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/*
* _____________________________________________________________________________
*
* INAF - OATS National Institute for Astrophysics - Astronomical Observatory of
* Trieste INAF - IA2 Italian Center for Astronomical Archives
* _____________________________________________________________________________
*
* Copyright (C) 2016 Istituto Nazionale di Astrofisica
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU 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 General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package it.inaf.ia2.tsm;
import java.util.Objects;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author Sonia Zorba {@literal <zorba at oats.inaf.it>}
*/
public class Column extends ChildEntity<Table> {
public final static String TABLE_NAME_KEY = "table_name";
public final static String COLUMN_NAME_KEY = "column_name";
public final static String DATATYPE_KEY = "datatype";
public final static String SIZE_KEY = "size";
public final static String ARRAYSIZE_KEY = "arraysize";
public final static String INDEXED_KEY = "indexed";
public final static String PRIMARY_KEY = "primary_key";
private static final long serialVersionUID = 9175956487892235521L;
private static final Logger LOG = LoggerFactory.getLogger(Column.class);
private boolean foreignKeySearched;
private KeyMetadata foreignKey;
private Table parentTable;
private Column() {
// for serialization
super();
}
protected Column(TapSchema tapSchema, Table table, String columnName) {
super(tapSchema, tapSchema.getTableModel(TapSchema.COLUMNS_TABLE), table.getColumnMetadata(columnName));
parentTable = table;
setStatus(Status.LOADED);
}
public KeyMetadata getForeignKey() {
if (!foreignKeySearched) { // lazy loading (but the foreignKey value can be null, so we use this boolean)
foreignKey = tapSchema.searchKeyMetadata(parentTable.getParent().getName(), parentTable.getName(), getName());
}
return foreignKey;
}
public String getTableCompleteName() {
return getValue(TABLE_NAME_KEY, String.class);
}
@Override
public String getName() {
return getValue(COLUMN_NAME_KEY, String.class);
}
public boolean getIndexed() {
return getValue(INDEXED_KEY, Boolean.class);
}
/**
* This information is not stored into the TAP_SCHEMA, so it will be
* reloaded from the source schema each time.
*/
public boolean isPrimaryKey() {
return (boolean) getMetadata(PRIMARY_KEY);
}
@Override
public int hashCode() {
int hash = 7;
hash = 29 * hash + Objects.hashCode(getTableCompleteName());
hash = 29 * hash + Objects.hashCode(getName());
return hash;
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Column other = (Column) obj;
if (!Objects.equals(this.getTableCompleteName(), other.getTableCompleteName())) {
return false;
}
return Objects.equals(this.getName(), other.getName());
}
/**
* {@inheritDoc}
*/
@Override
public Table getParent() {
return parentTable;
}
}