60 lines
1.7 KiB
Java
60 lines
1.7 KiB
Java
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import java.util.LinkedHashMap;
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import java.util.Map;
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import java.util.Scanner;
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/*
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* To change this license header, choose License Headers in Project Properties.
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* To change this template file, choose Tools | Templates
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* and open the template in the editor.
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*/
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/**
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*
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* @author jerrykwok
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*/
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public class CommandHandler {
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private LinkedHashMap<String, CommandFactory> mapCmds;
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private StateManager state;
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public CommandHandler(StateManager state) {
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this.mapCmds = new LinkedHashMap<String, CommandFactory>();
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this.state = state;
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}
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public void regCommand(String key, CommandFactory cmdFactory) {
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mapCmds.put(key, cmdFactory);
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}
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public void printCommandList() {
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System.out.print("Please enter command: [");
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System.out.print(String.join(" | ", mapCmds.keySet()));
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System.out.println("]");
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for (Map.Entry<String, CommandFactory> mapCmd : mapCmds.entrySet()) {
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System.out.print(mapCmd.getKey() + " = " + mapCmd.getValue().getCommandName());
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}
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System.out.println("\n");
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}
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public boolean run(String cmd) {
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CommandFactory commandFactory = mapCmds.get(cmd);
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if (commandFactory != null) {
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Command command = commandFactory.createCommand();
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boolean result = command.execute();
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if (result) {
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switch (cmd) {
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case "a":
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case "c":
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case "s":
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state.getUndoList().add(command);
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state.getRedoList().clear();
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}
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}
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return true;
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}
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return false;
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}
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}
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