/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* 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.geotools.filter.text.commons;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import org.geotools.filter.IllegalFilterException;
import org.geotools.filter.text.cql2.CQLException;
import org.geotools.referencing.crs.DefaultGeographicCRS;
import org.opengis.filter.And;
import org.opengis.filter.Filter;
import org.opengis.filter.FilterFactory;
import org.opengis.filter.FilterFactory2;
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.PropertyIsNull;
import org.opengis.filter.expression.BinaryExpression;
import org.opengis.filter.expression.Expression;
import org.opengis.filter.expression.Function;
import org.opengis.filter.expression.Literal;
import org.opengis.filter.expression.PropertyName;
import org.opengis.filter.spatial.BinarySpatialOperator;
import org.opengis.filter.spatial.DistanceBufferOperator;
import org.opengis.filter.temporal.After;
import org.opengis.filter.temporal.Before;
import org.opengis.filter.temporal.During;
import org.opengis.temporal.Period;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.LinearRing;
import com.vividsolutions.jts.geom.Polygon;
import com.vividsolutions.jts.io.WKTReader;
/**
*
* This abstract class provides the common behavior to build the filters for the related
* semantic actions of parsing language process.
*
* <p>
* Builds Filter or Expression and their components (literal, functions, etc).
* It maintains the results of semantic actions in the stack used to build complex
* filters and expressions.
* </p>
*
* <p>
* Warning: This component is not published. It is part of module implementation.
* Client module should not use this feature.
* </p>
*
* @author Mauricio Pazos (Axios Engineering)
* @since 2.6
*
*
* @source $URL$
*/
public abstract class AbstractFilterBuilder {
private static final String DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ss'Z'";
private final FilterFactory filterFactory;
private final BuildResultStack resultStack;
protected final String cqlSource;
/**
* New instance of FilterBuilder
* @param cqlSource
* @param filterFactory
*/
public AbstractFilterBuilder(final String cqlSource, final FilterFactory filterFactory){
assert cqlSource != null: "illegal argument";
assert filterFactory != null: "illegal argument";
this.cqlSource = cqlSource;
this.filterFactory = filterFactory;
this.resultStack = new BuildResultStack(cqlSource);
}
protected FilterFactory getFilterFactory(){
return this.filterFactory;
}
protected final BuildResultStack getResultStack(){
return this.resultStack;
}
protected final String getStatement(){
return this.cqlSource;
}
/**
* Adds in the result stack the partial result associated to node.
* @param built partial result
* @param token
* @param type node associated to partial result
*/
public void pushResult(final Result result) {
this.resultStack.push(result);
}
public Result peekResult() {
return this.resultStack.peek();
}
public Filter getFilter() throws CQLException {
return resultStack.popFilter();
}
public Expression getExpression() throws CQLException {
return resultStack.popExpression();
}
public List<Filter> getFilterList() throws CQLException {
int size = resultStack.size();
List<Filter> results = new ArrayList<Filter>(size);
for (int i = 0; i < size; i++) {
Result item = this.resultStack.popResult();
Filter result = (Filter)item.getBuilt();
results.add(0, result);
}
return results;
}
public BinaryExpression buildAddExpression() throws CQLException {
Expression right = this.resultStack.popExpression();
Expression left = this.resultStack.popExpression();
return filterFactory.add(left, right);
}
public BinaryExpression buildSubtractExression() throws CQLException {
Expression right = this.resultStack
.popExpression();
Expression left = this.resultStack
.popExpression();
