first commit

src/com/sipai/activiti/util/LinkedProperties.java

@@ -0,0 +1,93 @@
+package com.sipai.activiti.util;
+
+import java.io.PrintStream;
+import java.io.PrintWriter;
+import java.util.*;
+
+/**
+ * 有序Properties
+ */
+public class LinkedProperties extends Properties {
+    private static final long serialVersionUID = 1L;
+    private Map<Object, Object> linkMap = new LinkedHashMap<Object, Object>();
+
+    public void clear() {
+        linkMap.clear();
+    }
+
+    public boolean contains(Object value) {
+        return linkMap.containsValue(value);
+    }
+
+    public boolean containsKey(Object key) {
+        return linkMap.containsKey(key);
+    }
+
+    public boolean containsValue(Object value) {
+        return linkMap.containsValue(value);
+    }
+
+    public Enumeration elements() {
+        throw new RuntimeException("Method elements is not supported in LinkedProperties class");
+    }
+
+    public Set entrySet() {
+        return linkMap.entrySet();
+    }
+
+    public boolean equals(Object o) {
+        return linkMap.equals(o);
+    }
+
+    public Object get(Object key) {
+        return linkMap.get(key);
+    }
+
+    public String getProperty(String key) {
+        Object oval = get(key); //here the class Properties uses super.get()
+        if (oval == null) return null;
+        return (oval instanceof String) ? (String) oval : null; //behavior of standard properties
+    }
+
+    public boolean isEmpty() {
+        return linkMap.isEmpty();
+    }
+
+    public Enumeration keys() {
+        Set keys = linkMap.keySet();
+        return Collections.enumeration(keys);
+    }
+
+    public Set keySet() {
+        return linkMap.keySet();
+    }
+
+    public void list(PrintStream out) {
+        this.list(new PrintWriter(out, true));
+    }
+
+    public void list(PrintWriter out) {
+        out.println("-- listing properties --");
+        for (Map.Entry e : (Set<Map.Entry>) this.entrySet()) {
+            String key = (String) e.getKey();
+            String val = (String) e.getValue();
+            if (val.length() > 40) {
+                val = val.substring(0, 37) + "...";
+            }
+            out.println(key + "=" + val);
+        }
+    }
+
+    public Object put(Object key, Object value) {
+        return linkMap.put(key, value);
+    }
+
+    public int size() {
+        return linkMap.size();
+    }
+
+    public Collection values() {
+        return linkMap.values();
+    }
+
+}