package tk.eclipse.plugin.jspeditor.editors;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import jp.aonir.fuzzyxml.FuzzyXMLDocument;
import jp.aonir.fuzzyxml.FuzzyXMLElement;
import jp.aonir.fuzzyxml.FuzzyXMLNode;
import jp.aonir.fuzzyxml.FuzzyXMLParser;
import jp.aonir.fuzzyxml.XPath;
import org.eclipse.jface.preference.IPreferenceStore;
import tk.eclipse.plugin.htmleditor.HTMLPlugin;
import tk.eclipse.plugin.htmleditor.HTMLUtil;
import tk.eclipse.plugin.htmleditor.gefutils.IJarVisitor;
import tk.eclipse.plugin.htmleditor.gefutils.JarAcceptor;
/**
* Provides one static method to get TLD files.
*/
public class TLDLoader {
private static HashMap<String, byte[]> cache = new HashMap<String, byte[]>();
/**
* Returns the TLD file as <code>InputStream</code>.
* <p>
* If the URL starts <code>http://</code>, this method tries to
* get the TLD file from the remote server.
* Otherwise, tries to get from the local path using given URI as
* the relative path from the base directory.
*
* @param basedir the base directory
* @param uri the URI of the TLD file
* @return <code>InputStream</code> of the TLD file
*/
public static InputStream get(File basedir,String uri) throws Exception {
if(cache.get(uri)==null){
// Default internal TLDs
Map innerTLD = HTMLPlugin.getInnerTLD();
if(innerTLD.get(uri)!=null){
InputStream in = TLDLoader.class.getResourceAsStream((String)innerTLD.get(uri));
byte[] bytes = HTMLUtil.readStream(in);
cache.put(uri,bytes);
return new ByteArrayInputStream(bytes);
}
// Contributed TLDs
ITLDLocator[] locators = HTMLPlugin.getDefault().getTLDLocatorContributions();
for ( int i = 0; i < locators.length; i++) {
InputStream in = locators[i].locateTLD(uri);
if ( in != null) {
byte[] bytes = HTMLUtil.readStream(in);
cache.put(uri,bytes);
return new ByteArrayInputStream(bytes);
}
}
// from PreferenceStore
Map pref = getPreferenceTLD();
if(pref.get(uri)!=null){
InputStream in = new FileInputStream(new File((String)pref.get(uri)));
byte[] bytes = HTMLUtil.readStream(in);
cache.put(uri,bytes);
return new ByteArrayInputStream(bytes);
}
// Check web.xml
byte[] bytes = getTLDFromWebXML(basedir,uri);
if(bytes!=null){
cache.put(uri,bytes);
return new ByteArrayInputStream(bytes);
}
if(uri.startsWith("http://") || uri.startsWith("https://")){
// Search META-INF in jar files
bytes = getTLDFromJars(basedir,uri);
if(bytes!=null){
cache.put(uri,bytes);
return new ByteArrayInputStream(bytes);
}
// from the URL
URL url = new URL(uri);
InputStream in = url.openStream();
cache.put(uri,HTMLUtil.readStream(in));
} else {
// from the local file
File file = new File(basedir,uri);
InputStream in = new FileInputStream(file);
cache.put(uri,HTMLUtil.readStream(in));
}
}
byte[] bytes = cache.get(uri);
return new ByteArrayInputStream(bytes);
}
/** Load configurations from <code>IPreferenceStore</code>. */
private static Map getPreferenceTLD(){
HashMap<String, String> map = new HashMap<String, String>();
IPreferenceStore store = HTMLPlugin.getDefault().getPreferenceStore();
String[] uri = store.getString(HTMLPlugin.PREF_TLD_URI).split("\n");
String[] path = store.getString(HTMLPlugin.PREF_TLD_PATH).split("\n");
for(int i=0;i<uri.length;i++){
if(!uri[i].trim().equals("") && !path[i].trim().equals("")){
map.put(uri[i].trim(),path[i].trim());
}
}
return map;
}
/** Load from web.xml */
private static byte[] getTLDFromWebXML(File basedir,String uri){
File webXML = new File(basedir,"/WEB-INF/web.xml");
if(webXML.exists() && webXML.isFile()){
try {
FuzzyXMLDocument doc = new FuzzyXMLParser(false).parse(new FileInputStream(webXML));
FuzzyXMLNode[] nodes = XPath.selectNodes(doc.getDocumentElement(),"/web-app/taglib|/web-app/jsp-config/taglib");
for(int i=0;i<nodes.length;i++){
FuzzyXMLElement element = (FuzzyXMLElement)nodes[i];
String taglibUri = HTMLUtil.getXPathValue(element,"/taglib-uri/child::text()");
String taglibLoc = HTMLUtil.getXPathValue(element,"/taglib-location/child::text()");
if(uri.equals(taglibUri)){
if(taglibLoc!=null && taglibLoc.endsWith(".tld")){
File file = new File(basedir,taglibLoc);
return HTMLUtil.readStream(new FileInputStream(file));
}
break;
}
}
} catch(Exception ex){
HTMLPlugin.logException(ex);
}
}
return null;
}
/** Load from META-INF in the jar file */
private static byte[] getTLDFromJars(File basedir,final String uri){
return (byte[])JarAcceptor.accept(basedir, new IJarVisitor(){
public Object visit(JarFile file, JarEntry entry) throws Exception {
if(entry.getName().endsWith(".tld")){
byte[] bytes = HTMLUtil.readStream(file.getInputStream(entry));
try {
FuzzyXMLDocument doc = new FuzzyXMLParser(false).parse(new ByteArrayInputStream(bytes));
String nodeURI = HTMLUtil.getXPathValue(doc.getDocumentElement(),"/taglib/uri/child::text()");
if(nodeURI!=null && uri.equals(nodeURI)){
return bytes;
}
} catch(Exception ex){
HTMLPlugin.logException(ex);
}
}
return null;
}
});
}
}