return filterFactory.subtract(left, right);
}
public BinaryExpression buildMultiplyExpression() throws CQLException {
Expression right = this.resultStack.popExpression();
Expression left = this.resultStack.popExpression();
return filterFactory.multiply(left, right);
}
public BinaryExpression buildDivideExpression() throws CQLException {
Expression right = this.resultStack.popExpression();
Expression left = this.resultStack.popExpression();
return filterFactory.divide(left, right);
}
public Filter buildAndFilter() throws CQLException {
Filter right = this.resultStack.popFilter();
Filter left = this.resultStack.popFilter();
Filter logicFilter = null;
if (Filter.INCLUDE.equals(right)) {
logicFilter = left;
} else if (Filter.INCLUDE.equals(left)) {
logicFilter = right;
} else if (Filter.EXCLUDE.equals(right)
|| Filter.EXCLUDE.equals(left)) {
logicFilter = Filter.EXCLUDE;
} else {
logicFilter = filterFactory.and(left, right);
}
return logicFilter;
}
public Filter buildOrFilter() throws CQLException {
Filter right = this.resultStack.popFilter();
Filter left = this.resultStack.popFilter();
Filter logicFilter = null;
if (Filter.INCLUDE.equals(right) || Filter.INCLUDE.equals(left)) {
logicFilter = Filter.INCLUDE;
} else if (Filter.EXCLUDE.equals(left)) {
logicFilter = right;
} else if (Filter.EXCLUDE.equals(right)) {
logicFilter = left;
} else {
logicFilter = filterFactory.or(left, right);
}
return logicFilter;
}
public Filter buildNotFilter() throws CQLException {
Filter right = this.resultStack.popFilter();
Filter logicFilter = null;
if (Filter.INCLUDE.equals(right)) {
logicFilter = Filter.EXCLUDE;
} else if (Filter.EXCLUDE.equals(right)) {
logicFilter = Filter.INCLUDE;
} else {
logicFilter = filterFactory.not(right);
}
return logicFilter;
}
/**
* Builds a like filter
*
* @matchCase
*
* @return a PropertyIsLike
* @throws CQLException
*/
public PropertyIsLike buildLikeFilter(boolean matchCase) throws CQLException {
final String WC_MULTI = "%";
final String WC_SINGLE = "_";
final String ESCAPE = "\\";
try {
org.opengis.filter.expression.Expression pattern = this.resultStack
.popExpression();
org.opengis.filter.expression.Expression expr = this.resultStack
.popExpression();
PropertyIsLike f = filterFactory.like(expr, pattern.toString(),
WC_MULTI, WC_SINGLE, ESCAPE, matchCase);
return f;
} catch (IllegalFilterException ife) {
throw new CQLException("Exception building LikeFilter: " + ife.getMessage(), this.cqlSource);
}
}
/**
* Builds property is null filter
*
* @return PropertyIsNull
* @throws CQLException
*/
public PropertyIsNull buildPropertyIsNull() throws CQLException {
try {
org.opengis.filter.expression.Expression property = this.resultStack
.popExpression();
PropertyIsNull filter = filterFactory.isNull(property);
return filter;
} catch (CQLException e) {
throw new CQLException("Exception building Null Predicate", this.cqlSource);
}
}
public Not buildPorpertyNotIsNull() throws CQLException {
return filterFactory.not( this.buildPropertyIsNull() );
}
/**
* builds PropertyIsBetween filter
*
* @return PropertyIsBetween
* @throws CQLException
*/
public PropertyIsBetween buildBetween() throws CQLException {
try {
org.opengis.filter.expression.Expression sup = this.resultStack
.popExpression();
org.opengis.filter.expression.Expression inf = this.resultStack
.popExpression();
org.opengis.filter.expression.Expression expr = this.resultStack
.popExpression();
PropertyIsBetween filter = filterFactory.between(expr, inf, sup);
return filter;
} catch (IllegalFilterException ife) {
throw new CQLException("Exception building CompareFilter: "+ ife.getMessage(), this.cqlSource);
}
}
public Not buildNotBetween() throws CQLException {
return filterFactory.not(buildBetween());
}
public Not buildNotLikeFilter(boolean matchCase) throws CQLException {
Not filter = filterFactory.not(buildLikeFilter(matchCase));
return filter;
}
/**
