/*
 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */
package com.sun.xml.internal.rngom.parse.host;

import com.sun.xml.internal.rngom.ast.builder.Annotations;
import com.sun.xml.internal.rngom.ast.builder.BuildException;
import com.sun.xml.internal.rngom.ast.builder.Grammar;
import com.sun.xml.internal.rngom.ast.om.Location;
import com.sun.xml.internal.rngom.ast.om.ParsedPattern;

/**
 * Wraps {@link Grammar} and provides error checking.
 * 
 * <p>
 * The following errors are checked by this host:
 * 
 * <ol>
 *  <li>referenced to undefined patterns.
 * </ol>
 * 
 * @author
 *      Kohsuke Kawaguchi (kk@kohsuke.org)
 */
public class GrammarHost extends ScopeHost implements Grammar {
    final Grammar lhs;
    final Grammar rhs;

    public GrammarHost(Grammar lhs,Grammar rhs) {
        super(lhs,rhs);
        this.lhs = lhs;
        this.rhs = rhs;
    }

    public ParsedPattern endGrammar(Location _loc, Annotations _anno) throws BuildException {
        LocationHost loc = cast(_loc);
        AnnotationsHost anno = cast(_anno);
        
        return new ParsedPatternHost(
            lhs.endGrammar(loc.lhs, anno.lhs),
            rhs.endGrammar(loc.rhs, anno.rhs));
    }
}
