WebLogic 12.2.1.4 JSF1.2 ELContext在文字表达式上引发空指针

<application>
    <el-resolver>com.example.CustomELResolver</el-resolver>
</application>

import javax.el.ELContext;
import javax.el.ELResolver;
import javax.faces.context.FacesContext;

public class CustomELResolver extends ELResolver {
    @Override
    public Object getValue(ELContext context, Object base, Object property) {
        // 自定义逻辑
        return null;
    }

    @Override
    public Class<?> getType(ELContext context, Object base, Object property) {
        return null;
    }

    @Override
    public void setValue(ELContext context, Object base, Object property, Object value) {
    }

    @Override
    public boolean isReadOnly(ELContext context, Object base, Object property) {
        return false;
    }

    @Override
    public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context, Object base) {
        return null;
    }

    @Override
    public Class<?> getCommonPropertyType(ELContext context, Object base) {
        return null;
    }
}

import javax.faces.bean.ManagedBean;
import javax.inject.Inject;

@ManagedBean
public class MyBean {
    @Inject
    private MyDependency myDependency;

    // getter 和 setter
}

<!-- web.xml -->
<servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>*.xhtml</url-pattern>
</servlet-mapping>

<!-- faces-config.xml -->
<faces-config xmlns="http://xmlns.jcp.org/xml/ns/javaee"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd"
              version="2.2">
    <application>
        <el-resolver>com.example.CustomELResolver</el-resolver>
    </application>
</faces-config>