edu.uiowa.icts.criterion.CastAsVarcharLike.java Source code

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Here is the source code for edu.uiowa.icts.criterion.CastAsVarcharLike.java

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package edu.uiowa.icts.criterion;

/*
 * #%L
 * spring-utils
 * %%
 * Copyright (C) 2010 - 2015 University of Iowa Institute for Clinical and Translational Science (ICTS)
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.criterion.CriteriaQuery;
import org.hibernate.criterion.Criterion;
import org.hibernate.criterion.MatchMode;
import org.hibernate.engine.spi.TypedValue;

/**
 * <p>CastAsVarcharLike class.</p>
 *
 * @author rrlorent
 * @date March 20, 2014
 * @version $Id: $
 */
public class CastAsVarcharLike implements Criterion {

    private static final long serialVersionUID = -6821722080754628376L;

    private String propertyName;
    private String value;

    /**
     * <p>Constructor for CastAsVarcharLike.</p>
     *
     * @param propertyName a {@link java.lang.String} object.
     * @param value a {@link java.lang.String} object.
     */
    public CastAsVarcharLike(String propertyName, String value) {
        this.propertyName = propertyName;
        this.value = value;
    }

    /**
     * {@inheritDoc}
     *
     * (non-Javadoc)
     * @see org.hibernate.criterion.Criterion#toSqlString(org.hibernate.Criteria, org.hibernate.criterion.CriteriaQuery)
     */
    @Override
    public String toSqlString(Criteria criteria, CriteriaQuery criteriaQuery) throws HibernateException {
        String[] columns = criteriaQuery.getColumnsUsingProjection(criteria, propertyName);
        if (columns.length != 1) {
            throw new HibernateException("like may only be used with single-column properties");
        }
        return " lower( cast( " + columns[0] + " as varchar ) ) like ? ";
    }

    /**
     * {@inheritDoc}
     *
     * (non-Javadoc)
     * @see org.hibernate.criterion.Criterion#getTypedValues(org.hibernate.Criteria, org.hibernate.criterion.CriteriaQuery)
     */
    @Override
    public TypedValue[] getTypedValues(Criteria criteria, CriteriaQuery criteriaQuery) throws HibernateException {
        return new TypedValue[] { new TypedValue(new org.hibernate.type.StringType(),
                MatchMode.START.toMatchString(value.toLowerCase())) };
    }

}