Application: gvSIG desktop

package org.gvsig.expressionevaluator;

import org.gvsig.json.SupportJson;

import org.gvsig.tools.annotation.NotThreadSafe;

import org.gvsig.tools.evaluator.Evaluator;

import org.gvsig.tools.persistence.Persistent;

/**

 *

 * @author jjdelcerro

 */

@NotThreadSafe

public interface Expression extends Persistent, Cloneable, SupportJson {

    public static Expression cloneQuietly(Expression expression) {

        if( expression == null ) {

            return null;

        }

        try {

            return expression.clone();

        } catch (CloneNotSupportedException ex) {

            return null; // Esto nunca pasa.

        }

    }

    public void clear();

    /**

     * This symbol table don't persist with the expression.

     * 

     * @return the symbol table of the expression

     */

    public SymbolTable getSymbolTable();

    public String getPhrase();

    public Expression setPhrase(String phrase);

    public Object execute(SymbolTable symbolTable);

    public void link(SymbolTable symbolTable);    

    public Code getCode();

    @Deprecated

    public String toJSON();

    @Deprecated

    public void fromJSON(String json);

    public Expression clone() throws CloneNotSupportedException;

    public boolean isPhraseEmpty();

    public boolean isEmpty();

    public void setSQLCompatible(boolean sqlCompatible);

    public boolean isSQLCompatible();

    public void setUseBracketsForIdentifiers(boolean useBracketsForIdentifiers);

    public boolean getUseBracketsForIdentifiers();

    public Evaluator toEvaluator();

}