package org.geoserver.catalog.hibernate.types;
import java.io.ByteArrayOutputStream;
import java.io.Serializable;
import java.io.StringReader;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import org.geotools.filter.v1_1.OGC;
import org.geotools.filter.v1_1.OGCConfiguration;
import org.geotools.util.Utilities;
import org.geotools.xml.Encoder;
import org.geotools.xml.Parser;
import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;
import org.opengis.filter.Filter;
/**
* Hibernate user type for {@link Filter}.
*
* @author This class persists a filter as a string of xml.
*
*/
public class FilterType implements UserType {
/**
* xml configuration for parsing / encoding filters.
*/
static OGCConfiguration ogc = new OGCConfiguration();
public Object assemble(Serializable cached, Object owner) throws HibernateException {
return null;
}
public Object deepCopy(Object value) throws HibernateException {
return value;
}
public Serializable disassemble(Object value) throws HibernateException {
return null;
}
public boolean equals(Object x, Object y) throws HibernateException {
return Utilities.equals(x, y);
}
public int hashCode(Object x) throws HibernateException {
return x.hashCode();
}
public boolean isMutable() {
return false;
}
public Object nullSafeGet(ResultSet rs, String[] names, Object owner)
throws HibernateException, SQLException {
String xml = rs.getString(names[0]);
if (xml == null) {
return null;
}
Parser parser = new Parser(ogc);
try {
Filter filter = (Filter) parser.parse(new StringReader(xml));
return filter;
} catch (Exception e) {
String msg = "Could not decode filter: " + xml;
throw new HibernateException(msg, e);
}
}
public void nullSafeSet(PreparedStatement st, Object value, int index)
throws HibernateException, SQLException {
Filter filter = (Filter) value;
if (filter == null) {
st.setString(index, null);
return;
}
Encoder encoder = new Encoder(ogc);
ByteArrayOutputStream output = new ByteArrayOutputStream();
try {
encoder.encode(filter, OGC.Filter, output);
st.setString(index, new String(output.toByteArray()));
} catch (Exception e) {
String msg = "Could not encode filter: " + filter;
throw new HibernateException(msg, e);
}
}
public Object replace(Object original, Object target, Object owner) throws HibernateException {
return original;
}
public Class<Filter> returnedClass() {
return Filter.class;
}
private static final int[] SQLTYPES = new int[] { Types.VARCHAR};
public int[] sqlTypes() {
return SQLTYPES;
}
}