/*
 * Copyright (C) 2004-2011
 * 
 * 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 org.kohsuke.rngom.digested;

/**
 * @author Kohsuke Kawaguchi (kk@kohsuke.org)
 */
public class DDefine {
    private final String name;

    private DPattern pattern;
    private Boolean nullable;
    DAnnotation annotation;

    public DDefine(String name) {
        this.name = name;
    }

    public DPattern getPattern() {
        return pattern;
    }

    public DAnnotation getAnnotation() {
        if(annotation==null)
            return DAnnotation.EMPTY;
        return annotation;
    }

    public void setPattern(DPattern pattern) {
        this.pattern = pattern;
        this.nullable = null;
    }

    /**
     * Gets the name of the pattern block.
     */
    public String getName() {
        return name;
    }

    public boolean isNullable() {
        if(nullable==null)
            nullable = pattern.isNullable()?Boolean.TRUE:Boolean.FALSE;
        return nullable.booleanValue();
    }
}