FilterNode、FilterJoinNode增加copy方法

src/org/redkale/source/FilterJoinNode.java

@@ -82,6 +82,18 @@ public class FilterJoinNode extends FilterNode {
         return new FilterJoinNode(joinClass, joinColumns, column, express, itemand, value);
     }
 
+    @Override
+    public FilterJoinNode copy() {
+        FilterJoinNode node = (FilterJoinNode) copy(new FilterJoinNode());
+        node.joinClass = this.joinClass;
+        node.joinEntity = this.joinEntity;
+        if (this.joinColumns != null) {
+            node.joinColumns = new String[this.joinColumns.length];
+            System.arraycopy(this.joinColumns, 0, node.joinColumns, 0, this.joinColumns.length);
+        }
+        return node;
+    }
+
     @Override
     protected FilterNode any(final FilterNode node0, boolean signor) {
         Objects.requireNonNull(node0);

src/org/redkale/source/FilterNode.java

@@ -82,6 +82,26 @@ public class FilterNode {  //FilterNode 不能实现Serializable接口， 否则
         this.value = val;
     }
 
+    public FilterNode copy() {
+        return copy(new FilterNode());
+    }
+
+    protected FilterNode copy(FilterNode node) {
+        node.readOnly = this.readOnly;
+        node.column = this.column;
+        node.express = this.express;
+        node.value = this.value;
+        node.itemand = this.itemand;
+        node.or = this.or;
+        if (this.nodes != null) {
+            node.nodes = new FilterNode[this.nodes.length];
+            for (int i = 0; i < node.nodes.length; i++) {
+                node.nodes[i] = this.nodes[i] == null ? null : this.nodes[i].copy();
+            }
+        }
+        return node;
+    }
+
     public FilterNode asReadOnly() {
         this.readOnly = true;
         return this;