svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.remoteclient / src / main / java / org / gvsig / remoteclient / wfs / filters / AbstractFilter.java @ 40769
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.remoteclient.wfs.filters; |
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import java.io.ByteArrayInputStream; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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import java.util.StringTokenizer; |
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import java.util.Vector; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.fmap.geom.primitive.Envelope; |
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import org.gvsig.remoteclient.wfs.filters.operations.WFSEnvelopeFilterOperation; |
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import org.gvsig.remoteclient.wfs.filters.operations.WFSGeometryFilterOperation; |
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import org.gvsig.remoteclient.wfs.filters.operations.WFSSpatialFilterOperation; |
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/**
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* All classes that implement a "Query Language" must to inherit of
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* this class
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*
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* @author Jorge Piera Llodra (piera_jor@gva.es)
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*/
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public abstract class AbstractFilter implements Filter { |
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private BinaryTree root;
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private String currentClause; |
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private ISQLExpressionFormat formatter;
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private ArrayList spatialFilterOperations; |
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private ArrayList ids = null; |
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public AbstractFilter(ISQLExpressionFormat formatter){
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root = new BinaryTree();
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this.formatter = formatter;
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spatialFilterOperations = new ArrayList(); |
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} |
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/**
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* It returns the Query like a String
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*/
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public abstract String toString(BinaryTree tree, String version); |
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/**
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* returns the String that represents the logic
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* operator in this query language
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* @param operator
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* Logic operator
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* @return
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*/
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public abstract String getLogicalOperator(int operator); |
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/**
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* returns the String that represents the relational
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* operator in this query language
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* @param operator
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* Logic operator
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* @return
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*/
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public abstract String getRelationalOperator(int operator); |
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/**
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* returns the String that represents the geometric
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* operator in this query language
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* @param operator
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* Logic operator
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* @return
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*/
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public abstract String getGeometricOperator(int operator); |
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/**
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* returns the String that represents the separator
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* operator in this query language
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* @param separator
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* LSeparator "(" or ")"
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* @return
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*/
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public abstract String getSeparator(int separator); |
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/**
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* Adds a feature id
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* @param id
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* The feature id
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*/
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public void addFeatureById(Object id){ |
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if (ids == null){ |
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ids = new ArrayList(); |
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} |
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ids.add(id); |
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} |
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/**
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* @return the ids
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*/
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protected ArrayList getIds() { |
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return ids;
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} |
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public void setQueryByAttribute(String query){ |
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if (query != null){ |
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ByteArrayInputStream is = new ByteArrayInputStream(query.getBytes()); |
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String sql = formatter.format(query);
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if (sql != null){ |
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ParseExpressions expressions = new ParseExpressions();
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ArrayList tokens = expressions.parseExpression(sql);
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for (int i=0 ; i<tokens.size() ; i++){ |
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String token = (String)tokens.get(i); |
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root.addTerm(token); |
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} |
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} |
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} |
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} |
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/**
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* It adds a new property and value using the AND
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* operation
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* @param propertyName
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* @param propertyValue
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*/
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public void addAndClause(String propertyName, String propertyValue){ |
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root.addTerm(propertyName + " = " + propertyValue,
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getLogicalOperator(LOGICAL_OPERATOR_AND)); |
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} |
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public int getSpatialFiltersCount(){ |
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return spatialFilterOperations.size();
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} |
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public WFSSpatialFilterOperation getSpatialFilterAt(int index){ |
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if (index < spatialFilterOperations.size()){
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return (WFSSpatialFilterOperation)spatialFilterOperations.get(index);
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} |
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return null; |
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} |
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public void clearSpatialFilters(){ |
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spatialFilterOperations.clear(); |
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} |
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public void addSpatialFilter(WFSSpatialFilterOperation spatialOperation){ |
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if (spatialOperation != null){ |
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spatialFilterOperations.add(spatialOperation); |
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} |
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} |
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public void addSpatialFilter(Geometry geometry,String attributeName, String nameSpacePrefix, String nameSpaceLocation, String srs, int operation) { |
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addSpatialFilter(new WFSGeometryFilterOperation(geometry, operation, attributeName, nameSpacePrefix, nameSpaceLocation, srs));
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} |
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public void addSpatialFilter(String version, Envelope envelope, String attributeName, String nameSpacePrefix, String nameSpaceLocation, String srs, int operation) { |
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addSpatialFilter(new WFSEnvelopeFilterOperation(envelope, operation, attributeName, nameSpacePrefix, nameSpaceLocation, srs));
