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package de.akquinet.jbosscc.guttenbase.meta.builder;

import de.akquinet.jbosscc.guttenbase.meta.InternalForeignKeyMetaData;
import de.akquinet.jbosscc.guttenbase.meta.impl.ForeignKeyMetaDataImpl;

/**
 * Builder class for ForeignKeyMetaData.
 * 
 * 
 * © 2012 akquinet tech@spree
 * 
 * 
 * @author M. Dahm
 */
public class ForeignKeyMetaDataBuilder {
	private ColumnMetaDataBuilder _referencingColumn;
	private ColumnMetaDataBuilder _referencedColumn;
	private String _foreignKeyName = "fk";
	private final TableMetaDataBuilder _tableMetaDataBuilder;
	private ForeignKeyMetaDataImpl _result;

	public ForeignKeyMetaDataBuilder(final TableMetaDataBuilder tableMetaDataBuilder) {
		_tableMetaDataBuilder = tableMetaDataBuilder;
	}

	public InternalForeignKeyMetaData build() {
		if (_result == null) {
			_result = new ForeignKeyMetaDataImpl(_tableMetaDataBuilder.build(), _foreignKeyName, _referencingColumn.build(),
					_referencedColumn.build());
		}

		return _result;
	}

	public ForeignKeyMetaDataBuilder setReferencingColumn(final ColumnMetaDataBuilder referencingColumn) {
		assert referencingColumn != null : "referencingColumn != null";
		_referencingColumn = referencingColumn;
		return this;
	}

	public ForeignKeyMetaDataBuilder setReferencedColumn(final ColumnMetaDataBuilder referencedColumn) {
		assert referencedColumn != null : "referencedColumn != null";
		_referencedColumn = referencedColumn;
		return this;
	}

	public ForeignKeyMetaDataBuilder setForeignKeyName(final String foreignKeyName) {
		assert foreignKeyName != null : "foreignKeyName != null";
		_foreignKeyName = foreignKeyName;
		return this;
	}
}