From 8a8d45e642c71af6967d539e9b5f85815eb9470a Mon Sep 17 00:00:00 2001
From: Redkale <8730487+redkale@users.noreply.github.com>
Date: Mon, 11 Nov 2019 11:10:32 +0800
Subject: [PATCH] =?UTF-8?q?DataSource=E5=A2=9E=E5=8A=A0=E5=88=A4=E6=96=AD?=
 =?UTF-8?q?=E5=AD=97=E7=AC=A6=E4=B8=B2=E5=AD=97=E6=AE=B5=E5=80=BC=E9=95=BF?=
 =?UTF-8?q?=E5=BA=A6=E7=9A=84FilterExpress?=
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---
 src/org/redkale/source/FilterExpress.java  |  5 ++
 src/org/redkale/source/FilterNode.java     | 80 +++++++++++++++++++++-
 src/org/redkale/source/FilterNodeBean.java |  3 +
 3 files changed, 87 insertions(+), 1 deletion(-)

diff --git a/src/org/redkale/source/FilterExpress.java b/src/org/redkale/source/FilterExpress.java
index 92df8f5bc..290ade443 100644
--- a/src/org/redkale/source/FilterExpress.java
+++ b/src/org/redkale/source/FilterExpress.java
@@ -31,6 +31,11 @@ public enum FilterExpress {
     NOTLIKE("NOT LIKE"),
     IGNORECASELIKE("LIKE"), //不区分大小写的 LIKE
     IGNORECASENOTLIKE("NOT LIKE"), //不区分大小写的 NOT LIKE
+    LENGTH_EQUAL("="), //字符串值的长度
+    LENGTH_LESSTHAN("<"), //字符串值的长度 <
+    LENGTH_LESSTHANOREQUALTO("<="), //字符串值的长度 <=
+    LENGTH_GREATERTHAN(">"), //字符串值的长度 >
+    LENGTH_GREATERTHANOREQUALTO(">="), //字符串值的长度 >=
 
     CONTAIN("CONTAIN"), //包含， 相当于反向LIKE 
     NOTCONTAIN("NOT CONTAIN"), //不包含， 相当于反向LIKE 
diff --git a/src/org/redkale/source/FilterNode.java b/src/org/redkale/source/FilterNode.java
index a988f118a..15a319233 100644
--- a/src/org/redkale/source/FilterNode.java
+++ b/src/org/redkale/source/FilterNode.java
@@ -397,7 +397,10 @@ public class FilterNode {  //FilterNode 不能实现Serializable接口， 否则
         if (express == NOTCONTAIN) return info.notcontainSQL.replace("${column}", info.getSQLColumn(talis, column)).replace("${keystr}", val);
         if (express == IGNORECASENOTCONTAIN) return info.notcontainSQL.replace("${column}", "LOWER(" + info.getSQLColumn(talis, column) + ")").replace("${keystr}", val);
 
