[Java] Mybatis 中如何判断集合的size

<if test="null != staffCodeList and staffCodeList.size > 0">
and gui.USER_CODE not in
<foreach collection="staffCodeList" item="staffCode" open="(" separator="," close=")">
#{staffCode}
</foreach>
</if>

### Error querying database. Cause: org.apache.ibatis.builder.BuilderException: Error evaluating expression 'list != null and list.size() > 0'. Cause: org.apache.ibatis.ognl.MethodFailedException: Method "size" failed for object [1] [java.lang.IllegalAccessException: Class org.apache.ibatis.ognl.OgnlRuntime can not access a member of class java.util.Collections$SingletonList with modifiers "public"]
### Cause: org.apache.ibatis.builder.BuilderException: Error evaluating expression 'list != null and list.size() > 0'. Cause: org.apache.ibatis.ognl.MethodFailedException: Method "size" failed for object [1] [java.lang.IllegalAccessException: Class org.apache.ibatis.ognl.OgnlRuntime can not access a member of class java.util.Collections$SingletonList with modifiers "public"]
 at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:23) org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:107)
 at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:98)
 at cn.com.shaobingmm.MybatisBugTest$2.run(MybatisBugTest.java:88)
 at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.ibatis.builder.BuilderException: Error evaluating expression 'list != null and list.size() > 0'. Cause: org.apache.ibatis.ognl.MethodFailedException: Method "size" failed for object [1] [java.lang.IllegalAccessException: Class org.apache.ibatis.ognl.OgnlRuntime can not access a member of class java.util.Collections$SingletonList with modifiers "public"]
 at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java
 at:47)
 at org.apache.ibatis.scripting.xmltags.ExpressionEvaluator.evaluateBoolean(ExpressionEvaluator.java:29)
 at org.apache.ibatis.scripting.xmltags.IfSqlNode.apply(IfSqlNode.java:30)
 at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:29)
 at org.apache.ibatis.scripting.xmltags.TrimSqlNode.apply(TrimSqlNode.java:51)
 at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:29)
 at org.apache.ibatis.scripting.xmltags.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:37)
 at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:275)
 at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:79)
 at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:104)
 ... 3 more
Caused by: org.apache.ibatis.ognl.MethodFailedException: Method "size" failed for object [1] [java.lang.IllegalAccessException: Class org.apache.ibatis.ognl.OgnlRuntime can not access a member of class java.util.Collections$SingletonList with modifiers "public"]
 at org.apache.ibatis.ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:837)
 at org.apache.ibatis.ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:61)
 at org.apache.ibatis.ognl.OgnlRuntime.callMethod(OgnlRuntime.java:860)
 at org.apache.ibatis.ognl.ASTMethod.getValueBody(ASTMethod.java:73)
 at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
 at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:210)
 at org.apache.ibatis.ognl.ASTChain.getValueBody(ASTChain.java:109)
 at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
 at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:210)
 at org.apache.ibatis.ognl.ASTGreater.getValueBody(ASTGreater.java:49)
 at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
 at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:210)
 at org.apache.ibatis.ognl.ASTAnd.getValueBody(ASTAnd.java:56)
 at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
 at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:210)
 at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:333)
 at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:413)
 at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:395)
 at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:45)
 ... 12 more

<mapper namespace="CompanyMapper">
 <select id="getCompanysByIds"resultType="cn.com.shaobingmm.Company">
  select *
  from company
  <where>
   <if test="list != null and list.size() > 0">
  and id in
  <foreach collection="list" item="id" open="(" separator="," close=")">#{id}
</foreach>
   </if>
  </where>
 </select>
</mapper>

public static Object callAppropriateMethod(OgnlContext context, Object source, Object target, String methodName, String propertyName, List methods, Object[] args) throws MethodFailedException {
  Object reason = null;
  Object[] actualArgs = objectArrayPool.create(args.length);
 
  try {
   Method e = getAppropriateMethod(context, source, target, methodName, propertyName, methods, args, actualArgs);
   if(e == null || !isMethodAccessible(context, source, e, propertyName)) {
  StringBuffer buffer = new StringBuffer();
  if(args != null) {
   int i = 0;
 
