglibLocation();
        // Note: Whilst the Servlet 2.4 DTD implies that the location must
        // be a context-relative path starting with '/', JSP.7.3.6.1 states
        // explicitly how paths that do not start with '/' should be
        // handled.
        if (!resourcePath.startsWith("/")) {
            resourcePath = WEB_INF + resourcePath;
        }
        if (taglibUris.contains(descriptor.getTaglibURI())) {
            log.warn(sm.getString("tldConfig.webxmlSkip", resourcePath,
                    descriptor.getTaglibURI()));
        } else {
            if (log.isTraceEnabled()) {
                log.trace(sm.getString("tldConfig.webxmlAdd", resourcePath,
                        descriptor.getTaglibURI()));
            }
            InputStream stream = null;
            try {
                stream = context.getServletContext().getResourceAsStream(
                        resourcePath);
                if (stream != null) {
                    XmlErrorHandler handler = tldScanStream(stream);
                    handler.logFindings(log, resourcePath);
                    taglibUris.add(descriptor.getTaglibURI());
                    webxmlTaglibUris.add(descriptor.getTaglibURI());
                } else {
                    log.warn(sm.getString("tldConfig.webxmlFailPathDoesNotExist", resourcePath,
                            descriptor.getTaglibURI()));
                }
            } catch (IOException ioe) {
                log.warn(sm.getString("tldConfig.webxmlFail", resourcePath,
                        descriptor.getTaglibURI()), ioe);
            } finally {
                if (stream != null) {
                    try {
                        stream.close();
                    } catch (Throwable t) {
                        ExceptionUtils.handleThrowable(t);
                    }
                }
            }
        }
    }
}
 

@Override
public Collection<TaglibDescriptor> getTaglibs() {
    return taglibs;
}
 

/**
 * Get the taglib entries from web.xml and add them to the map.
 * 
 * This is not kept in sync with o.a.j.compiler.TldLocationsCache as this
 * code needs to scan the TLDs listed in web.xml whereas Jasper only needs
 * the URI to TLD mappings.
 */
private void tldScanWebXml() {
    
    if (log.isTraceEnabled()) {
        log.trace(sm.getString("tldConfig.webxmlStart"));
    }

    Collection<TaglibDescriptor> descriptors =
        context.getJspConfigDescriptor().getTaglibs();

    for (TaglibDescriptor descriptor : descriptors) {
        String resourcePath = descriptor.getTaglibLocation();
        // Note: Whilst the Servlet 2.4 DTD implies that the location must
        // be a context-relative path starting with '/', JSP.7.3.6.1 states
        // explicitly how paths that do not start with '/' should be
        // handled.
        if (!resourcePath.startsWith("/")) {
            resourcePath = WEB_INF + resourcePath;
        }
        if (taglibUris.contains(descriptor.getTaglibURI())) {
            log.warn(sm.getString("tldConfig.webxmlSkip", resourcePath,
                    descriptor.getTaglibURI()));
        } else {
            if (log.isTraceEnabled()) {
                log.trace(sm.getString("tldConfig.webxmlAdd", resourcePath,
                        descriptor.getTaglibURI()));
            }
            InputStream stream = null;
            try {
                stream = context.getServletContext().getResourceAsStream(
                        resourcePath);
                if (stream != null) {
                    XmlErrorHandler handler = tldScanStream(stream);
                    handler.logFindings(log, resourcePath);
                    taglibUris.add(descriptor.getTaglibURI());
                    webxmlTaglibUris.add(descriptor.getTaglibURI());
                } else {
                    log.warn(sm.getString("tldConfig.webxmlFailPathDoesNotExist", resourcePath,
                            descriptor.getTaglibURI()));
                }
            } catch (IOException ioe) {
                log.warn(sm.getString("tldConfig.webxmlFail", resourcePath,
                        descriptor.getTaglibURI()), ioe);
            } finally {
                if (stream != null) {
                    try {
                        stream.close();
                    } catch (Throwable t) {
                        ExceptionUtils.handleThrowable(t);
                    }
                }
            }
        }
    }
}
 

@Override
public Collection<TaglibDescriptor> getTaglibs() {
    return taglibs;
}
 

public JspConfigDescriptorImpl(Collection<TaglibDescriptor> taglibs,
           Collection<JspPropertyGroupDescriptor> jspPropertyGroups) {
   this.taglibs = taglibs;
   this.jspPropertyGroups = jspPropertyGroups;
}
 

public Collection<TaglibDescriptor> getTaglibs() {
    return this.taglibs;
}
 

private void processWebDotXml() throws Exception {


        // Skip if we are only looking for listeners
        if (scanListeners) {
            return;
        }

        JspConfigDescriptor jspConfig = ctxt.getJspConfigDescriptor();
        if (jspConfig == null) {
            return;
        }

        for (TaglibDescriptor taglib: jspConfig.getTaglibs()) {

            if (taglib == null) {
                continue;
            }
            String tagUri = taglib.getTaglibURI();
            String tagLoc = taglib.getTaglibLocation();
            if (tagUri == null || tagLoc == null) {
                continue;
            }
            // Ignore system tlds in web.xml, for backward compatibility
            if (systemUris.contains(tagUri)
                        || (!useMyFaces && systemUrisJsf.contains(tagUri))) {
                continue;
            }
            // Save this location if appropriate
            if (uriType(tagLoc) == NOROOT_REL_URI)
                    tagLoc = "/WEB-INF/" + tagLoc;
            String tagLoc2 = null;
            if (tagLoc.endsWith(JAR_FILE_SUFFIX)) {
                tagLoc = ctxt.getResource(tagLoc).toString();
                tagLoc2 = "META-INF/taglib.tld";
            }
            if (log.isLoggable(Level.FINE)) {
                log.fine( "Add tld map from web.xml: " + tagUri + "=>" + tagLoc+ "," + tagLoc2);
            }
            mappings.put(tagUri, new String[] { tagLoc, tagLoc2 });
        }
    }