/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *   SPDX-License-Identifier: Apache-2.0
 */

package org.apache.jena.shex.expressions;

import org.apache.jena.atlas.io.IndentedWriter;
import org.apache.jena.graph.Node;
import org.apache.jena.riot.out.NodeFormatter;
import org.apache.jena.shex.sys.ValidationContext;

/** A DOT expression -- "{ . }"  */
public class ShapeExprDot extends ShapeExpression {

    public ShapeExprDot() {
        super();
    }

    @Override
    public void print(IndentedWriter out, NodeFormatter nFmt) {
        out.println(" .");
    }

    @Override
    public boolean satisfies(ValidationContext vCxt, Node data) {
        return true;
    }

    @Override
    public void visit(ShapeExprVisitor visitor) {
        visitor.visit(this);
    }

    @Override
    public String toString() { return "ShapeExprDot"; }

    @Override
    public int hashCode() {
        return ShexConst.hashShExprDot;
    }

    @Override
    public boolean equals(Object obj) {
        if ( this == obj )
            return true;
        if ( obj == null )
            return false;
        if ( getClass() != obj.getClass() )
            return false;
        return true;
    }
}