   for(int ilast = args.length - 1; i <= ilast; ++i) {
    Object arg = args[i];
    buffer.append(arg == null?NULL_STRING:arg.getClass().getName());
    if(i < ilast) {
     buffer.append(", ");
    }
   }
  }
 
  throw new NoSuchMethodException(methodName + "(" + buffer + ")");
   }
 
   Object var14 = invokeMethod(target, e, actualArgs);
   return var14;
  } catch (NoSuchMethodException var21) {
   reason = var21;
  } catch (IllegalAccessException var22) {
   reason = var22;
  } catch (InvocationTargetException var23) {
   reason = var23.getTargetException();
  } finally {
   objectArrayPool.recycle(actualArgs);
  }
 
  throw new MethodFailedException(source, methodName, (Throwable)reason);
 }

public static Object invokeMethod(Object target, Method method, Object[] argsArray) throws InvocationTargetException, IllegalAccessException {
  boolean wasAccessible = true;
  if(securityManager != null) {
   try {
  securityManager.checkPermission(getPermission(method));
   } catch (SecurityException var6) {
  throw new IllegalAccessException("Method [" + method + "] cannot be accessed.");
   }
  }
 
  if((!Modifier.isPublic(method.getModifiers()) || !Modifier.isPublic(method.getDeclaringClass().getModifiers())) && !(wasAccessible = method.isAccessible())) {
   method.setAccessible(true); （1）
  }
 
  Object result = method.invoke(target, argsArray); (3)
  if(!wasAccessible) {
   method.setAccessible(false); (2)
  }
 
  return result;
 }

public int java.util.Collections$SingletonList.size()

public static Object invokeMethod(Object target, Method method, Object[] argsArray) throws InvocationTargetException, IllegalAccessException {
  boolean syncInvoke = false;
  boolean checkPermission = false;
  int mHash = method.hashCode();
  synchronized(method) {
   if(_methodAccessCache.get(Integer.valueOf(mHash)) == null || _methodAccessCache.get(Integer.valueOf(mHash)) == Boolean.TRUE) {
  syncInvoke = true;
   }
 
   if(_securityManager != null && _methodPermCache.get(Integer.valueOf(mHash)) == null || _methodPermCache.get(Integer.valueOf(mHash)) == Boolean.FALSE) {
  checkPermission = true;
   }
  }
 
  boolean wasAccessible = true;
  Object result;
  if(syncInvoke) {
   synchronized(method) {
  if(checkPermission) {
   try {
    _securityManager.checkPermission(getPermission(method));
    _methodPermCache.put(Integer.valueOf(mHash), Boolean.TRUE);
   } catch (SecurityException var12) {
    _methodPermCache.put(Integer.valueOf(mHash), Boolean.FALSE);
    throw new IllegalAccessException("Method [" + method + "] cannot be accessed.");
   }
  }
 
  if(Modifier.isPublic(method.getModifiers()) && Modifier.isPublic(method.getDeclaringClass().getModifiers())) {
   _methodAccessCache.put(Integer.valueOf(mHash), Boolean.FALSE);
  } else if(!(wasAccessible = method.isAccessible())) {
   method.setAccessible(true);
   _methodAccessCache.put(Integer.valueOf(mHash), Boolean.TRUE);
  } else {
   _methodAccessCache.put(Integer.valueOf(mHash), Boolean.FALSE);
  }
 
  result = method.invoke(target, argsArray);
  if(!wasAccessible) {
   method.setAccessible(false);
  }
   }
  } else {
   if(checkPermission) {
  try {
   _securityManager.checkPermission(getPermission(method));
   _methodPermCache.put(Integer.valueOf(mHash), Boolean.TRUE);
  } catch (SecurityException var11) {
   _methodPermCache.put(Integer.valueOf(mHash), Boolean.FALSE);
   throw new IllegalAccessException("Method [" + method + "] cannot be accessed.");
  }
   }
 
   result = method.invoke(target, argsArray);
  }
 
  return result;
 }