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package org.hsqldb;

import org.hsqldb.HsqlNameManager.HsqlName;
import org.hsqldb.lib.OrderedHashSet;
import org.hsqldb.rights.Grantee;

Implementation of SQL period metadata.

Author:
Fred Toussi (fredt@users dot sourceforge.net)
Version:
2.5.0
Since:
2.5.0/**
 * Implementation of SQL period metadata.<p>
 *
 * @author Fred Toussi (fredt@users dot sourceforge.net)
 * @version 2.5.0
 * @since 2.5.0
 */
public class PeriodDefinition implements SchemaObject {

    final HsqlName periodName;
    final int      periodType;
    ColumnSchema   startColumn;
    ColumnSchema   endColumn;
    OrderedHashSet columnNames;

    PeriodDefinition(HsqlName periodName, int periodType,
                     OrderedHashSet columnNames) {

        this.periodName  = periodName;
        this.periodType  = periodType;
        this.columnNames = columnNames;
    }

    public ColumnSchema getStartColumn() {
        return startColumn;
    }

    public ColumnSchema getEndColumn() {
        return endColumn;
    }

    public int getPeriodType() {
        return periodType;
    }

    public int getType() {
        return SchemaObject.PERIOD;
    }

    public HsqlName getName() {
        return periodName;
    }

    public HsqlName getSchemaName() {
        return periodName.schema;
    }

    public HsqlName getCatalogName() {
        return periodName.schema.schema;
    }

    public Grantee getOwner() {
        return periodName.schema.owner;
    }

    public OrderedHashSet getReferences() {
        return null;
    }

    public OrderedHashSet getComponents() {
        return null;
    }

    public void compile(Session session, SchemaObject parentObject) {}

    public String getSQL() {
        return "";
    }

    public long getChangeTimestamp() {
        return 0L;
    }
}