/*
 * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.yangtools.yang.parser.stmt.rfc7950;

import com.google.common.annotations.Beta;
import javax.annotation.Nonnull;
import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.ModifierStatement;
import org.opendaylight.yangtools.yang.model.api.type.ModifierKind;
import org.opendaylight.yangtools.yang.parser.spi.SubstatementValidator;
import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractDeclaredStatement;
import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStatementSupport;
import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
import org.opendaylight.yangtools.yang.parser.stmt.rfc7950.effective.ModifierEffectiveStatementImpl;

/**
 * Class providing necessary support for processing YANG 1.1 Modifier statement.
 */
@Beta
public final class ModifierStatementImpl extends AbstractDeclaredStatement<ModifierKind> implements ModifierStatement {
    private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(
            YangStmtMapping.MODIFIER).build();

    protected ModifierStatementImpl(final StmtContext<ModifierKind, ModifierStatement, ?> context) {
        super(context);
    }

    public static class Definition
            extends
            AbstractStatementSupport<ModifierKind, ModifierStatement, EffectiveStatement<ModifierKind, ModifierStatement>> {

        public Definition() {
            super(YangStmtMapping.MODIFIER);
        }

        @Override
        public ModifierKind parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
            return SourceException.unwrap(ModifierKind.parse(value), ctx.getStatementSourceReference(),
                "'%s' is not valid argument of modifier statement", value);
        }

        @Override
        public ModifierStatement createDeclared(final StmtContext<ModifierKind, ModifierStatement, ?> ctx) {
            return new ModifierStatementImpl(ctx);
        }

        @Override
        public EffectiveStatement<ModifierKind, ModifierStatement> createEffective(
                final StmtContext<ModifierKind, ModifierStatement, EffectiveStatement<ModifierKind, ModifierStatement>> ctx) {
            return new ModifierEffectiveStatementImpl(ctx);
        }

        @Override
        protected SubstatementValidator getSubstatementValidator() {
            return SUBSTATEMENT_VALIDATOR;
        }
    }

    @Nonnull
    @Override
    public ModifierKind getValue() {
        return argument();
    }
}