* Creates PropertyIsEqualTo with PropertyExists predicate
*
* @return PropertyIsEqualTo
* @throws CQLException
*/
public PropertyIsEqualTo buildPropertyExists() throws CQLException {
PropertyName property = this.resultStack.popPropertyName();
org.opengis.filter.expression.Expression[] args = new org.opengis.filter.expression.Expression[1];
args[0] = filterFactory.literal(property);
Function function = filterFactory.function("PropertyExists", args);
Literal literalTrue = filterFactory.literal(Boolean.TRUE);
PropertyIsEqualTo propExistsFilter = filterFactory.equals(function,
literalTrue);
return propExistsFilter;
}
/**
* Creates a literal with date time
*
* @param n
* with date time
* @return Literal
* @throws CQLException
*/
public Literal buildDateTimeExpression(final IToken token)
throws CQLException {
return asLiteralDate(token.toString());
}
private Literal asLiteralDate(final String strDate) throws CQLException {
try {
DateFormat formatter = new SimpleDateFormat(DATE_FORMAT);
Date dateTime = formatter.parse(strDate);
Literal literalDate = filterFactory.literal(dateTime);
return literalDate;
} catch (java.text.ParseException e) {
throw new CQLException("Unsupported date time format: "
+ e.getMessage(), this.cqlSource);
}
}
public Not buildNotFilter(Filter eq) {
return filterFactory.not(eq);
}
public Literal buildTrueLiteral() {
return filterFactory.literal(Boolean.TRUE);
}
public Literal buildFalseLiteral() {
return filterFactory.literal(Boolean.FALSE);
}
public Literal buildLiteralInteger(final String image) {
return filterFactory.literal(Long.parseLong(image));
}
public Literal buildLiteralDouble(final String tokenImage) {
return filterFactory.literal(Double.parseDouble(tokenImage));
}
public Literal buildLiteralString(final String tokenImage) {
String strLiteral = removeQuotes(tokenImage);
return filterFactory.literal(strLiteral);
}
/**
* Removes initial and final "'" from string. If some "''" is found
* it will be changed by a single quote "'".
*
* @param source
* @return string without initial and final quote, and "''" replaced
* by "'".
*/
protected String removeQuotes(final String source){
// checks if it has initial an final quote
final String quote = "'";
if( !( source.startsWith(quote) && source.endsWith(quote)) ){
return source;
}
int length = source.length();
// removes the first and last quote
String result = source.substring(1,length -1);
// removes internal quotes
result = result.replaceAll("''", "'");
return result;
}
public String buildIdentifier(final int nodeIdentifier) throws CQLException {
// precondition: the stack have one or more identifier part parts
try {
// retrieves all part of identifier from result stack
ArrayList<String> arrayParts = new ArrayList<String>();
while (this.resultStack.size() > 0) {
Result r = this.resultStack.peek();
if (r.getNodeType() != nodeIdentifier) {
break;
}
String part = this.resultStack.popIdentifierPart();
part = removeFirstAndLastDoubleQuote(part);
arrayParts.add(part);
}
assert arrayParts.size() >= 1 : "postcondition: the list of identifier part must have one or more elements ";
// makes the identifier
StringBuffer identifier = new StringBuffer(100);
String part;
int i = 0;
for (i = arrayParts.size() - 1; i > 0; i--) {
part = (String) arrayParts.get(i);
identifier.append(part).append(":");
}
assert i== 0;
part = arrayParts.get(i);
identifier.append(part);
return identifier.toString();
} catch (CQLException e) {
throw new CQLException("Fail builing identifier: " + e.getMessage(), this.cqlSource);
}
}
/**
* Creates the identifier part. An identifier like "idpart1:idpart2:idpart3:
* ... idpartN" has N part.
*
* @return identifier part
*/
public String buildIdentifierPart(IToken token) {
String part = token.toString();
return part;
}
/**
* Removes the initial and final double quote. If the source string has not double quotes the
* source is returned without changes.
