Application: gvSIG desktop

package org.gvsig.expressionevaluator;

import org.gvsig.expressionevaluator.ExpressionBuilder.Value;

import org.gvsig.tools.visitor.Visitable;

public interface Code extends Visitable {

    public static final int UNDEFINED = -1;

    public static final int CONSTANT = 0;

    public static final int IDENTIFIER = 1;

    public static final int CALLABLE = 2;

    public static final int METHOD = 3;

    public static final int CODES = 4;

    public interface Constant extends Code {

        public Object value();

    }

    public interface Identifier extends Code {

        public String name();

    }

    public interface Callable extends Code {

        public static final int FUNCTION = 0;

        public static final int BINARY_OPERATOR = 1;

        public static final int UNARY_OPERATOR = 2;

        public String name();

        public Object call(Interpreter interpreter, Object[] args) throws Exception;

        public Function function();

        public Function function(Function function);

        public Codes parameters();

        public int type();

    }

    public interface Method extends Code {

        public Code instance();

        public String methodname();

        public Codes parameters();

        public Object call(Interpreter interpreter, Object[] args) throws Exception;

    }

    public static final Formatter<Code> EMPTY_FORMATTER = new Formatter<Code>() {

        @Override

        public boolean canApply(Code value) {

            return false;

        }

        @Override

        public String format(Code value) {

            return "";

        }

    };

    public int code();

    public Value toValue();

    public Value toValue(ExpressionBuilder builder);

    public String toString(Formatter<Code> formatter);

    public void link(SymbolTable symbolTable);

    public void replace(Code target, Code replacement);

}