Add Language.java in 'common' module

common/src/main/java/org/zhdev/language/Language.java

@@ -0,0 +1,54 @@
+package org.zhdev.language;
+
+import org.zhdev.util.StringUtils;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class Language {
+    protected final Map<String, PhraseSection> sectionMap = new HashMap<>();
+
+    public String getPhrase(String sectionKey, String phraseKey, Object... params) {
+        PhraseSection section = sectionMap.get(sectionKey);
+        if (section == null) {
+            return sectionKey + ':' + phraseKey;
+        }
+
+        String phrase = section.getOrDefault(phraseKey, phraseKey);
+        return phrase == null ? sectionKey + ':' + phraseKey : StringUtils.replaceKeyValue(phrase, params);
+    }
+
+    public String addPhrase(String sectionKey, String phraseKey, String phrase) {
+        PhraseSection section = sectionMap.computeIfAbsent(sectionKey, s -> new PhraseSection());
+        return section.put(phraseKey, phrase);
+    }
+
+    public String removePhrase(String sectionKey, String phraseKey) {
+        PhraseSection section = sectionMap.get(sectionKey);
+        return section == null ? null : (section.remove(phraseKey));
+    }
+
+    public int size() {
+        return sectionMap.size();
+    }
+
+    public int size(String sectionKey) {
+        PhraseSection section = sectionMap.get(sectionKey);
+        return section == null ? 0 : section.size();
+    }
+
+    public void clear() {
+        sectionMap.clear();
+    }
+
+    public boolean clear(String sectionKey) {
+        PhraseSection section = sectionMap.get(sectionKey);
+        if (section != null) {
+            section.clear();
+            return true;
+        }
+        return false;
+    }
+
+    private static class PhraseSection extends HashMap<String, String> {}
+}