* @param source
* @return the source without double quotes (initial and final)
*/
private String removeFirstAndLastDoubleQuote(String source) {
// checks if it has initial an final quote
final String doubleQuote = "\"";
if( !( source.startsWith(doubleQuote) && source.endsWith(doubleQuote)) ){
return source; // return without changes
}
// removes the first and last quote
String result = source.substring(1,source.length() -1);
return result;
}
public PropertyName buildSimpleAttribute() throws CQLException {
// Only retrieve the identifier built before
String identifier = this.resultStack.popIdentifier();
PropertyName property = filterFactory.property(identifier);
return property;
}
/**
*
* @param nodeSimpleAttr
* @param nodeAttrSeparator
* @return PropertyName
* @throws CQLException
*/
public PropertyName buildCompoundAttribute(final int nodeSimpleAttr,
final String nodeAttrSeparator )
throws CQLException {
ArrayList<String> arrayIdentifiers = new ArrayList<String>();
// precondition: stack has one or more simple attributes
while (this.resultStack.size() > 0) {
Result r = this.resultStack.peek();
if (r.getNodeType() !=nodeSimpleAttr ) {
break;
}
PropertyName simpleAttribute = this.resultStack.popPropertyName();
arrayIdentifiers.add(simpleAttribute.getPropertyName());
}
// postcondition: array has one or more simple attribute
StringBuffer attribute = new StringBuffer(100);
int i = 0;
for (i = arrayIdentifiers.size() - 1; i > 0; i--) {
attribute.append(arrayIdentifiers.get(i));
attribute.append(nodeAttrSeparator);
}
attribute.append(arrayIdentifiers.get(i));
PropertyName property = filterFactory.property(attribute.toString());
return property;
}
public Literal buildDistanceUnit(IToken token) throws CQLException {
Literal unit = null;
unit = filterFactory.literal(token.toString());
return unit;
}
public Literal buildTolerance() throws CQLException {
Literal tolerance = null;
try {
tolerance = this.resultStack.popLiteral();
return tolerance;
} catch (NumberFormatException e) {
throw new CQLException("Unsupported number format",this.cqlSource);
}
}
public BinarySpatialOperator buildSpatialEqualFilter() throws CQLException {
Literal geom = this.resultStack.popLiteral();
Expression property = this.resultStack.popExpression();
FilterFactory2 ff = (FilterFactory2) filterFactory; // TODO this cast must be removed. It depends of Geometry implementation
return ff.equal(property, geom);
}
public BinarySpatialOperator buildSpatialDisjointFilter() throws CQLException {
Literal geom = this.resultStack.popLiteral();
Expression property = this.resultStack.popExpression();
FilterFactory2 ff = (FilterFactory2) filterFactory; // TODO this cast must be removed. It depends of Geometry implementation
return ff.disjoint(property, geom);
}
public BinarySpatialOperator buildSpatialIntersectsFilter() throws CQLException {
Literal geom = this.resultStack.popLiteral();
Expression property = this.resultStack.popExpression();
FilterFactory2 ff = (FilterFactory2) filterFactory; // TODO this cast must be removed. It depends of Geometry implementation
return ff.intersects(property, geom);
}
public BinarySpatialOperator buildSpatialTouchesFilter() throws CQLException {
Literal geom = this.resultStack.popLiteral();
Expression property = this.resultStack.popExpression();
FilterFactory2 ff = (FilterFactory2) filterFactory; // TODO this cast must be removed. It depends of Geometry implementation
return ff.touches(property, geom);
}
public BinarySpatialOperator buildSpatialCrossesFilter() throws CQLException {
Literal geom = this.resultStack.popLiteral();
Expression property = this.resultStack.popExpression();
FilterFactory2 ff = (FilterFactory2) filterFactory; // TODO this cast must be removed. It depends of Geometry implementation
return ff.crosses(property, geom);
}
public BinarySpatialOperator buildSpatialWithinFilter() throws CQLException {
Literal geom = this.resultStack.popLiteral();
Expression property = this.resultStack.popExpression();
