nl.vpro.jcr.criteria.query.criterion.SimpleExpression.java Source code

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Here is the source code for nl.vpro.jcr.criteria.query.criterion.SimpleExpression.java

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/**
 *
 * Criteria API for Magnolia CMS (http://www.openmindlab.com/lab/products/mgnlcriteria.html)
 * Copyright(C) 2009-2013, Openmind S.r.l. http://www.openmindonline.it
 *
 *  This program 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  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 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 <http://www.gnu.org/licenses/>.
 */

package nl.vpro.jcr.criteria.query.criterion;

import nl.vpro.jcr.criteria.query.Criteria;
import nl.vpro.jcr.criteria.query.JCRQueryException;
import nl.vpro.jcr.criteria.query.xpath.utils.XPathTextUtils;

import java.util.Calendar;

import org.apache.commons.lang3.StringUtils;

/**
 * superclass for "simple" comparisons (with XPATH binary operators)
 * @author Federico Grilli
 * @version $Id$
 */
public class SimpleExpression extends BaseCriterion implements Criterion {

    private static final long serialVersionUID = -1104419394978535803L;

    private final String propertyName;

    private final Object value;

    private final String op;

    protected SimpleExpression(String propertyName, Object value, String op) {
        this.propertyName = propertyName;
        this.value = value;
        this.op = op;
    }

    @Override
    public String toString() {
        return propertyName + getOp() + value;
    }

    protected final String getOp() {
        return op;
    }

    @Override
    public String toXPathString(Criteria criteria) throws JCRQueryException {
        StringBuilder fragment = new StringBuilder();
        fragment.append(" (");

        if (value instanceof String) {
            fragment.append(propertyName).append(getOp());
            // Generally, if you enclose values in single quotes, you just need to replace any literal single quote
            // character with '' (two consecutive single quote characters).
            String escValue = StringUtils.replace((String) value, "'", "''");
            fragment.append("'").append(escValue).append("') ");
        } else if (value instanceof Number) {
            fragment.append(propertyName).append(getOp());
            fragment.append(value).append(") ");
        } else if (value instanceof Character) {
            fragment.append(propertyName).append(getOp());
            fragment.append("'").append(Character.toString((Character) value)).append("') ");
        } else if (value instanceof Boolean) {
            if ((Boolean) value) {
                fragment.append(propertyName).append(getOp());
                fragment.append(value).append(") ");
            } else {
                // false should also match a missing boolean property
                fragment.append("(");
                fragment.append(propertyName).append(getOp());

                fragment.append(value).append(") or not(").append(propertyName).append(" ))");
            }
        } else if (value instanceof Calendar) {
            fragment.append(propertyName).append(getOp());
            Calendar cal = (Calendar) value;

            fragment.append(XS_DATETIME_FUNCTION + "('").append(XPathTextUtils.toXsdDate(cal)).append("')) ");
        } else if (value != null) {
            fragment.append(propertyName).append(getOp());
            // just use the toString() of the given object
            fragment.append("'").append(value).append("') ");
        }
        log.debug("xpathString is {} ", fragment);
        return fragment.toString();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (o == null || getClass() != o.getClass())
            return false;

        SimpleExpression that = (SimpleExpression) o;

        if (propertyName != null ? !propertyName.equals(that.propertyName) : that.propertyName != null)
            return false;
        if (value != null ? !value.equals(that.value) : that.value != null)
            return false;
        return op != null ? op.equals(that.op) : that.op == null;
    }

    @Override
    public int hashCode() {
        int result = propertyName != null ? propertyName.hashCode() : 0;
        result = 31 * result + (value != null ? value.hashCode() : 0);
        result = 31 * result + (op != null ? op.hashCode() : 0);
        return result;
    }
}