/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package buildlexer;
import java.util.HashMap;
import java.util.Map;
import org.apache.jena.iri.impl.PatternCompiler ;
import org.apache.jena.iri.impl.VarPattern ;
abstract public class Expansion {
int errors[] = new int[100];
String comments[] = new String[100];
int cIx = 0;
int eIx = 0;
public Expansion() {
}
Map<String, String> doing = new HashMap<String, String>();
abstract public void doIt(String regex, int eCount, int eCodes[], int cCount, String coms[]);
public void expand(String data) {
int at;
at = data.indexOf("@{labelI");
if ( at==-1 )
at = data.indexOf("@{");
if (at == -1)
doIt(data, eIx, errors, cIx, comments);
else {
// String prefix = data.substring(0, at);
int match = data.indexOf('}', at);
String varName = data.substring(at + 2, match);
if (doing.containsKey(varName)) {
// System.err.println("Possible Recursion: " + varName);
String p = doing.get(varName);
String nData = data.replaceAll("@\\{" + varName + "\\}", p);
expand(nData);
} else {
// String postfix = data.substring(match + 1);
VarPattern vp[] = PatternCompiler.lookup(varName);
int eIxBase = eIx;
for (int i = 0; i < vp.length; i++) {
addErrors(vp[i].errors);
String nData;
String p;
try {
p = vp[i].pattern;
p = p.replaceAll("\\\\", "\\\\\\\\");
p = p.replaceAll("\\$", "\\\\\\$");
p = "(" + p + ")";
doing.put(varName, p);
nData = data.replaceAll("@\\{" + varName + "\\}", p);
} catch (RuntimeException e) {
System.err.println(data);
System.err.println(varName);
System.err.println(vp[i].pattern);
throw e;
}
comments[cIx++] = varName + " => " + p;
expand(nData);
eIx = eIxBase;
cIx--;
}
doing.remove(varName);
}
}
}
void addErrors(int e[]) {
for (int i = 0; i < e.length; i++)
errors[eIx++] = e[i];
}
}