-        if (express == IGNORECASEEQUAL || express == IGNORECASENOTEQUAL || express == IGNORECASELIKE || express == IGNORECASENOTLIKE) {
+        if (express == LENGTH_EQUAL || express == LENGTH_LESSTHAN || express == LENGTH_LESSTHANOREQUALTO
+            || express == LENGTH_GREATERTHAN || express == LENGTH_GREATERTHANOREQUALTO) {
+            sb.append("LENGTH(").append(info.getSQLColumn(talis, column)).append(')');
+        } else if (express == IGNORECASEEQUAL || express == IGNORECASENOTEQUAL || express == IGNORECASELIKE || express == IGNORECASENOTLIKE) {
             sb.append("LOWER(").append(info.getSQLColumn(talis, column)).append(')');
             if (fk) val = "LOWER(" + info.getSQLColumn(talis, ((FilterKey) val0).getColumn()) + ')';
         } else {
@@ -1406,6 +1409,81 @@ public class FilterNode {  //FilterNode 不能实现Serializable接口， 否则
                         return "LOWER(" + field + ") " + express.value() + ' ' + formatToString(valstr2);
                     }
                 };
+            case LENGTH_EQUAL:
+                final int intval = ((Number) val).intValue();
+                return new Predicate<T>() {
+
+                    @Override
+                    public boolean test(T t) {
+                        Object rs = attr.get(t);
+                        return (rs == null && 0 == intval) || (rs != null && rs.toString().length() == intval);
+                    }
+
+                    @Override
+                    public String toString() {
+                        return "LENGTH(" + field + ") " + express.value() + ' ' + intval;
+                    }
+                };
+            case LENGTH_LESSTHAN:
+                final int intval2 = ((Number) val).intValue();
+                return new Predicate<T>() {
+
+                    @Override
+                    public boolean test(T t) {
+                        Object rs = attr.get(t);
+                        return (rs == null && 0 < intval2) || (rs != null && rs.toString().length() < intval2);
+                    }
+
+                    @Override
+                    public String toString() {
+                        return "LENGTH(" + field + ") " + express.value() + ' ' + intval2;
+                    }
+                };
+            case LENGTH_LESSTHANOREQUALTO:
+                final int intval3 = ((Number) val).intValue();
+                return new Predicate<T>() {
+
+                    @Override
+                    public boolean test(T t) {
+                        Object rs = attr.get(t);
+                        return (rs == null && 0 <= intval3) || (rs != null && rs.toString().length() <= intval3);
+                    }
+
+                    @Override
+                    public String toString() {
+                        return "LENGTH(" + field + ") " + express.value() + ' ' + intval3;
+                    }
+                };
+            case LENGTH_GREATERTHAN:
+                final int intval4 = ((Number) val).intValue();
+                return new Predicate<T>() {
+
+                    @Override
+                    public boolean test(T t) {
+                        Object rs = attr.get(t);
+                        return (rs == null && 0 > intval4) || (rs != null && rs.toString().length() > intval4);
+                    }
+
+                    @Override
+                    public String toString() {
+                        return "LENGTH(" + field + ") " + express.value() + ' ' + intval4;
+                    }
+                };
+            case LENGTH_GREATERTHANOREQUALTO:
+                final int intval5 = ((Number) val).intValue();
+                return new Predicate<T>() {
+
+                    @Override
+                    public boolean test(T t) {
+                        Object rs = attr.get(t);
+                        return (rs == null && 0 >= intval5) || (rs != null && rs.toString().length() >= intval5);
+                    }
+
+                    @Override
+                    public String toString() {
+                        return "LENGTH(" + field + ") " + express.value() + ' ' + intval5;
+                    }
+                };
             case CONTAIN:
                 return fk ? new Predicate<T>() {
 
diff --git a/src/org/redkale/source/FilterNodeBean.java b/src/org/redkale/source/FilterNodeBean.java
index 068410e4e..3a9bbfbae 100644
--- a/src/org/redkale/source/FilterNodeBean.java
+++ b/src/org/redkale/source/FilterNodeBean.java
@@ -363,6 +363,9 @@ public final class FilterNodeBean<T extends FilterBean> implements Comparable<Fi
                 sb.append(col).append(' ').append(express.value());
             } else if (express == ISEMPTY || express == ISNOTEMPTY) {
                 sb.append(col).append(' ').append(express.value()).append(" ''");
+            } else if (express == LENGTH_EQUAL || express == LENGTH_LESSTHAN || express == LENGTH_LESSTHANOREQUALTO
+                || express == LENGTH_GREATERTHAN || express == LENGTH_GREATERTHANOREQUALTO) {
+                sb.append("LENGTH(").append(col).append(") ").append(express.value()).append(" ?");
             } else {
                 boolean lower = (express == IGNORECASEEQUAL || express == IGNORECASENOTEQUAL || express == IGNORECASELIKE
                     || express == IGNORECASENOTLIKE || express == IGNORECASECONTAIN || express == IGNORECASENOTCONTAIN);