/*
* Geotoolkit - An Open Source Java GIS Toolkit
* http://www.geotoolkit.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
* (C) 2009, Geomatys
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library 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.
*/
package org.geotoolkit.filter.visitor;
import org.opengis.filter.And;
import org.opengis.filter.ExcludeFilter;
import org.opengis.filter.FilterVisitor;
import org.opengis.filter.Id;
import org.opengis.filter.IncludeFilter;
import org.opengis.filter.Not;
import org.opengis.filter.Or;
import org.opengis.filter.PropertyIsBetween;
import org.opengis.filter.PropertyIsEqualTo;
import org.opengis.filter.PropertyIsGreaterThan;
import org.opengis.filter.PropertyIsGreaterThanOrEqualTo;
import org.opengis.filter.PropertyIsLessThan;
import org.opengis.filter.PropertyIsLessThanOrEqualTo;
import org.opengis.filter.PropertyIsLike;
import org.opengis.filter.PropertyIsNil;
import org.opengis.filter.PropertyIsNotEqualTo;
import org.opengis.filter.PropertyIsNull;
import org.opengis.filter.capability.ArithmeticOperators;
import org.opengis.filter.capability.ComparisonOperators;
import org.opengis.filter.capability.FilterCapabilities;
import org.opengis.filter.capability.FunctionName;
import org.opengis.filter.capability.Functions;
import org.opengis.filter.capability.ScalarCapabilities;
import org.opengis.filter.capability.SpatialCapabilities;
import org.opengis.filter.capability.SpatialOperators;
import org.opengis.filter.capability.TemporalCapabilities;
import org.opengis.filter.capability.TemporalOperators;
import org.opengis.filter.expression.Add;
import org.opengis.filter.expression.Divide;
import org.opengis.filter.expression.Expression;
import org.opengis.filter.expression.ExpressionVisitor;
import org.opengis.filter.expression.Function;
import org.opengis.filter.expression.Literal;
import org.opengis.filter.expression.Multiply;
import org.opengis.filter.expression.NilExpression;
import org.opengis.filter.expression.PropertyName;
import org.opengis.filter.expression.Subtract;
import org.opengis.filter.spatial.BBOX;
import org.opengis.filter.spatial.Beyond;
import org.opengis.filter.spatial.Contains;
import org.opengis.filter.spatial.Crosses;
import org.opengis.filter.spatial.DWithin;
import org.opengis.filter.spatial.Disjoint;
import org.opengis.filter.spatial.Equals;
import org.opengis.filter.spatial.Intersects;
import org.opengis.filter.spatial.Overlaps;
import org.opengis.filter.spatial.Touches;
import org.opengis.filter.spatial.Within;
import org.opengis.filter.temporal.After;
import org.opengis.filter.temporal.AnyInteracts;
import org.opengis.filter.temporal.Before;
import org.opengis.filter.temporal.Begins;
import org.opengis.filter.temporal.BegunBy;
import org.opengis.filter.temporal.During;
import org.opengis.filter.temporal.EndedBy;
import org.opengis.filter.temporal.Ends;
import org.opengis.filter.temporal.Meets;
import org.opengis.filter.temporal.MetBy;
import org.opengis.filter.temporal.OverlappedBy;
import org.opengis.filter.temporal.TContains;
import org.opengis.filter.temporal.TEquals;
import org.opengis.filter.temporal.TOverlaps;
/**
* This visitor will return Boolean.TRUE if the provided filter
* is supported by the the FilterCapabilities.
* <p>
* This method will look up the right information in the provided
* FilterCapabilities instance for you depending on the type of filter
* provided.
* <p>
* Example:<pre><code>
* boolean yes = filter.accepts( IsSupportedFilterVisitor( capabilities ), null );
* </code></pre>
*
* Please consider IsSupportedFilterVisitor if you need to be sure of the
* entire Filter.