FilterFactory2 ff = (FilterFactory2) filterFactory; // TODO this cast must be removed. It depends of Geometry implementation
return ff.within(property, geom);
}
public BinarySpatialOperator buildSpatialContainsFilter() throws CQLException {
Literal geom = this.resultStack.popLiteral();
Expression property = this.resultStack.popExpression();
FilterFactory2 ff = (FilterFactory2) filterFactory; // TODO this cast must be removed. It depends of Geometry implementation
return ff.contains(property, geom);
}
public BinarySpatialOperator buildSpatialOverlapsFilter() throws CQLException {
Literal geom = this.resultStack.popLiteral();
Expression property = this.resultStack.popExpression();
FilterFactory2 ff = (FilterFactory2) filterFactory; // TODO this cast must be removed. It depends of Geometry implementation
return ff.overlaps(property, geom);
}
public org.opengis.filter.spatial.BBOX buildBBox() throws CQLException{
return buildBbox(null);
}
public org.opengis.filter.spatial.BBOX buildBBoxWithCRS()
throws CQLException {
String crs = this.resultStack.popStringValue();
assert crs != null;
return buildBbox(crs);
}
private org.opengis.filter.spatial.BBOX buildBbox(final String crs) throws CQLException{
double maxY = this.resultStack.popDoubleValue();
double maxX = this.resultStack.popDoubleValue();
double minY = this.resultStack.popDoubleValue();
double minX = this.resultStack.popDoubleValue();
PropertyName property = this.resultStack.popPropertyName();
String strProperty = property.getPropertyName();
org.opengis.filter.spatial.BBOX bbox = filterFactory.bbox(
strProperty, minX, minY, maxX, maxY, crs);
return bbox;
}
public DistanceBufferOperator buildSpatialDWithinFilter() throws CQLException {
String unit = this.resultStack.popStringValue();
double tolerance = this.resultStack.popDoubleValue();
Expression geom = this.resultStack.popExpression();
Expression property = this.resultStack.popExpression();
FilterFactory2 ff = (FilterFactory2) filterFactory; // TODO this cast must be removed. It depends of Geometry implementation
return ff.dwithin(property, geom, tolerance, unit);
}
public DistanceBufferOperator buildSpatialBeyondFilter() throws CQLException {
String unit = this.resultStack.popStringValue();
double tolerance = this.resultStack.popDoubleValue();
Expression geom = this.resultStack.popExpression();
Expression property = this.resultStack.popExpression();
FilterFactory2 ff = (FilterFactory2) filterFactory; // TODO this cast must be removed. It depends of Geometry implementation
return ff.beyond(property, geom, tolerance, unit);
}
/**
* builds a PeriodNode (date1,date2)
*
* @return PeriodNode
*
* @throws CQLException
*/
public PeriodNode buildPeriodBetweenDates() throws CQLException {
org.opengis.filter.expression.Literal end = this.resultStack.popLiteral();
org.opengis.filter.expression.Literal begin = this.resultStack.popLiteral();
PeriodNode period = PeriodNode.createPeriodDateAndDate(begin, end);
return period;
}
/**
* builds a Period Node with (duration,date).
*
* @return PeriodNode
* @throws CQLException
*/
public PeriodNode buildPeriodDurationAndDate() throws CQLException {
Literal date = this.resultStack.popLiteral();
Literal duration = this.resultStack.popLiteral();
PeriodNode period = PeriodNode.createPeriodDurationAndDate(duration,
date, filterFactory);
return period;
}
/**
* builds a Period with (date,duration)
*
* @return PeriodNode
* @throws CQLException
*/
public PeriodNode buildPeriodDateAndDuration() throws CQLException {
Literal duration = this.resultStack.popLiteral();
Literal date = this.resultStack.popLiteral();
PeriodNode period = PeriodNode.createPeriodDateAndDuration(date,
duration, filterFactory);
return period;
}
/**
* Create an integer literal with duration value.
*
* @return Literal
*/
public org.opengis.filter.expression.Literal buildDurationExpression(final IToken token) {
String duration = token.toString();
org.opengis.filter.expression.Literal literalDuration = filterFactory
.literal(duration);
return literalDuration;
}
/**
* Create an AND filter with property between dates of period.
