svn-gvsig-desktop / branches / v02_desarrollo / libraries / sld / temp / org.gvsig.sldsupport.lib.api / src / main / java / org / gvsig / sldsupport / filterencoding / operations / Expression.java @ 40779
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/* gvSIG. Sistema de Informaci�n Geogr�fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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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 2
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib��ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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package org.gvsig.sldsupport.filterencoding.operations; |
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import java.util.ArrayList; |
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/**
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* Interface that all the operators of an expression to be parsed
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* has to implement
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*
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* @author Pepe Vidal Salvador - jose.vidal.salvador@iver.es
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*/
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public interface Expression { |
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public String getName(); |
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/**
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* Returns true if the expression is correctly evaluated using the
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* HashTable for that
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*
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* @param symbol_table
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* @return
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* @throws ExpressionException
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*/
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public Object evaluate() throws ExpressionException; |
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/**
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* Returns an String containing the pattern for the operator. That is, the
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* type of its arguments and its solution
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*
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* @return String with the pattern
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*/
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public String getPattern(); |
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/**
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* Adds an argument (which is an Expression) to the operator in the
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* ith position.
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*
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* @param i position where the argument will be added
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* @param arg argument to be added
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*/
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public void addArgument(int i, Expression arg); |
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/**
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* Obtains the arguments of the Expression
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*
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* @return ArrayList with the arguments
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*/
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public ArrayList<Expression> getArguments() ; |
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/**
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* Sets the arguments of the Expression
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*
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* @param arguments
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*/
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public void setArguments(ArrayList<Expression> arguments); |
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/**
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* Checks if the semantic of the Expression is correct using for that
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* the values of the HashTable if it is necessary
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*
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* @param symbol_table which contains the symbols
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* @throws ExpressionException
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*/
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public void check() throws ExpressionException; |
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} |