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} |
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public void addClause(String value){ |
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if (currentClause == null){ |
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currentClause = new String(""); |
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} |
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currentClause = currentClause + value; |
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} |
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public String toString(String version){ |
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if (currentClause != null){ |
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setQueryByAttribute(currentClause); |
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} |
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return toString(root, version);
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} |
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/**
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* Return true if the token is a operator
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* @param operator
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* @return
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*/
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public String getOperator(int operator){ |
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if (isLogical(operator)){
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return getLogicalOperator(operator);
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}else if(isRelational(operator)){ |
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return getRelationalOperator(operator);
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}else if(isGeometric(operator)){ |
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return getGeometricOperator(operator);
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} |
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return String.valueOf(operator); |
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} |
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public int getRelationalOperator(String operator){ |
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if (operator.equals("=")){ |
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return RELATIONAL_OPERATOR_IS_EQUALS_TO;
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}else if(operator.equals("!=")){ |
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return RELATIONAL_OPERATOR_IS_NOT_EQUALS_TO;
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}else if(operator.equals("<>")){ // This is another way to tell not-equal |
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return RELATIONAL_OPERATOR_IS_NOT_EQUALS_TO;
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}else if(operator.equals(">")){ |
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return RELATIONAL_OPERATOR_IS_GREATER_THAN;
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}else if(operator.equals(">=")){ |
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return RELATIONAL_OPERATOR_IS_GREATER_THAN_OR_EQUAL_TO;
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}else if(operator.equals("<")){ |
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return RELATIONAL_OPERATOR_IS_LESS_THAN;
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}else if(operator.equals("<=")){ |
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return RELATIONAL_OPERATOR_IS_LESS_THAN_OR_EQUAL_TO;
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}else if(operator.toUpperCase().equals("LIKE")){ |
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return RELATIONAL_OPERATOR_IS_LIKE;
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} |
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return RELATIONAL_OPERATOR_IS_EQUALS_TO;
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} |
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public int getLogicalOperator(String operator){ |
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if (operator.toUpperCase().equals("AND")){ |
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return LOGICAL_OPERATOR_AND;
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}else if(operator.toUpperCase().equals("NOT")){ |
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return LOGICAL_OPERATOR_NOT;
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}else if(operator.toUpperCase().equals("OR")){ |
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return LOGICAL_OPERATOR_OR;
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} |
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return LOGICAL_OPERATOR_AND;
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} |
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/**
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* Return true if is a geometric operator
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* @param type
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* @return
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*/
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private boolean isGeometric(int type) { |
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if ((type > 19) && (type < 40)){ |
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return true; |
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} |
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return false; |
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} |
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/**
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* Return true if is a relational operator
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* @param type
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* @return
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*/
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private boolean isRelational(int type) { |
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if ((type > 39) && (type < 60)){ |
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return true; |
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} |
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return false; |
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} |
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/**
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* Return true if is a logical operator
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* @param type
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* @return
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*/
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private boolean isLogical(int type){ |
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if ((type > 9) && (type < 20)){ |
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return true; |
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} |
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return false; |
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} |
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/**
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* Return true if is a seperator
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* @param type
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* @return
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*/
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private boolean isSeparator(int type){ |
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if ((type > 59) && (type < 70)){ |
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return true; |
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} |
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return false; |
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} |
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/**
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* Divide a line in a set of words
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* @param line
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* Line to divide
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* @param option
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* If the option is EXACT it returns the same line
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* @return Iteraror
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* A set of words
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*/
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public Iterator parseValues(String line, int option) { |
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Vector values = new Vector(); |
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if (option == CONCORDANCIA_EXACT) {
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values.add(line); |
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return values.iterator();
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} |
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StringTokenizer doubleQuotesTokenizer = new StringTokenizer(line, "\"", |
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true);
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boolean inside = false; |
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while (doubleQuotesTokenizer.hasMoreTokens()) {
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String token = doubleQuotesTokenizer.nextToken();
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if (token.equals("\"")) { |
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inside = !inside; |
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} else if (inside) { |
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values.add(token); |
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} else {
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StringTokenizer spaceTokenizer = new StringTokenizer(token, " "); |
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while (spaceTokenizer.hasMoreTokens()) {
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String value = spaceTokenizer.nextToken();
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values.add(value); |
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} |
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} |
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} |
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return values.iterator();
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} |
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} |