Function.java

package com.gpsoft.jevalexpr.functions;
import com.gpsoft.jevalexpr.ExpBin;
import com.gpsoft.jevalexpr.Token;
import com.gpsoft.jevalexpr.TypeData;
import com.gpsoft.jevalexpr.TypeStep;
import com.gpsoft.jevalexpr.TypeToken;
import com.gpsoft.jevalexpr.ValueType;

/**
 * This abstract class represents prototype of functions
 * 
 * @author Giovanni palleschi
 * @version 1.0.0
 *
 */
public abstract class Function {

	String name;
	Token<Object> token;
	
	TypeToken typeToken;
	int operatorSyntaxType;
	int operatorPriority;
	int idxPartOpe;
	ValueType valueType;
	TypeStep typeStep;
	int stepRef;
	TypeData typeData;

	/**
	 * This method checks function, number of arguments, types, ...
	 * 
	 * @param expBin
	 * @param stepIdx
	 * @return boolean (true if it's ok false is nok)
	 */
	
	public boolean check(ExpBin<?> expBin, int stepIdx) {
		return false;
	}
	
	/**
	 * This method execute function
	 * 
	 * @param expBin
	 * @param stepIdx
	 * @return boolean (true if it's ok false is nok)
	 */
	
	public boolean exec(ExpBin<?> expBin, int stepIdx) {
		return false;
	}
	public String getName() {
		return name;
	}

	public TypeToken getTypeToken() {
		return typeToken;
	}

	public int getOperatorSyntaxType() {
		return operatorSyntaxType;
	}

	public int getOperatorPriority() {
		return operatorPriority;
	}

	public int getIdxPartOpe() {
		return idxPartOpe;
	}

	public ValueType getValueType() {
		return valueType;
	}

	public TypeStep getTypeStep() {
		return typeStep;
	}

	public int getStepRef() {
		return stepRef;
	}

	public TypeData getTypeData() {
		return typeData;
	}
	
	public void checkBefore(String substring, int expPos) {
	}
}