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package org.netbeans.modules.schema2beansdev;
import java.io.*;
import java.util.*;
/**
* EntityParser.java - parses the DTD file for entity declarations and creates new Reader
* that replaces the entity references with values
*
* Created on June 11, 2005 AM
* @author mkuchtiak
*/
public class EntityParser {
private java.util.Map entityMap;
private final String text;
public EntityParser(Reader reader) throws IOException {
StringWriter w = new StringWriter();
char[] buf = new char[4096];
int read;
while ((read = reader.read(buf)) != -1) {
w.write(buf, 0, read);
}
this.text = w.toString();
entityMap = new java.util.HashMap();
}
/** Parses file for ENTITY declaration, creates map with entities
*/
public void parse() throws IOException {
BufferedReader br = new BufferedReader(new StringReader(text));
String line = null;
while ((line=br.readLine())!=null) {
int startPos = line.indexOf("=0) addEntity(br,line.substring(startPos+9));
}
br.close();
}
private void addEntity(BufferedReader br, String line) throws IOException {
StringTokenizer tok = new StringTokenizer(line);
if (!tok.hasMoreTokens()) return;
String percentage = tok.nextToken();
if (!"%".equals(percentage)) return; //incorrect ENTITY declaration (missing %)
if (!tok.hasMoreTokens()) return; //incorrect ENTITY declaration (missing entity name)
// cut the first part including entity key
String key = tok.nextToken();
int valueStartPos = line.indexOf(key)+key.length();
String rest = line.substring(valueStartPos);
// looking for starting quotes
valueStartPos = rest.indexOf("\"");
if (valueStartPos<0) return;
// looking for entity value
rest = rest.substring(valueStartPos+1);
String value = resolveValue (rest,br);
// write ENTITY into map
if (value!=null) {
int refStart = value.indexOf("%");
int refEnd = value.indexOf(";");
if (refStart>=0 && refEnd>refStart) { //references other entity
String entityKey = value.substring(refStart+1,refEnd);
String val = (String)entityMap.get(entityKey);
if (val!=null) {
String newValue = value.substring(0,refStart)+val+value.substring(refEnd+1);
// XXX should use config.messageOut instead
System.out.println("found ENTITY: % "+key+" \""+newValue+"\"");
entityMap.put(key,newValue);
}
} else {
System.out.println("found ENTITY: % "+key+" \""+value+"\"");
entityMap.put(key,value);
}
}
}
private String resolveValue(String lineRest, BufferedReader br) throws IOException {
// looking for closing quotes
int index = lineRest.indexOf("\"");
if (index>=0) return lineRest.substring(0,index);
// value across multiple lines
StringBuffer buf = new StringBuffer(lineRest);
buf.append("\n");
int ch=br.read();
while ( ch!=(int)'"' && ch!=(int)'>' && ch!=-1 ) {
buf.append((char)ch);
ch=br.read();
}
return buf.toString();
}
private boolean containsBlank(String s) {
for (int i=0;i=0) line = removeEntityDeclaration(line,br);
// searches for entity reference and replace it with value
int pos = line.indexOf("%");
if (pos>=0) {
StringTokenizer tok = new StringTokenizer(line.substring(pos),";%");
while (tok.hasMoreTokens()) {
String key = tok.nextToken();
if (key.length()>0 && !containsBlank(key)) {
String value = (String)entityMap.get(key);
if (value!=null) line = line.replaceAll("%"+key+";",value);
}
}
}
if (line.length()>0) buf.append(line);
}
br.close();
return new StringReader(buf.toString());
}
/** Removing line(s) containing ENTITY declaration
*/
private String removeEntityDeclaration(String line,BufferedReader br) throws IOException {
int start = line.indexOf("0) buf.append(line.substring(0, start));
int endPos = line.indexOf(">", start);
if (endPos>0) {
buf.append(line.substring(endPos+1));
return buf.toString();
}
String ln=null;
while (endPos<0 && (ln=br.readLine())!=null) {
endPos = ln.indexOf(">");
if (endPos>=0) {
buf.append(ln.substring(endPos+1));
}
}
return buf.toString();
}
}