* (firstDate<= property <= lastDate)
*
* @return And filter
*
* @throws CQLException
*/
public And buildPropertyBetweenDates() throws CQLException {
// retrieves date and duration of expression
Result node = this.resultStack.popResult();
PeriodNode period = (PeriodNode) node.getBuilt();
Literal begin = period.getBeginning();
Literal end = period.getEnding();
// creates and filter firstDate<= property <= lastDate
Expression property = this.resultStack.popExpression();
And filter = filterFactory.and(filterFactory.lessOrEqual(begin,
property), filterFactory.lessOrEqual(property, end));
return filter;
}
/**
* Builds PropertyIsGreaterThanOrEqualTo begin of period
*
* @return PropertyIsGreaterThanOrEqualTo
* @throws CQLException
*/
public PropertyIsGreaterThanOrEqualTo buildPropertyIsGTEFirstDate()
throws CQLException {
Result node = this.resultStack.popResult();
PeriodNode period = (PeriodNode) node.getBuilt();
org.opengis.filter.expression.Literal begin = period.getBeginning();
org.opengis.filter.expression.Expression property = (org.opengis.filter.expression.Expression) resultStack
.popExpression();
PropertyIsGreaterThanOrEqualTo filter = filterFactory.greaterOrEqual(
property, begin);
return filter;
}
/**
* creates PropertyIsGreaterThan end date of period
*
* @return PropertyIsGreaterThan
*
* @throws CQLException
*/
public PropertyIsGreaterThan buildPropertyIsGTLastDate()
throws CQLException {
Result node = this.resultStack.popResult();
PeriodNode period = (PeriodNode) node.getBuilt();
org.opengis.filter.expression.Literal date = period.getEnding();
org.opengis.filter.expression.Expression property = this.resultStack
.popExpression();
PropertyIsGreaterThan filter = filterFactory.greater(property, date);
return filter;
}
/**
* @return PropertyIsLessThan
* @throws CQLException
*/
public PropertyIsLessThan buildPropertyIsLTFirsDate() throws CQLException {
PeriodNode period = this.resultStack.popPeriodNode();
org.opengis.filter.expression.Literal date = period.getBeginning();
org.opengis.filter.expression.Expression property = this.resultStack
.popExpression();
PropertyIsLessThan filter = filterFactory.less(property, date);
return filter;
}
/**
*
* @return PropertyIsLessThanOrEqualTo
* @throws CQLException
*/
public PropertyIsLessThanOrEqualTo buildPropertyIsLTELastDate()
throws CQLException {
PeriodNode period = this.resultStack.popPeriodNode();
org.opengis.filter.expression.Literal date = period.getEnding();
org.opengis.filter.expression.Expression property = this.resultStack
.popExpression();
PropertyIsLessThanOrEqualTo filter = filterFactory.lessOrEqual(
property, date);
return filter;
}
/**
*
* @return PropertyIsEqualTo
* @throws CQLException
*/
public PropertyIsEqualTo buildEquals() throws CQLException {
Expression right = this.resultStack.popExpression();
Expression left = this.resultStack.popExpression();
return filterFactory.equals(left, right);
}
/**
*
* @return PropertyIsGreaterThan
* @throws CQLException
*/
public PropertyIsGreaterThan buildGreater() throws CQLException {
Expression right = this.resultStack.popExpression();
Expression left = this.resultStack.popExpression();
return filterFactory.greater(left, right);
}
/**
*
* @return PropertyIsLessThan
* @throws CQLException
*/
public PropertyIsLessThan buildLess() throws CQLException {
Expression right = this.resultStack.popExpression();
Expression left = this.resultStack.popExpression();
return filterFactory.less(left, right);
}
/**
*
* @return PropertyIsGreaterThanOrEqualTo
* @throws CQLException
*/
public PropertyIsGreaterThanOrEqualTo buildGreaterOrEqual() throws CQLException {
Expression right = this.resultStack.popExpression();
Expression left = this.resultStack.popExpression();
return filterFactory.greaterOrEqual(left, right);
}
/**
* @return PropertyIsLessThanOrEqualTo
* @throws CQLException
*/
public PropertyIsLessThanOrEqualTo buildLessOrEqual() throws CQLException {
Expression right = this.resultStack.popExpression();
Expression left = this.resultStack.popExpression();
return filterFactory.lessOrEqual(left, right);
}
/**
* Builds geometry
*
* @param geometry
* @return a geometry
* @throws CQLException
*/
public Literal buildGeometry(final IToken geometry) throws CQLException {
try {
String wktGeom = scanExpression(geometry);
// transforms wkt to vividsolution geometry
String vividGeom = transformWKTGeometry(wktGeom);
WKTReader reader = new WKTReader();
Geometry g = reader.read(vividGeom);
Literal literal = filterFactory.literal(g);
return literal;
} catch (com.vividsolutions.jts.io.ParseException e) {
throw new CQLException(e.getMessage(), geometry, e, this.cqlSource);
} catch (Exception e) {
throw new CQLException("Error building WKT Geometry: " + e.getMessage(),geometry, e, this.cqlSource);
}
}
/**
* Extracts expression between initial token and last token in buffer.
