1
22
23 package com.liferay.portlet.currencyconverter.util;
24
25 import com.liferay.portal.kernel.util.GetterUtil;
26 import com.liferay.portal.kernel.util.HttpUtil;
27 import com.liferay.portal.kernel.util.StringPool;
28 import com.liferay.portal.kernel.util.Time;
29 import com.liferay.portal.kernel.webcache.WebCacheException;
30 import com.liferay.portal.kernel.webcache.WebCacheItem;
31 import com.liferay.portlet.currencyconverter.model.Currency;
32
33 import java.util.StringTokenizer;
34
35
41 public class CurrencyWebCacheItem implements WebCacheItem {
42
43 public CurrencyWebCacheItem(String symbol) {
44 _symbol = symbol;
45 }
46
47 public Object convert(String key) throws WebCacheException {
48 String symbol = _symbol;
49 double rate = 0.0;
50
51 try {
52 if (symbol.length() == 6) {
53 String fromSymbol = symbol.substring(0, 3);
54 String toSymbol = symbol.substring(3, 6);
55
56 if (!CurrencyUtil.isCurrency(fromSymbol) ||
57 !CurrencyUtil.isCurrency(toSymbol)) {
58
59 throw new WebCacheException(symbol);
60 }
61 }
62 else if (symbol.length() == 3) {
63 if (!CurrencyUtil.isCurrency(symbol)) {
64 throw new WebCacheException(symbol);
65 }
66 }
67 else {
68 throw new WebCacheException(symbol);
69 }
70
71 String text = HttpUtil.URLtoString(
72 "http://finance.yahoo.com/d/quotes.csv?s=" +
73 symbol + "=X&f=sl1d1t1c1ohgv&e=.csv");
74
75 StringTokenizer st = new StringTokenizer(text, StringPool.COMMA);
76
77
79 st.nextToken();
80
81 rate = GetterUtil.getDouble(
82 st.nextToken().replace('"', ' ').trim());
83 }
84 catch (Exception e) {
85 throw new WebCacheException(e);
86 }
87
88 return new Currency(symbol, rate);
89 }
90
91 public long getRefreshTime() {
92 return _REFRESH_TIME;
93 }
94
95 private static final long _REFRESH_TIME = Time.MINUTE * 20;
96
97 private String _symbol;
98
99 }