com.sun.tools.xjc.reader.relaxng.DefineFinder Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2021 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package com.sun.tools.xjc.reader.relaxng;
import java.util.HashSet;
import java.util.Set;
import com.sun.tools.rngom.digested.DDefine;
import com.sun.tools.rngom.digested.DGrammarPattern;
import com.sun.tools.rngom.digested.DPatternWalker;
import com.sun.tools.rngom.digested.DRefPattern;
/**
* Recursively find all {@link DDefine}s in the grammar.
*
* @author Kohsuke Kawaguchi
*/
final class DefineFinder extends DPatternWalker {
public final Set defs = new HashSet<>();
@Override
public Void onGrammar(DGrammarPattern p) {
for( DDefine def : p ) {
defs.add(def);
def.getPattern().accept(this);
}
return p.getStart().accept(this);
}
/**
* We visit all {@link DDefine}s from {@link DGrammarPattern},
* so no point in resolving refs.
*/
@Override
public Void onRef(DRefPattern p) {
return null;
}
}