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/*
 * 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
 *
 * http://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.
 */
package org.apache.phoenix.parse;

import java.sql.SQLException;

import org.apache.phoenix.compile.ColumnResolver;



/**
 * 
 * Abstract base class for FROM clause data sources
 *
 * 
 * @since 0.1
 */
public abstract class TableNode {
    private final String alias;

    TableNode(String alias) {
        this.alias = alias;
    }

    public String getAlias() {
        return alias;
    }

    @Override
    public final String toString() {
        StringBuilder buf = new StringBuilder();
        toSQL(null,buf);
        return buf.toString();
    }

    public abstract  T accept(TableNodeVisitor visitor) throws SQLException;
    public abstract void toSQL(ColumnResolver resolver, StringBuilder buf);
}