src/com/wentch/redkale/source/FilterNode.java

@@ -0,0 +1,191 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package com.wentch.redkale.source;
+
+import java.io.*;
+import java.lang.reflect.*;
+import java.util.*;
+
+/**
+ *
+ * @author zhangjx
+ */
+public class FilterNode {
+
+    private boolean signand = true;
+
+    private String column;
+
+    private FilterExpress express;
+
+    private Serializable value;
+
+    private FilterNode[] siblings;
+
+    public FilterNode() {
+    }
+
+    public FilterNode(String column, FilterExpress express, Serializable value) {
+        Objects.requireNonNull(column);
+        Objects.requireNonNull(express);
+        this.column = column;
+        this.express = express;
+        this.value = value;
+    }
+
+    public FilterNode and(FilterNode node) {
+        return any(node, true);
+    }
+
+    public FilterNode and(String column, Serializable value) {
+        return and(new FilterNode(column, FilterExpress.EQUAL, value));
+    }
+
+    public FilterNode and(String column, FilterExpress express, Serializable value) {
+        return and(new FilterNode(column, express, value));
+    }
+
+    public FilterNode or(FilterNode node) {
+        return any(node, false);
+    }
+
+    public FilterNode or(String column, Serializable value) {
+        return or(new FilterNode(column, FilterExpress.EQUAL, value));
+    }
+
+    public FilterNode or(String column, FilterExpress express, Serializable value) {
+        return or(new FilterNode(column, express, value));
+    }
+
+    private FilterNode any(FilterNode node, boolean sign) {
+        Objects.requireNonNull(node);
+        if (siblings == null) {
+            siblings = new FilterNode[]{node};
+            this.signand = sign;
+            return this;
+        }
+        if (signand == sign) {
+            FilterNode[] newsiblings = new FilterNode[siblings.length + 1];
+            System.arraycopy(siblings, 0, newsiblings, 0, siblings.length);
+            newsiblings[siblings.length] = node;
+            this.siblings = newsiblings;
+            return this;
+        }
+        FilterNode newnode = new FilterNode(this.column, this.express, this.value);
+        newnode.signand = this.signand;
+        newnode.siblings = this.siblings;
+        this.siblings = new FilterNode[]{newnode};
+        this.column = node.column;
+        this.express = node.express;
+        this.value = node.value;
+        this.signand = sign;
+        return this;
+    }
+
+    public static FilterNode create(String column, Serializable value) {
+        return create(column, FilterExpress.EQUAL, value);
+    }
+
+    public static FilterNode create(String column, FilterExpress express, Serializable value) {
+        return new FilterNode(column, express, value);
+    }
+
+    private String formatValue() {
+        if (value == null) return "null";
+        if (value instanceof Number) {
+            return value.toString();
+        }
+        if (value instanceof CharSequence) {
+            return new StringBuilder().append('"').append(value.toString().replace("\"", "\\\"")).append('"').toString();
+        }
+        if (value.getClass().isArray()) {
+            int len = Array.getLength(value);
+            StringBuilder sb = new StringBuilder();
+            sb.append('(');
+            for (int i = 0; i < len; i++) {
+                Object o = Array.get(value, i);
+                if (sb.length() > 0) sb.append(',');
+                if (o instanceof CharSequence) {
+                    sb.append('"').append(o.toString().replace("\"", "\\\"")).append('"');
+                } else {
+                    sb.append('"').append(o).append('"');
+                }
+            }
+            return sb.append(')').toString();
+        }
+        if (value instanceof Collection) {
+            Collection c = (Collection) value;
+            StringBuilder sb = new StringBuilder();
+            sb.append('(');
+            for (Object o : c) {
+                if (sb.length() > 0) sb.append(',');
+                if (o instanceof CharSequence) {
+                    sb.append('"').append(o.toString().replace("\"", "\\\"")).append('"');
+                } else {
+                    sb.append('"').append(o).append('"');
+                }
+            }
+            return sb.append(')').toString();
+        }
+        return String.valueOf(value);
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        if (siblings == null) {
+            sb.append(column).append(' ').append(express.value()).append(' ').append(formatValue());
+        } else {
+            sb.append('(').append(column).append(' ').append(express.value()).append(' ').append(formatValue());
+            for (FilterNode node : this.siblings) {
+                sb.append(signand ? " AND " : " OR ").append(node.toString());
+            }
+            sb.append(')');
+        }
+        return sb.toString();
+    }
+
+    public boolean isSignand() {
+        return signand;
+    }
+
+    public void setSignand(boolean signand) {
+        this.signand = signand;
+    }
+
+    public String getColumn() {
+        return column;
+    }
+
+    public void setColumn(String column) {
+        this.column = column;
+    }
+
+    public FilterExpress getExpress() {
+        return express;
+    }
+
+    public void setExpress(FilterExpress express) {
+        this.express = express;
+    }
+
+    public Serializable getValue() {
+        return value;
+    }
+
+    public void setValue(Serializable value) {
+        this.value = value;
+    }
+
+    public FilterNode[] getSiblings() {
+        return siblings;
+    }
+
+    public void setSiblings(FilterNode[] siblings) {
+        this.siblings = siblings;
+    }
+
+}