init code

[vfc/nfvo/wfengine.git] / wso2 / baseservice-i18n / src / main / java / org / openo / baseservice / i18n / I18nJsonUtil.java

diff --git a/wso2/baseservice-i18n/src/main/java/org/openo/baseservice/i18n/I18nJsonUtil.java b/wso2/baseservice-i18n/src/main/java/org/openo/baseservice/i18n/I18nJsonUtil.java
new file mode 100644 (file)
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--- /dev/null
+++ b/wso2/baseservice-i18n/src/main/java/org/openo/baseservice/i18n/I18nJsonUtil.java
@@ -0,0 +1,170 @@
+/**
+ * Copyright 2017 ZTE Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.openo.baseservice.i18n;
+
+import com.fasterxml.jackson.core.JsonParseException;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Locale;
+import java.util.Set;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+final class I18nJsonUtil {
+
+    private static I18nJsonUtil util;
+    private static Lock lock = new ReentrantLock();
+    private ObjectMapper objectMapper;
+
+    public I18nJsonUtil(ObjectMapper objectMapper) {
+        this.objectMapper = objectMapper;
+    }
+
+    <T extends Object> T readFromJson(InputStream ins, Class<T> clazz)
+        throws JsonParseException, JsonMappingException, IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        byte[] bs = new byte[1024 * 10];
+        int length = -1;
+        while ((length = ins.read(bs)) > 0) {
+            baos.write(bs, 0, length);
+        }
+        bs = baos.toByteArray();
+
+        byte[] ubs = null;
+        if (bs.length > 3) {
+            // 删除bom头 -17, -69, -65
+            if (bs[0] == -17 && bs[1] == -69 && bs[2] == -65) {
+                ubs = new byte[bs.length - 3];
+                System.arraycopy(bs, 3, ubs, 0, ubs.length);
+            }
+        }
+        if (ubs == null) {
+            ubs = bs;
+        }
+        return objectMapper.readValue(ubs, clazz);
+    }
+
+    <T extends Object> T readFromJson(String str, Class<T> clazz)
+        throws JsonParseException, JsonMappingException, IOException {
+        return objectMapper.readValue(str, clazz);
+    }
+
+    String writeToJson(Object obj) throws JsonProcessingException {
+        return objectMapper.writeValueAsString(obj);
+    }
+
+    static I18nJsonUtil getInstance(ObjectMapper objectMapper) {
+        if (util == null) {
+            lock.lock();
+            try {
+                if (util == null) {
+                    if (objectMapper == null) {
+                        objectMapper = new ObjectMapper();
+                    }
+                    util = new I18nJsonUtil(objectMapper);
+                }
+            } finally {
+                lock.unlock();
+            }
+        }
+        return util;
+    }
+
+    static I18nJsonUtil getInstance() {
+        return getInstance(null);
+    }
+}
+
+
+/**
+ * 国际化转换工具
+ *
+ * @author 10163976
+ */
+class I18nLocaleTransfer {
+
+    private static Logger LOG = LoggerFactory.getLogger(I18nLocaleTransfer.class);
+
+    /**
+     * 方言转换<br> 如果存在直接返回<br> 如果不存在，则获取语言进行模糊匹配，未匹配上则返回默认方言<br>
+     *
+     * @param theLocale 待转换方言
+     * @param locales 存在的方言
+     * @return 转换后的方言
+     */
+    public static String transfer(Locale theLocale, Set<String> locales) {
+        if (locales == null || locales.isEmpty()) {
+            LOG.debug("locales is NULL or empty");
+            return null;
+        }
+        if (theLocale == null) {
+            String result = fetchDefault(locales);
+            LOG.debug("transfer NULL --> " + result + " in " + locales);
+            return result;
+        }
+        String locale = theLocale.toString();
+        if (locale.isEmpty()) {
+            String result = fetchDefault(locales);
+            LOG.debug("transfer EMPTY --> " + result + " in " + locales);
+            return result;
+        }
+        // 精确匹配
+        if (locales.contains(locale)) {
+            return locale;
+        }
+
+        // 根据语言模糊匹配
+        String language = theLocale.getLanguage();
+        if (locales.contains(language)) {
+            LOG.debug("transfer " + locale + " --> " + language + " in " + locales);
+            return language;
+        }
+
+        language = language + "_";
+        for (String temp : locales) {
+            if (temp.startsWith(language)) {
+                LOG.debug("transfer " + locale + " --> " + temp + " in " + locales);
+                return temp;
+            }
+        }
+        String result = fetchDefault(locales);
+        LOG.debug("transfer " + locale + " --> " + result + " in " + locales);
+        return result;
+    }
+
+    /**
+     * 返回默认方言，优先级为en,en_US,zh,zh_CN，如果都不存在，则随机返回一个
+     */
+    private static String fetchDefault(Set<String> locales) {
+        if (locales.contains("en")) {
+            return "en";
+        } else if (locales.contains("en_US")) {
+            return "en_US";
+        }
+        if (locales.contains("zh")) {
+            return "zh";
+        } else if (locales.contains("zh_CN")) {
+            return "zh_CN";
+        }
+        return locales.iterator().next();
+    }
+}