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Hibernate example source code file (PositionalParameterSpecification.java)

This example Hibernate source code file (PositionalParameterSpecification.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Hibernate tags/keywords

abstractexplicitparameterspecification, jdbc, object, object, parameterspecification, parameterspecification, positionalparameterspecification, positionalparameterspecification, queryparameters, queryparameters, sessionimplementor, sql, sqlexception, string, type

The Hibernate PositionalParameterSpecification.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Middleware LLC.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 *
 */
package org.hibernate.param;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import org.hibernate.engine.spi.QueryParameters;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.type.Type;

/**
 * Parameter bind specification for an explicit  positional (or ordinal) parameter.
 *
 * @author Steve Ebersole
 */
public class PositionalParameterSpecification extends AbstractExplicitParameterSpecification implements ParameterSpecification {
	private final int hqlPosition;

	/**
	 * Constructs a position/ordinal parameter bind specification.
	 *
	 * @param sourceLine See {@link #getSourceLine()}
	 * @param sourceColumn See {@link #getSourceColumn()}
	 * @param hqlPosition The position in the source query, relative to the other source positional parameters.
	 */
	public PositionalParameterSpecification(int sourceLine, int sourceColumn, int hqlPosition) {
		super( sourceLine, sourceColumn );
		this.hqlPosition = hqlPosition;
	}

	/**
	 * Bind the appropriate value into the given statement at the specified position.
	 *
	 * @param statement The statement into which the value should be bound.
	 * @param qp The defined values for the current query execution.
	 * @param session The session against which the current execution is occuring.
	 * @param position The position from which to start binding value(s).
	 *
	 * @return The number of sql bind positions "eaten" by this bind operation.
	 */
	public int bind(PreparedStatement statement, QueryParameters qp, SessionImplementor session, int position) throws SQLException {
		Type type = qp.getPositionalParameterTypes()[hqlPosition];
		Object value = qp.getPositionalParameterValues()[hqlPosition];

		type.nullSafeSet( statement, value, position, session );
		return type.getColumnSpan( session.getFactory() );
	}

	/**
	 * {@inheritDoc}
	 */
	public String renderDisplayInfo() {
		return "ordinal=" + hqlPosition + ", expectedType=" + getExpectedType();
	}

	/**
	 * Getter for property 'hqlPosition'.
	 *
	 * @return Value for property 'hqlPosition'.
	 */
	public int getHqlPosition() {
		return hqlPosition;
	}
}

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