| CurrencyWebCacheItem.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 *
5 *
6 *
7 * The contents of this file are subject to the terms of the Liferay Enterprise
8 * Subscription License ("License"). You may not use this file except in
9 * compliance with the License. You can obtain a copy of the License by
10 * contacting Liferay, Inc. See the License for the specific language governing
11 * permissions and limitations under the License, including but not limited to
12 * distribution rights of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
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 /**
36 * <a href="CurrencyWebCacheItem.java.html"><b><i>View Source</i></b></a>
37 *
38 * @author Brian Wing Shun Chan
39 */
40 public class CurrencyWebCacheItem implements WebCacheItem {
41
42 public CurrencyWebCacheItem(String symbol) {
43 _symbol = symbol;
44 }
45
46 public Object convert(String key) throws WebCacheException {
47 String symbol = _symbol;
48 double rate = 0.0;
49
50 try {
51 if (symbol.length() == 6) {
52 String fromSymbol = symbol.substring(0, 3);
53 String toSymbol = symbol.substring(3, 6);
54
55 if (!CurrencyUtil.isCurrency(fromSymbol) ||
56 !CurrencyUtil.isCurrency(toSymbol)) {
57
58 throw new WebCacheException(symbol);
59 }
60 }
61 else if (symbol.length() == 3) {
62 if (!CurrencyUtil.isCurrency(symbol)) {
63 throw new WebCacheException(symbol);
64 }
65 }
66 else {
67 throw new WebCacheException(symbol);
68 }
69
70 String text = HttpUtil.URLtoString(
71 "http://finance.yahoo.com/d/quotes.csv?s=" +
72 symbol + "=X&f=sl1d1t1c1ohgv&e=.csv");
73
74 StringTokenizer st = new StringTokenizer(text, StringPool.COMMA);
75
76 // Skip symbol
77
78 st.nextToken();
79
80 rate = GetterUtil.getDouble(
81 st.nextToken().replace('"', ' ').trim());
82 }
83 catch (Exception e) {
84 throw new WebCacheException(e);
85 }
86
87 return new Currency(symbol, rate);
88 }
89
90 public long getRefreshTime() {
91 return _REFRESH_TIME;
92 }
93
94 private static final long _REFRESH_TIME = Time.MINUTE * 20;
95
96 private String _symbol;
97
98 }