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package oracle.toplink.essentials.internal.ejb.cmp3.metadata.tables;

import javax.persistence.SecondaryTable;
import javax.persistence.PrimaryKeyJoinColumn;

import oracle.toplink.essentials.internal.ejb.cmp3.metadata.columns.MetadataPrimaryKeyJoinColumns;
import oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataLogger;

/**
 * Object to hold onto a secondary table metadata in a TopLink database table.
 * 
 * @author Guy Pelletier
 * @since TopLink EJB 3.0 Reference Implementation
 */
public class MetadataSecondaryTable extends MetadataTable  {
    private PrimaryKeyJoinColumn[] m_pkJoinColumns;
    protected MetadataPrimaryKeyJoinColumns m_primaryKeyJoinColumns;
    
    /**
     * INTERNAL:
     */
    public MetadataSecondaryTable(MetadataLogger logger) {
        super(logger);
        m_primaryKeyJoinColumns = null; 
    }
    
    /**
     * INTERNAL:
     */
    public MetadataSecondaryTable(SecondaryTable secondaryTable, MetadataLogger logger) {
        this(logger);
        
        if (secondaryTable != null) {
            m_name = secondaryTable.name();
            m_schema = secondaryTable.schema();
            m_catalog = secondaryTable.catalog();
            m_pkJoinColumns = secondaryTable.pkJoinColumns();
            
            processName();
            processUniqueConstraints(secondaryTable.uniqueConstraints());
        }
    }
    
    /**
     * INTERNAL:
     */
    public String getCatalogContext() {
        return m_logger.SECONDARY_TABLE_CATALOG;
    }
    
    /**
     * INTERNAL:
     */
    public String getNameContext() {
        return m_logger.SECONDARY_TABLE_NAME;
    }
    
    /**
     * INTERNAL:
     */
    public MetadataPrimaryKeyJoinColumns getPrimaryKeyJoinColumns(String sourceTableName) {
        if (m_primaryKeyJoinColumns == null) {
            processPrimaryKeyJoinColumns(sourceTableName);
        }
        
        return m_primaryKeyJoinColumns;
    }
    
    /**
     * INTERNAL:
     */
    public String getSchemaContext() {
        return m_logger.SECONDARY_TABLE_SCHEMA;
    }
    
    /**
     * INTERNAL: (Overridden in XMLSecondaryTable)
     */
    protected void processPrimaryKeyJoinColumns(String sourceTableName) {
        m_primaryKeyJoinColumns = new MetadataPrimaryKeyJoinColumns(m_pkJoinColumns, sourceTableName, m_databaseTable.getQualifiedName());
    }
}