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package com.sun.tools.jxc;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
import com.sun.tools.jxc.gen.config.NGCCRuntime;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
* Controls the validating and converting of values obtained
* from the config file.
*
* @author
* Bhakti Mehta (bhakti.mehta@sun.com)
*/
public final class NGCCRuntimeEx extends NGCCRuntime {
/**
* All the errors shall be sent to this object.
*/
private final ErrorHandler errorHandler;
public NGCCRuntimeEx(ErrorHandler errorHandler) {
this.errorHandler = errorHandler;
}
/**
* This will check if the baseDir provided by the user
* in the config file exists. If not it throws an error
* @param baseDir
* The baseDir attribute passed by the user in the xml config file as a path
* @return
* The file representation of the path name
*/
public File getBaseDir(String baseDir) throws SAXException {
File dir = new File(baseDir);
if (dir.exists()) {
return dir;
} else {
SAXParseException e = new SAXParseException(
Messages.BASEDIR_DOESNT_EXIST.format(dir.getAbsolutePath()),
getLocator());
errorHandler.error(e);
throw e; // we can't recover from this error
}
}
/**
* This takes the include list provided by the user in the config file
* It converts the user values to {@link Pattern}
* @param includeContent
* The include list specified by the user
* @return
* A list of regular expression patterns {@link Pattern}
*/
public List<Pattern> getIncludePatterns(List<String> includeContent ) {
List<Pattern> includeRegexList = new ArrayList<Pattern>();
for (String includes : includeContent) {
String regex = convertToRegex(includes);
Pattern pattern = Pattern.compile(regex);
includeRegexList.add(pattern);
}
return includeRegexList;
}
/**
* This takes the exclude list provided by the user in the config file
* It converts the user values to {@link Pattern}
* @param excludeContent
* The exclude list specified by the user
* @return
* A list of regular expression patterns {@link Pattern}
*/
public List getExcludePatterns(List<String> excludeContent ) {
List<Pattern> excludeRegexList = new ArrayList<Pattern>();
for (String excludes : excludeContent) {
String regex = convertToRegex(excludes);
Pattern pattern = Pattern.compile(regex);
excludeRegexList.add(pattern);
}
return excludeRegexList;
}
/**
* This will tokenize the pattern and convert it into a regular expression
* @param pattern
*/
private String convertToRegex(String pattern) {
StringBuilder regex = new StringBuilder();
char nc = ' ';
if (pattern.length() >0 ) {
for ( int i = 0 ; i < pattern.length(); i ++ ) {
char c = pattern.charAt(i);
nc = ' ';
if ((i +1) != pattern.length()) {
nc = pattern.charAt(i +1);
}
//escape single '.'
if (c == '.' && nc != '.'){
regex.append('\\');
regex.append('.');
//do not allow patterns like a..b
} else if (c == '.'){
continue;
// "**" gets replaced by ".*"
} else if ((c=='*') && (nc == '*')) {
regex.append(".*");
break;
//'*' replaced by anything but '.' i.e [^\\.]+
} else if (c=='*') {
regex.append("[^\\.]+");
continue;
//'?' replaced by anything but '.' i.e [^\\.]
} else if (c=='?') {
regex.append("[^\\.]");
//else leave the chars as they occur in the pattern
} else
regex.append(c);
}
}
return regex.toString();
}
protected void unexpectedX(String token) throws SAXException {
errorHandler.error(
new SAXParseException(Messages.UNEXPECTED_NGCC_TOKEN.format(
token, getLocator().getLineNumber(), getLocator().getColumnNumber()),
getLocator()));
}
}