net.antidot.semantic.rdf.rdb2rdf.r2rml.model.StdJoinCondition Maven / Gradle / Ivy

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/* 
 * Copyright 2011 Antidot [email protected]
 * https://github.com/antidot/db2triples
 * 
 * DB2Triples is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License as 
 * published by the Free Software Foundation; either version 2 of 
 * the License, or (at your option) any later version.
 * 
 * DB2Triples 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, see .
 */
/***************************************************************************
 *
 * R2RML Model : Standard Join Condition Class
 *
 * A join condition is a resource that has 
 * exactly two properties: 
 * 	- rr:child, whose value is known as the
 * 	  join condition's child column
 * 	- rr:parent, whose value is known as the
 * 	  join condition's parent column 
 * 
 ****************************************************************************/
package net.antidot.semantic.rdf.rdb2rdf.r2rml.model;

import net.antidot.semantic.rdf.rdb2rdf.r2rml.exception.InvalidR2RMLStructureException;
import net.antidot.semantic.rdf.rdb2rdf.r2rml.exception.InvalidR2RMLSyntaxException;
import net.antidot.sql.model.tools.SQLDataValidator;

public class StdJoinCondition implements JoinCondition {

	private String child;
	private String parent;

	public StdJoinCondition(String child, String parent)
			throws InvalidR2RMLStructureException, InvalidR2RMLSyntaxException {
		setChild(child);
		setParent(parent);
	}

	private void setParent(String parent)
			throws InvalidR2RMLStructureException, InvalidR2RMLSyntaxException {
		if (parent == null)
			throw new InvalidR2RMLStructureException(
					"[StdJoinCondition:setParent] A join condition must "
							+ "have a parent column name.");
		// Must a valid SQL identifier
		if (!SQLDataValidator.isValidSQLIdentifier(parent))
			throw new InvalidR2RMLSyntaxException(
					"[StdJoinCondition:setParent] Not a valid column "
							+ "value : " + parent);
		// TODO : Use "`" quote identifier (compatiblity with MySQL)
		// parent = "`" + parent + "`";
		// parent = "\"" + parent + "\"";
		// parent  = parent.replaceAll("\\\"", "`");
		this.parent = parent;
	}

	private void setChild(String child) throws InvalidR2RMLStructureException,
			InvalidR2RMLSyntaxException {
		if (child == null)
			throw new InvalidR2RMLStructureException(
					"[StdJoinCondition:construct] A join condition must "
							+ "have a child column name.");
		// Must a valid SQL identifier
		if (!SQLDataValidator.isValidSQLIdentifier(child))
			throw new InvalidR2RMLSyntaxException(
					"[StdJoinCondition:setParent] Not a valid column "
							+ "value : " + child);
		// TODO : Use "`" quote identifier (compatiblity with MySQL)
		// child = "`" + child + "`";
		// child = "\"" + child + "\"";
		// child  = child.replaceAll("\\\"", "`");
		this.child = child;

	}

	public String getChild() {
		return child;
	}

	public String getParent() {
		return parent;
	}

}