external/storm-cassandra/src/main/java/org/apache/storm/cassandra/query/Column.java

/**
 * 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.storm.cassandra.query;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

public class Column<T> implements Serializable {

    private final String columnName;
    private final T val;

    public Column(String columnName, T val) {
        this.columnName = columnName;
        this.val = val;
    }

    public static Object[] getVals(List<Column> columns) {
        List<Object> vals = new ArrayList<>(columns.size());
        for (Column c : columns) {
            vals.add(c.getVal());
        }
        return vals.toArray();
    }

    public String getColumnName() {
        return columnName;
    }

    public T getVal() {
        return val;
    }

    public boolean isNull() {
        return val == null;
    }

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

        Column column = (Column) o;

        if (columnName != null ? !columnName.equals(column.columnName) : column.columnName != null) {
            return false;
        }
        if (val != null ? !val.equals(column.val) : column.val != null) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        int result = columnName != null ? columnName.hashCode() : 0;
        result = 31 * result + (val != null ? val.hashCode() : 0);
        return result;
    }
}