*
* @author Jody Garnett (Refractions Research)
* @module
*/
public class IsSupportedFilterVisitor implements FilterVisitor, ExpressionVisitor {
private final FilterCapabilities capabilities;
public IsSupportedFilterVisitor( final FilterCapabilities capabilities ){
this.capabilities = capabilities;
}
/** INCLUDE and EXCLUDE are never supported */
@Override
public Object visit( final ExcludeFilter filter, final Object extraData ) {
return false;
}
/** INCLUDE and EXCLUDE are never supported */
@Override
public Object visit( final IncludeFilter filter, final Object extraData ) {
return false;
}
@Override
public Object visit( final And filter, final Object extraData ) {
return capabilities.getScalarCapabilities() != null &&
capabilities.getScalarCapabilities().hasLogicalOperators();
}
@Override
public Object visit( final Id filter, final Object extraData ) {
return capabilities.getIdCapabilities() != null &&
( capabilities.getIdCapabilities().hasFID() ||
capabilities.getIdCapabilities().hasEID() );
}
@Override
public Object visit( final Not filter, final Object extraData ) {
return capabilities.getScalarCapabilities() != null &&
capabilities.getScalarCapabilities().hasLogicalOperators();
}
@Override
public Object visit( final Or filter, final Object extraData ) {
return capabilities.getScalarCapabilities() != null &&
capabilities.getScalarCapabilities().hasLogicalOperators();
}
@Override
public Object visit( final PropertyIsBetween filter, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ComparisonOperators operators = scalar.getComparisonOperators();
if( operators == null ) return false;
return operators.getOperator( PropertyIsBetween.NAME ) != null;
}
@Override
public Object visit( final PropertyIsEqualTo filter, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ComparisonOperators operators = scalar.getComparisonOperators();
if( operators == null ) return false;
return operators.getOperator( PropertyIsEqualTo.NAME ) != null;
}
@Override
public Object visit( final PropertyIsNotEqualTo filter, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ComparisonOperators operators = scalar.getComparisonOperators();
if( operators == null ) return false;
return operators.getOperator( PropertyIsNotEqualTo.NAME ) != null;
}
@Override
public Object visit( final PropertyIsGreaterThan filter, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ComparisonOperators operators = scalar.getComparisonOperators();
if( operators == null ) return false;
return operators.getOperator( PropertyIsGreaterThan.NAME ) != null;
}
@Override
public Object visit( final PropertyIsGreaterThanOrEqualTo filter, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ComparisonOperators operators = scalar.getComparisonOperators();
if( operators == null ) return false;
return operators.getOperator( PropertyIsGreaterThanOrEqualTo.NAME ) != null;
}
@Override
public Object visit( final PropertyIsLessThan filter, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ComparisonOperators operators = scalar.getComparisonOperators();
if( operators == null ) return false;
return operators.getOperator( PropertyIsLessThan.NAME ) != null;
}
@Override
public Object visit( final PropertyIsLessThanOrEqualTo filter, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ComparisonOperators operators = scalar.getComparisonOperators();
if( operators == null ) return false;
return operators.getOperator( PropertyIsLessThanOrEqualTo.NAME ) != null;
}
@Override
public Object visit( final PropertyIsLike filter, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ComparisonOperators operators = scalar.getComparisonOperators();
if( operators == null ) return false;
return operators.getOperator( PropertyIsLike.NAME ) != null;
}
@Override
public Object visit( final PropertyIsNull filter, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ComparisonOperators operators = scalar.getComparisonOperators();
if( operators == null ) return false;
return operators.getOperator( PropertyIsNull.NAME ) != null;
}
@Override
public Object visit(final PropertyIsNil filter, Object extraData) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ComparisonOperators operators = scalar.getComparisonOperators();
if( operators == null ) return false;
return operators.getOperator( PropertyIsNil.NAME ) != null;
}
@Override
public Object visit( final BBOX filter, final Object extraData ) {
final SpatialCapabilities spatial = capabilities.getSpatialCapabilities();
if( spatial == null ) return false;
final SpatialOperators operators = spatial.getSpatialOperators();
if( operators == null ) return false;
return operators.getOperator( BBOX.NAME ) != null;
}
@Override
public Object visit( final Beyond filter, final Object extraData ) {
final SpatialCapabilities spatial = capabilities.getSpatialCapabilities();
if( spatial == null ) return false;
final SpatialOperators operators = spatial.getSpatialOperators();
if( operators == null ) return false;
return operators.getOperator( Beyond.NAME ) != null;
}
@Override
public Object visit( final Contains filter, final Object extraData ) {
final SpatialCapabilities spatial = capabilities.getSpatialCapabilities();
if( spatial == null ) return false;
final SpatialOperators operators = spatial.getSpatialOperators();
if( operators == null ) return false;
return operators.getOperator( Contains.NAME ) != null;
}
@Override
public Object visit( final Crosses filter, final Object extraData ) {
final SpatialCapabilities spatial = capabilities.getSpatialCapabilities();
if( spatial == null ) return false;
final SpatialOperators operators = spatial.getSpatialOperators();
if( operators == null ) return false;
return operators.getOperator( Crosses.NAME ) != null;
}
@Override
public Object visit( final Disjoint filter, final Object extraData ) {
final SpatialCapabilities spatial = capabilities.getSpatialCapabilities();
if( spatial == null ) return false;
final SpatialOperators operators = spatial.getSpatialOperators();
if( operators == null ) return false;
return operators.getOperator( Disjoint.NAME ) != null;
}
@Override
public Object visit( final DWithin filter, final Object extraData ) {
