com.tesora.dve.distribution.ColumnDatum.java Source code

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Here is the source code for com.tesora.dve.distribution.ColumnDatum.java

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package com.tesora.dve.distribution;

/*
 * #%L
 * Tesora Inc.
 * Database Virtualization Engine
 * %%
 * Copyright (C) 2011 - 2014 Tesora Inc.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import java.io.Serializable;

import com.tesora.dve.db.DBNative;
import com.tesora.dve.server.global.HostService;
import com.tesora.dve.singleton.Singletons;
import org.apache.commons.lang.ArrayUtils;

import com.tesora.dve.common.catalog.PersistentColumn;
import com.tesora.dve.db.mysql.MysqlNativeType;
import com.tesora.dve.sql.schema.types.BasicType;

public class ColumnDatum implements Serializable, IColumnDatum {

    private static final long serialVersionUID = 1L;

    transient PersistentColumn userColumn;

    Object value = null;

    String comparatorClassName;

    public ColumnDatum(PersistentColumn col) {
        userColumn = col;
    }

    public ColumnDatum(PersistentColumn col, Object v) {
        this(col);
        value = v;
    }

    public ColumnDatum(ColumnDatum other) {
        this.value = other.value;
        this.userColumn = other.userColumn;
    }

    public PersistentColumn getUserColumn() {
        return userColumn;
    }

    public void setValue(Object object) {
        value = object;
    }

    @Override
    public Object getValue() {
        return value;
    }

    @Override
    public Comparable<?> getValueForComparison() {
        return getValueForComparison(this, value);
    }

    public static Comparable<?> getValueForComparison(IColumnDatum col, Object value) {
        Comparable<?> valueForCompare = (Comparable<?>) value;
        if (MysqlNativeType.MysqlType.DATETIME.toString().equals(col.getNativeType())) {
            if (value instanceof String) {
                valueForCompare = (Comparable<?>) Singletons.require(DBNative.class).getValueConverter().convert(
                        (String) value,
                        BasicType.getDateTimeType(Singletons.require(DBNative.class).getTypeCatalog()));
            }
        } else {
            if (value instanceof Integer)
                valueForCompare = new Long(Long.valueOf(((Integer) value).longValue()));
            else if (value instanceof Short)
                valueForCompare = new Long(Long.valueOf(((Short) value).longValue()));
            else if (value instanceof Byte)
                valueForCompare = new Long(Long.valueOf(((Byte) value).longValue()));
        }
        return valueForCompare;
    }

    @Override
    public boolean equals(Object o) {
        return equals(this, (IColumnDatum) o);
    }

    public static boolean equals(IColumnDatum left, IColumnDatum right) {
        return left.getColumn().equals(right.getColumn()) && ((left.getValue() == null && right.getValue() == null)
                || left.getValue().equals(right.getValue()));
    }

    @Override
    public int hashCode() {
        if (value != null && value.getClass().isArray()) {
            return ArrayUtils.hashCode(value);
        }
        return (value == null ? 0 : value.hashCode());
    }

    @Override
    public String toString() {
        return getColumn() + "/" + (value == null ? "null" : value.toString());
    }

    @Override
    public String getComparatorClassName() {
        return comparatorClassName;
    }

    @Override
    public void setComparatorClassName(String comparatorClassName) {
        this.comparatorClassName = comparatorClassName;
    }

    @Override
    public String getNativeType() {
        return this.userColumn.getTypeName();
    }

    @Override
    public PersistentColumn getColumn() {
        return userColumn;
    }
}