Java Query.getCoordinateSystem方法代码示例

import org.geotools.data.Query; //导入方法依赖的package包/类
/**
     * Transforms the query applying the definition query in this layer, removes reprojection
     * since data stores cannot be trusted
     * @param query
     * @param schema TODO
     *
     * @throws IOException
     */
    protected Query adaptQuery(Query query, SimpleFeatureType schema) throws IOException {
        // if needed, reproject the filter to the native srs
        
        
        Query newQuery = makeDefinitionQuery(query, schema);

//        // see if the CRS got xfered over
//        // a. old had a CRS, new doesnt
//        boolean requireXferCRS = (newQuery.getCoordinateSystem() == null)
//            && (query.getCoordinateSystem() != null);
//
//        if ((newQuery.getCoordinateSystem() != null) && (query.getCoordinateSystem() != null)) {
//            //b. both have CRS, but they're different
//            requireXferCRS = !(newQuery.getCoordinateSystem().equals(query.getCoordinateSystem()));
//        }
//
//        if (requireXferCRS) {
//            //carry along the CRS
//            if (!(newQuery instanceof Query)) {
//                newQuery = new Query(newQuery);
//            }
//
//            ((Query) newQuery).setCoordinateSystem(query.getCoordinateSystem());
//        }
        
        //JD: this is a huge hack... but its the only way to ensure that we 
        // we get what we ask for ... which is not reprojection, since 
        // datastores are unreliable in this aspect we dont know if they will
        // reproject or not.
        // AA: added force coordinate system reset as well, since we cannot
        // trust GT2 datastores there neither.
        if ( newQuery.getCoordinateSystemReproject() != null ) {
            newQuery.setCoordinateSystemReproject(null);
        }
        if ( newQuery.getCoordinateSystem() != null ) {
            newQuery.setCoordinateSystem(null);
        }
        return newQuery;
    }
 

import org.geotools.data.Query; //导入方法依赖的package包/类
/**
 * Equality based on propertyNames, maxFeatures, filter, typeName and
 * version.
 * 
 * <p>
 * Changing the handle does not change the meaning of the Query.
 * </p>
 * 
 * @param obj
 *            Other object to compare against
 * 
 * @return <code>true</code> if <code>obj</code> matches this filter
 */
@Override
public boolean equals(final Object obj) {
	if ((obj == null) || !(obj instanceof Query)) {
		return false;
	}

	if (this == obj) {
		return true;
	}

	final Query other = (Query) obj;

	return Arrays.equals(getPropertyNames(), other.getPropertyNames())
			&& (retrieveAllProperties() == other.retrieveAllProperties())
			&& (getMaxFeatures() == other.getMaxFeatures())
			&& ((getFilter() == null) ? (other.getFilter() == null)
					: getFilter().equals(other.getFilter()))
			&& ((getTypeName() == null) ? (other.getTypeName() == null)
					: getTypeName().equals(other.getTypeName()))
			&& ((getVersion() == null) ? (other.getVersion() == null)
					: getVersion().equals(other.getVersion()))
			&& ((getCoordinateSystem() == null) ? (other
					.getCoordinateSystem() == null) : getCoordinateSystem()
					.equals(other.getCoordinateSystem()))
			&& ((getCoordinateSystemReproject() == null) ? (other
					.getCoordinateSystemReproject() == null)
					: getCoordinateSystemReproject().equals(
							other.getCoordinateSystemReproject()));
}
 

import org.geotools.data.Query; //导入方法依赖的package包/类
protected String buildSqlQuery(Query query) throws IOException {
    StringBuilder sql = new StringBuilder("SELECT ");
    
    //column names
    selectColumns(getSchema(), null, query, sql);
    sql.setLength(sql.length() - 1);
    
    // from
    sql.append(" FROM ");
    sql.append(typeName);
    
    //filtering
    Filter filter = query.getFilter();
    if (filter != null && !Filter.INCLUDE.equals(filter)) {            
        sql.append(" WHERE ");
        
        //encode filter
        CoordinateReferenceSystem queryCrs = (query.getCoordinateSystem() != null) ? query.getCoordinateSystem() : query.getCoordinateSystemReproject();
        filter(getSchema(), filter, sql, queryCrs);
    }

    //sorting
    sort(getSchema(), query.getSortBy(), null, sql);
    
    // finally encode limit/offset, if necessary
    applyLimitOffset(sql, query);
    
    return sql.toString();
}