com.facebook.presto.mysql.MySQLTable.java Source code

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Here is the source code for com.facebook.presto.mysql.MySQLTable.java

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/*
 * Licensed 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 com.facebook.presto.mysql;

import com.facebook.presto.mysql.util.MySQLUtils;
import com.google.common.collect.ImmutableList;

import java.util.List;

public class MySQLTable {
    private final MySQLTableHandle tableHandle;
    private final List<MySQLColumnHandle> columns;
    private final int partitionKeyColumns;

    public MySQLTable(MySQLTableHandle tableHandle, List<MySQLColumnHandle> columns) {
        this.tableHandle = tableHandle;
        this.columns = ImmutableList.copyOf(columns);
        int count = 0;
        while (count < columns.size() && columns.get(count).isPartitionKey()) {
            count++;
        }
        partitionKeyColumns = count;
    }

    public List<MySQLColumnHandle> getColumns() {
        return columns;
    }

    public MySQLTableHandle getTableHandle() {
        return tableHandle;
    }

    public List<MySQLColumnHandle> getPartitionKeyColumns() {
        return columns.subList(0, partitionKeyColumns);
    }

    public String getTokenExpression() {
        StringBuilder sb = new StringBuilder();
        for (MySQLColumnHandle column : getPartitionKeyColumns()) {
            if (sb.length() == 0) {
                sb.append("token(");
            } else {
                sb.append(",");
            }
            sb.append(MySQLUtils.validColumnName(column.getName()));
        }
        sb.append(")");
        return sb.toString();
    }

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

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (!(obj instanceof MySQLTable)) {
            return false;
        }
        MySQLTable that = (MySQLTable) obj;
        return this.tableHandle.equals(that.tableHandle);
    }
}