package com.netsdk.common;
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import java.lang.reflect.Method;
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import java.util.NoSuchElementException;
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import java.util.Scanner;
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import java.util.Vector;
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public class CaseMenu {
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public static class Item {
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private Object object;
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private String itemName;
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private String methodName;
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public Item(Object object, String itemName, String methodName) {
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super();
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this.object = object;
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this.itemName = itemName;
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this.methodName = methodName;
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}
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public Object getObject() {
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return object;
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}
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public String getItemName() {
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return itemName;
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}
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public String getMethodName() {
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return methodName;
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}
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}
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private Vector<Item> items;
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public CaseMenu() {
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super();
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items = new Vector<Item>();
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}
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public void addItem(Item item) {
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items.add(item);
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}
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private void showItem() {
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final String format = "%2d\t%-20s\n";
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int index = 0;
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System.out.printf(format, index++, "exit App");
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for (Item item : items) {
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System.out.printf(format, index++, item.getItemName());
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}
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System.out.println("Please input a item index to invoke the method:");
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}
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public void run() {
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Scanner scanner = new Scanner(System.in);
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while(true) {
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showItem();
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try {
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int input = Integer.parseInt(scanner.nextLine());
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if (input <= 0 ) {
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System.err.println("input <= 0 || scanner.nextLine() == null");
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// scanner.close();
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// System.exit(0);
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break;
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}
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if (input < 0 || input > items.size()) {
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System.err.println("Input Error Item Index.");
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continue;
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}
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Item item = items.get(input - 1);
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Class<?> itemClass = item.getObject().getClass();
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Method method = itemClass.getMethod(item.getMethodName());
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method.invoke(item.getObject());
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} catch (NoSuchElementException e) {
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// scanner.close();
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// System.exit(0);
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break;
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} catch (NumberFormatException e) {
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System.err.println("Input Error NumberFormat.");
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continue;
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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scanner.close();
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}
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}
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