*
* @param initialToken
*
* @return String the expression
*/
protected String scanExpression(final IToken initialToken) {
IToken end = initialToken;
while (end.hasNext()) {
end = end.next();
}
String expr = cqlSource.substring(
initialToken.beginColumn() - 1, end.endColumn());
return expr;
}
/**
* This transformation is required because some geometries like
* <b>Multipoint</b> has different definition in vividsolucion library.
* <p>
*
* <pre>
* Then OGC require MULTIPOINT((1 2), (3 4))
* but vividsolunion works without point "(" ans ")"
* MULTIPOINT(1 2, 3 4)
* </pre>
*
* <p>
*
* @param wktGeom ogc wkt geometry
* @return String vividsolution geometry
*/
protected String transformWKTGeometry(final String wktGeom) {
final String MULTIPOINT_TYPE = "MULTIPOINT";
StringBuffer transformed = new StringBuffer(30);
StringBuffer source = new StringBuffer(wktGeom.toUpperCase());
int cur = -1;
if ((cur = source.indexOf(MULTIPOINT_TYPE)) != -1) {
// extract "(" and ")" from points in arguments
String argument = source.substring(cur + MULTIPOINT_TYPE.length()
+ 1, source.length() - 1);
argument = argument.replace('(', ' ');
argument = argument.replace(')', ' ');
transformed.append(MULTIPOINT_TYPE).append("(").append(argument)
.append(")");
return transformed.toString();
} else {
return wktGeom;
}
}
/**
* Returns the Envelop
* @param token
* @return Literal
*/
public Literal buildEnvelop(IToken token) {
String source = scanExpression(token);
final String ENVELOPE_TYPE = "ENVELOPE";
int cur = source.indexOf(ENVELOPE_TYPE);
// transforms CQL envelop envelop(West,East,North,South) to
// GS84 West=minX, East=maxX, North=maxY, South=minY
double minX, minY, maxX, maxY;
cur = cur + ENVELOPE_TYPE.length() + 1;
String argument = source.substring(cur, source.length() - 1);
final String comma = ",";
cur = 0;
int end = argument.indexOf(comma, cur);
String west = argument.substring(cur, end);
minX = Double.parseDouble(west);
cur = end + 1;
end = argument.indexOf(comma, cur);
String east = argument.substring(cur, end);
maxX = Double.parseDouble(east);
cur = end + 1;
end = argument.indexOf(comma, cur);
String north = argument.substring(cur, end);
maxY = Double.parseDouble(north);
cur = end + 1;
String south = argument.substring(cur);
minY = Double.parseDouble(south);
// ReferencedEnvelope envelope = new
// ReferencedEnvelope(DefaultGeographicCRS.WGS84);
// envelope.init(minX, minY, maxX, maxY);
GeometryFactory gf = new GeometryFactory();
Coordinate[] coords = { new Coordinate(minX, minY),
new Coordinate(minX, maxY), new Coordinate(maxX, maxY),
new Coordinate(maxX, minY), new Coordinate(minX, minY) };
LinearRing shell = gf.createLinearRing(coords);
Polygon bbox = gf.createPolygon(shell, null);
bbox.setUserData(DefaultGeographicCRS.WGS84);
Literal literal = filterFactory.literal(bbox);
return literal;
}
/**
* Builds a function expression
*
* @param functionNode symbol used to identify the function node in parser tree
* @return Function
* @throws CQLException
*/
public Function buildFunction(final int functionNode) throws CQLException {
String functionName = null; // token.image;
// extracts the arguments from stack. Each argument in the stack
// is preceded by an argument node. Finally extracts the function name
List<Expression> argList = new LinkedList<Expression>();
while (!this.resultStack.empty()) {
Result node = this.resultStack.peek();
if (node.getNodeType() == functionNode ) {
