mybatis插件的sql参数问题

[米斯特_]

最近在学习mybatis，想自己实现一个mybatis插件，但是遇到一些问题：
需求是这样的：我想把所有sql都动态添加一些查询条件，现在sql已经能够拼接出新的sql而且新增的查询条件的值也用‘?’进行填充（不想直接把值拼接到sql里面，想用预编译方式进行处理），但是参数却一直没能处理成功，想请教下哪个地方出问题了：

大致的代码如下：

@Intercepts(@Signature(type = Executor.class, method = "query", args = { MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class }))
public class QueryConditionHelper implements Interceptor {
        @Override
	public Object intercept(Invocation invocation)  {
		Object[] args = invocation.getArgs();
		MappedStatement ms = (MappedStatement) args[0];
		Object parameter = args[1];
		//RowBounds rowBounds = (RowBounds) args[2];
		BoundSql boundSql = ms.getBoundSql(parameter);
		String sql = boundSql.getSql();
		sql+=" AND TABLE.AAA=?";

		List<ParameterMapping> parameterMappingList = new ArrayList<>(boundSql.getParameterMappings());
		parameterMappingList.add(new ParameterMapping.Builder(ms.getConfiguration(), "AAA", Object.class).build());

		BoundSql newBoundSql = new BoundSql(ms.getConfiguration(), sql, parameterMappingList, boundSql.getParameterObject());

		// 把新的查询放到statement里
		SqlSource sqlSource = new StaticSqlSource(ms.getConfiguration(), sql, parameterMappingList);
		MappedStatement newMs = copyFromMappedStatement(ms, sqlSource);
		
		for (ParameterMapping mapping : newBoundSql.getParameterMappings()) {
			String prop = mapping.getProperty();
			if (boundSql.hasAdditionalParameter(prop)) {
				newBoundSql.setAdditionalParameter(prop, boundSql.getAdditionalParameter(prop));
			}
		}
		args[0] = newMs;
		return invocation.proceed();
	}

private MappedStatement copyFromMappedStatement(MappedStatement ms, SqlSource newSqlSource) {
		MappedStatement.Builder builder = new MappedStatement.Builder(ms.getConfiguration(), ms.getId(), newSqlSource, ms.getSqlCommandType());
		builder.resource(ms.getResource());
		builder.fetchSize(ms.getFetchSize());
		builder.statementType(ms.getStatementType());
		builder.keyGenerator(ms.getKeyGenerator());
		if (ms.getKeyProperties() != null && ms.getKeyProperties().length > 0) {
			builder.keyProperty(ms.getKeyProperties()[0]);
		}
		builder.timeout(ms.getTimeout());
		builder.parameterMap(ms.getParameterMap());
		builder.resultMaps(ms.getResultMaps());
		builder.resultSetType(ms.getResultSetType());
		builder.cache(ms.getCache());
		builder.flushCacheRequired(ms.isFlushCacheRequired());
		builder.useCache(ms.isUseCache());
		return builder.build();
	}

｝

结果却一直报错： nested exception is org.apache.ibatis.binding.BindingException: Parameter 'AAA' not found. Available parameters are [pdithuId, param1]
“pdithuId”是查询方法本来的业务参数，但是param1是什么回事？我应该怎么写才能达到我的需求？有懂的兄弟能够解答一下吗？

[MavenTalk]

太抽象了，给个上下文吧