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package com.metaweb.lessen;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.Reader;
import java.io.Writer;
import java.net.URL;
import java.net.URLConnection;
import java.util.Map;
import com.metaweb.lessen.tokenizers.ReaderTokenizer;
import com.metaweb.lessen.tokenizers.RegroupingTokenizer;
import com.metaweb.lessen.tokenizers.StringTokenizer;
import com.metaweb.lessen.tokenizers.Tokenizer;
import com.metaweb.lessen.tokenizers.VariableResolvingTokenizer;
import com.metaweb.lessen.tokens.Token;
public class Utilities {
static public Tokenizer open(String s) {
return wrap(new StringTokenizer(s));
}
static public Tokenizer open(Reader reader) {
return wrap(new ReaderTokenizer(reader));
}
static public Tokenizer open(File file) throws FileNotFoundException {
return open(new FileReader(file));
}
static public Tokenizer open(URL url) throws IOException {
URLConnection conn = url.openConnection();
String encoding = conn.getContentEncoding();
Reader reader = encoding != null ?
new InputStreamReader(conn.getInputStream(), encoding) :
new InputStreamReader(conn.getInputStream());
return open(reader);
}
static public Tokenizer openLess(File file, Map<String, String> variables) throws FileNotFoundException {
return openLess(file, variables, new Scope(null));
}
static public Tokenizer openLess(File file, Map<String, String> variables, Scope scope) throws FileNotFoundException {
return wrapLess(open(file), new FileResourceFinder(file), variables, scope);
}
static public Tokenizer openLess(URL url, Map<String, String> variables) throws IOException {
return openLess(url, variables, new Scope(null));
}
static public Tokenizer openLess(URL url, Map<String, String> variables, Scope scope) throws IOException {
return wrapLess(open(url), new URLResourceFinder(url), variables, scope);
}
static public void write(Tokenizer tokenizer, Writer writer) throws IOException {
Token t;
while ((t = tokenizer.getToken()) != null) {
writer.write(t.getCleanText());
tokenizer.next();
}
}
static public void print(Tokenizer tokenizer, PrintStream ps) throws IOException {
Token t;
while ((t = tokenizer.getToken()) != null) {
ps.print(t.getCleanText());
tokenizer.next();
}
}
static protected Tokenizer wrap(Tokenizer t) {
return new RegroupingTokenizer(t);
}
static protected Tokenizer wrapLess(Tokenizer tokenizer, ResourceFinder resourceFinder, Map<String, String> variables, Scope scope) {
tokenizer = new LessParser(
variables == null ? tokenizer :
new VariableResolvingTokenizer(tokenizer, variables, true),
variables == null ? resourceFinder :
new VariableResolvingResourceFinder(resourceFinder, variables),
scope);
return tokenizer;
}
}
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