/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.config.types;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import javax.el.ELContext;
import javax.el.ELException;
import javax.el.ELResolver;
import com.caucho.config.Config;
import com.caucho.config.ConfigELContext;
import com.caucho.el.ELParser;
import com.caucho.el.Expr;
import com.caucho.el.MapVariableResolver;
import com.caucho.vfs.Path;
import com.caucho.vfs.Vfs;
/**
* Special builder for path variables.
*/
public class PathBuilder {
private String _userPath;
/**
* Sets the text.
*/
public void addText(RawString text)
{
_userPath = text.getValue().trim();
}
/**
* Replace with the real path.
*/
public Path replaceObject()
throws ELException
{
return lookupPath(_userPath, Config.getEnvironment());
}
public static Path lookupPath(String string)
throws ELException
{
return lookupPath(string, Config.getEnvironment());
}
public static Path lookupPath(String string, ArrayList<?> vars)
throws ELException
{
HashMap<String,Object> map = new HashMap<String,Object>();
map.put("regexp", vars);
return lookupPath(string, map);
}
public static Path lookupPath(String string, Map<String,Object> map)
throws ELException
{
ELContext context;
if (map != null) {
ELResolver resolver = new MapVariableResolver(map);
context = new ConfigELContext(resolver);
}
else
context = new ConfigELContext();
return lookupPath(string, context);
}
public static Path lookupPath(String string, ELContext env)
throws ELException
{
return lookupPath(string, env, Vfs.lookup());
}
public static Path lookupPath(String string, ELContext env, Path pwd)
throws ELException
{
if (env == null)
env = Config.getEnvironment();
string = rewritePathString(string);
Expr expr = new ELParser(env, string).parse();
Object obj = expr.evalObject(env);
if (obj instanceof Path)
return (Path) obj;
String value = Expr.toString(obj, env);
if (pwd != null)
return pwd.lookup(value);
else
return Vfs.lookup(value);
}
/**
* Rewrites the path string into proper JSP EL.
*
* Returns the native path for a configured path name. The special cases
* $app-dir and $resin-home specify the root directory.
*
* @return a real path corresponding to the path name
*/
public static String rewritePathString(String pathName)
{
StringBuilder cb = new StringBuilder();
int length = pathName.length();
for (int i = 0; i < length; i++) {
char ch = pathName.charAt(i);
if (ch != '$') {
cb.append(ch);
continue;
}
if (i + 1 == length) {
cb.append('$');
continue;
}
ch = pathName.charAt(i + 1);
if ('0' <= ch && ch <= '9') {
int value = 0;
for (i++;
i < length && (ch = pathName.charAt(i)) >= '0' && ch <= '9';
i++) {
value = 10 * value + ch - '0';
}
i--;
cb.append("${regexp[" + value + "]}");
}
else if ('a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z') {
int tail = i + 1;
for (; tail < length; tail++) {
ch = pathName.charAt(tail);
if (ch == '/' || ch == '\\' || ch == '$')
break;
}
// cb.append("${Var[\"" + pathName.substring(i + 1, tail) + "\"]}");
cb.append("${" + pathName.substring(i + 1, tail) + "}");
i = tail - 1;
}
else
cb.append('$');
}
return cb.toString();
}
}