parseverb.java

来自「源码为科学出版社出版的英文<java设计模式>(影印版)所用的所有例」· Java 代码 · 共 40 行

import java.util.*;

public class ParseVerb extends ParseObject {
    static public final int PRINT=100, SORTBY=110, THENBY=120;
    protected Vector args;

    public ParseVerb(String s) {
        args = new Vector();
        s = s.toLowerCase();
        value = -1;
        type = VERB;
        if (s.equals("print")) value = PRINT;
        if (s.equals("sortby")) value = SORTBY;
    }
//-----------------------------------
    public ParseVerb getVerb(String s) {
        switch (value) {
        case PRINT:
            return new Print(s);
        case SORTBY:
            return new Sort(s);
        }
        return null;
    }
//-----------------------------------
    public void addArgs(MultVar mv) {
        args = mv.getVector();;
    }
//-----------------------------------
    public void addArgs(ParseObject p) {
        args.addElement(p);
    }
//-----------------------------------
    public boolean isLegal() {
        return(value >= 0);
    }

//-----------------------------------
}