/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jasper.compiler;
import java.io.InputStream;
import java.util.Collection;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Set;
import java.util.Vector;
import javax.servlet.ServletContext;
import javax.servlet.jsp.tagext.FunctionInfo;
import javax.servlet.jsp.tagext.TagFileInfo;
import javax.servlet.jsp.tagext.TagInfo;
import javax.servlet.jsp.tagext.TagLibraryInfo;
import org.apache.jasper.Constants;
import org.apache.jasper.JasperException;
import org.apache.jasper.JspCompilationContext;
import org.apache.jasper.xmlparser.ParserUtils;
import org.apache.jasper.xmlparser.TreeNode;
/**
* Class responsible for generating an implicit tag library containing tag
* handlers corresponding to the tag files in "/WEB-INF/tags/" or a
* subdirectory of it.
*
* @author Jan Luehe
*/
class ImplicitTagLibraryInfo extends TagLibraryInfo {
private static final String WEB_INF_TAGS = "/WEB-INF/tags";
private static final String TAG_FILE_SUFFIX = ".tag";
private static final String TAGX_FILE_SUFFIX = ".tagx";
private static final String TAGS_SHORTNAME = "tags";
private static final String TLIB_VERSION = "1.0";
private static final String JSP_VERSION = "2.0";
private static final String IMPLICIT_TLD = "implicit.tld";
// Maps tag names to tag file paths
private Hashtable tagFileMap;
private ParserController pc;
private PageInfo pi;
private Vector vec;
/**
* Constructor.
*/
public ImplicitTagLibraryInfo(JspCompilationContext ctxt,
ParserController pc,
PageInfo pi,
String prefix,
String tagdir,
ErrorDispatcher err) throws JasperException {
super(prefix, null);
this.pc = pc;
this.pi = pi;
this.tagFileMap = new Hashtable();
this.vec = new Vector();
// Implicit tag libraries have no functions:
this.functions = new FunctionInfo[0];
tlibversion = TLIB_VERSION;
jspversion = JSP_VERSION;
if (!tagdir.startsWith(WEB_INF_TAGS)) {
err.jspError("jsp.error.invalid.tagdir", tagdir);
}
// Determine the value of the <short-name> subelement of the
// "imaginary" <taglib> element
if (tagdir.equals(WEB_INF_TAGS)
|| tagdir.equals( WEB_INF_TAGS + "/")) {
shortname = TAGS_SHORTNAME;
} else {
shortname = tagdir.substring(WEB_INF_TAGS.length());
shortname = shortname.replace('/', '-');
}
// Populate mapping of tag names to tag file paths
Set dirList = ctxt.getResourcePaths(tagdir);
if (dirList != null) {
Iterator it = dirList.iterator();
while (it.hasNext()) {
String path = (String) it.next();
if (path.endsWith(TAG_FILE_SUFFIX)
|| path.endsWith(TAGX_FILE_SUFFIX)) {
/*
* Use the filename of the tag file, without the .tag or
* .tagx extension, respectively, as the <name> subelement
* of the "imaginary" <tag-file> element
*/
String suffix = path.endsWith(TAG_FILE_SUFFIX) ?
TAG_FILE_SUFFIX : TAGX_FILE_SUFFIX;
String tagName = path.substring(path.lastIndexOf("/") + 1);
tagName = tagName.substring(0,
tagName.lastIndexOf(suffix));
tagFileMap.put(tagName, path);
} else if (path.endsWith(IMPLICIT_TLD)) {
InputStream in = null;
try {
in = ctxt.getResourceAsStream(path);
if (in != null) {
// Add implicit TLD to dependency list
if (pi != null) {
pi.addDependant(path);
}
ServletContext servletContext = ctxt.getServletContext();
boolean validate = Boolean.parseBoolean(
servletContext.getInitParameter(
Constants.XML_VALIDATION_TLD_INIT_PARAM));
String blockExternalString =
servletContext.getInitParameter(
Constants.XML_BLOCK_EXTERNAL_INIT_PARAM);
boolean blockExternal;
if (blockExternalString == null) {
blockExternal = true;
} else {
blockExternal = Boolean.parseBoolean(blockExternalString);
}
ParserUtils pu = new ParserUtils(validate, blockExternal);
TreeNode tld = pu.parseXMLDocument(uri, in);
if (tld.findAttribute("version") != null) {
this.jspversion = tld.findAttribute("version");
}
// Process each child element of our <taglib> element
Iterator list = tld.findChildren();
while (list.hasNext()) {
TreeNode element = (TreeNode) list.next();
String tname = element.getName();
if ("tlibversion".equals(tname) // JSP 1.1
|| "tlib-version".equals(tname)) { // JSP 1.2
this.tlibversion = element.getBody();
} else if ("jspversion".equals(tname)
|| "jsp-version".equals(tname)) {
this.jspversion = element.getBody();
} else if ("shortname".equals(tname) || "short-name".equals(tname)) {
// Ignore
} else {
// All other elements are invalid
err.jspError("jsp.error.invalid.implicit", path);
}
}
try {
double version = Double.parseDouble(this.jspversion);
if (version < 2.0) {
err.jspError("jsp.error.invalid.implicit.version", path);
}
} catch (NumberFormatException e) {
err.jspError("jsp.error.invalid.implicit.version", path);
}
}
} finally {
if (in != null) {
try {
in.close();
} catch (Throwable t) {
}
}
}
}
}
}
}
/**
* Checks to see if the given tag name maps to a tag file path,
* and if so, parses the corresponding tag file.
*
* @return The TagFileInfo corresponding to the given tag name, or null if
* the given tag name is not implemented as a tag file
*/
public TagFileInfo getTagFile(String shortName) {
TagFileInfo tagFile = super.getTagFile(shortName);
if (tagFile == null) {
String path = (String) tagFileMap.get(shortName);
if (path == null) {
return null;
}
TagInfo tagInfo = null;
try {
tagInfo = TagFileProcessor.parseTagFileDirectives(pc,
shortName,
path,
pc.getJspCompilationContext().getTagFileJarUrl(path),
this);
} catch (JasperException je) {
throw new RuntimeException(je.toString(), je);
}
tagFile = new TagFileInfo(shortName, path, tagInfo);
vec.addElement(tagFile);
this.tagFiles = new TagFileInfo[vec.size()];
vec.copyInto(this.tagFiles);
}
return tagFile;
}
public TagLibraryInfo[] getTagLibraryInfos() {
Collection coll = pi.getTaglibs();
return (TagLibraryInfo[]) coll.toArray(new TagLibraryInfo[0]);
}
}