final SpatialCapabilities spatial = capabilities.getSpatialCapabilities();
if( spatial == null ) return false;
final SpatialOperators operators = spatial.getSpatialOperators();
if( operators == null ) return false;
return operators.getOperator( DWithin.NAME ) != null;
}
@Override
public Object visit( final Equals filter, final Object extraData ) {
final SpatialCapabilities spatial = capabilities.getSpatialCapabilities();
if( spatial == null ) return false;
final SpatialOperators operators = spatial.getSpatialOperators();
if( operators == null ) return false;
return operators.getOperator( Equals.NAME ) != null;
}
@Override
public Object visit( final Intersects filter, final Object extraData ) {
final SpatialCapabilities spatial = capabilities.getSpatialCapabilities();
if( spatial == null ) return false;
final SpatialOperators operators = spatial.getSpatialOperators();
if( operators == null ) return false;
return operators.getOperator( Intersects.NAME ) != null;
}
@Override
public Object visit( final Overlaps filter, final Object extraData ) {
final SpatialCapabilities spatial = capabilities.getSpatialCapabilities();
if( spatial == null ) return false;
final SpatialOperators operators = spatial.getSpatialOperators();
if( operators == null ) return false;
return operators.getOperator( Overlaps.NAME ) != null;
}
@Override
public Object visit( final Touches filter, final Object extraData ) {
final SpatialCapabilities spatial = capabilities.getSpatialCapabilities();
if( spatial == null ) return false;
final SpatialOperators operators = spatial.getSpatialOperators();
if( operators == null ) return false;
return operators.getOperator( Touches.NAME ) != null;
}
@Override
public Object visit( final Within filter, final Object extraData ) {
final SpatialCapabilities spatial = capabilities.getSpatialCapabilities();
if( spatial == null ) return false;
final SpatialOperators operators = spatial.getSpatialOperators();
if( operators == null ) return false;
return operators.getOperator( Within.NAME ) != null;
}
@Override
public Object visit(After filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( After.NAME ) != null;
}
@Override
public Object visit(AnyInteracts filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( AnyInteracts.NAME ) != null;
}
@Override
public Object visit(Before filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( Before.NAME ) != null;
}
@Override
public Object visit(Begins filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( Begins.NAME ) != null;
}
@Override
public Object visit(BegunBy filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( BegunBy.NAME ) != null;
}
@Override
public Object visit(During filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( During.NAME ) != null;
}
@Override
public Object visit(EndedBy filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( EndedBy.NAME ) != null;
}
@Override
public Object visit(Ends filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( Ends.NAME ) != null;
}
@Override
public Object visit(Meets filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( Meets.NAME ) != null;
}
@Override
public Object visit(MetBy filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( MetBy.NAME ) != null;
}
@Override
public Object visit(OverlappedBy filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( OverlappedBy.NAME ) != null;
}
@Override
public Object visit(TContains filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( TContains.NAME ) != null;
}
@Override
public Object visit(TEquals filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( TEquals.NAME ) != null;
}
@Override
public Object visit(TOverlaps filter, Object extraData) {
final TemporalCapabilities temporal = capabilities.getTemporalCapabilities();
if( temporal == null ) return false;
final TemporalOperators operators = temporal.getTemporalOperators();
if( operators == null ) return false;
return operators.getOperator( TOverlaps.NAME ) != null;
}
@Override
public Object visitNullFilter( final Object extraData ) {
return false;
}
//
// Expressions
//
/** NilExpression is a placeholder and is never supported */
@Override
public Object visit( final NilExpression expression, final Object extraData ) {
return false;
}
@Override
public Object visit( final Add expression, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ArithmeticOperators operators = scalar.getArithmeticOperators();
if( operators == null ) return false;
return operators.hasSimpleArithmetic();
}
@Override
public Object visit( final Divide expression, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ArithmeticOperators operators = scalar.getArithmeticOperators();
if( operators == null ) return false;
return operators.hasSimpleArithmetic();
}
@Override
public Object visit( final Function function, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ArithmeticOperators operators = scalar.getArithmeticOperators();
if( operators == null ) return false;
final Functions functions = operators.getFunctions();
if( functions == null ) return false;
// Note that only function name is checked here
final FunctionName found = functions.getFunctionName( function.getName() );
// And that's enough to assess if the function is supported
return found != null;
}
@Override
public Object visit( final Literal expression, final Object extraData ) {
return true;
}
@Override
public Object visit( final Multiply expression, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ArithmeticOperators operators = scalar.getArithmeticOperators();
if( operators == null ) return false;
return operators.hasSimpleArithmetic();
}
/**
* You can override this to perform a sanity check against a provided
* FeatureType.
*/
@Override
public Object visit( final PropertyName expression, final Object extraData ) {
return true;
}
@Override
public Object visit( final Subtract expression, final Object extraData ) {
final ScalarCapabilities scalar = capabilities.getScalarCapabilities();
if( scalar == null ) return false;
final ArithmeticOperators operators = scalar.getArithmeticOperators();
if( operators == null ) return false;
return operators.hasSimpleArithmetic();
}
}