// gets the function's name
Result funcNameNode = this.resultStack.popResult();
functionName = funcNameNode.getToken().toString();
break;
}
// ejects the argument node
this.resultStack.popResult();
// extracts the argument value
Expression arg = this.resultStack.popExpression();
argList.add(arg);
}
// Puts the argument in correct order
Collections.reverse(argList);
Expression[] args = (Expression[]) argList
.toArray(new Expression[argList.size()]);
Function function = null;
try{
function = filterFactory.function(functionName, args);
if (function == null) {
throw new CQLException("Function not found.", this.cqlSource);
}
} catch (Exception ex){
throw new CQLException("Function not found.", this.cqlSource);
}
return function;
}
/**
* Build an After date filter
*
* @return After
* @throws CQLException
*/
public After buildAfterDate() throws CQLException {
Expression right = this.resultStack.popExpression();
Expression left = this.resultStack.popExpression();
After filter = this.filterFactory.after(left, right);
return filter;
}
/**
* Builds an after period filter
*
* @return after
* @throws CQLException
*/
public After buildAfterPeriod()
throws CQLException {
Result node = this.resultStack.popResult();
PeriodNode period = (PeriodNode) node.getBuilt();
Literal date = period.getEnding();
Expression property = this.resultStack.popExpression();
After filter = filterFactory.after(property, date);
return filter;
}
public Before buildBeforeDate() throws CQLException {
Expression right = this.resultStack.popExpression();
Expression left = this.resultStack.popExpression();
Before filter = this.filterFactory.before(left, right);
return filter;
}
public Before buildBeforePeriod()
throws CQLException {
Result node = this.resultStack.popResult();
PeriodNode period = (PeriodNode) node.getBuilt();
Literal date = period.getEnding();
Expression property = this.resultStack.popExpression();
Before filter = filterFactory.before(property, date);
return filter;
}
public During buildDuringPeriod() throws CQLException {
// retrieves date and duration from expression
Period period = this.resultStack.popPeriod();
Expression property = this.resultStack.popExpression();
During filter = this.filterFactory.during(property, this.filterFactory.literal(period));
return filter;
}
/**
* Builds an Or filter composed of During and After.
*
* @return Or filter
* @throws CQLException
*/
public Or buildDuringOrAfter() throws CQLException{
Period period = this.resultStack.popPeriod();
PropertyName property = this.resultStack.popPropertyName();
// makes the after filter
After right = this.filterFactory.after(property, filterFactory.literal(period.getEnding()));
// makes the during filter
During left = this.filterFactory.during(property, this.filterFactory.literal(period));
Or filter = this.filterFactory.or(left, right);
return filter;
}
/**
* Builds an Or filter composed of Before and During filters.
*
* @return Or filter
* @throws CQLException
*/
public Or buildBeforeOrDuring() throws CQLException{
Period period = this.resultStack.popPeriod();
PropertyName property = this.resultStack.popPropertyName();
// makes the after filter
Before right = this.filterFactory.before(property, filterFactory.literal(period.getBeginning()));
// makes the during filter
During left = this.filterFactory.during(property, this.filterFactory.literal(period));
Or filter = this.filterFactory.or(right, left);
return filter;
}
}