com.sun.tools.rngom.digested.DGrammarPattern Maven / Gradle / Ivy
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/*
* Copyright (C) 2004-2015
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.sun.tools.rngom.digested;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* {@code } pattern, which is a collection of named patterns.
*
* @author Kohsuke Kawaguchi ([email protected])
*/
public class DGrammarPattern extends DPattern implements Iterable {
private final Map patterns = new HashMap<>();
DPattern start;
/**
* Gets the start pattern.
*/
public DPattern getStart() {
return start;
}
/**
* Gets the named pattern by its name.
*
* @return
* null if not found.
*/
public DDefine get( String name ) {
return patterns.get(name);
}
DDefine getOrAdd( String name ) {
if(patterns.containsKey(name)) {
return get(name);
} else {
DDefine d = new DDefine(name);
patterns.put(name,d);
return d;
}
}
/**
* Iterates all the {@link DDefine}s in this grammar.
*/
public Iterator iterator() {
return patterns.values().iterator();
}
public boolean isNullable() {
return start.isNullable();
}
public V accept( DPatternVisitor visitor ) {
return visitor.onGrammar(this);
}
}