使用 @Context 注入时，FIQL SearchContext 抛出 NullPointerException

我正在尝试使用实现一个简单的休息服务FIQL但我的代码抛出NullPointerException在我注射的地方SearchContext与@Context。这是我的代码

我的服务等级：

import java.util.*;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import org.apache.cxf.jaxrs.ext.search.SearchCondition;
import org.apache.cxf.jaxrs.ext.search.SearchContext;

@Path("/search")
public class Books {

    private List<Book> theBooks = new LinkedList<Book>();

    @Path("/book")
    @GET
    @Produces(MediaType.APPLICATION_XML)
    public List<Book> getBook(@Context SearchContext searchContext) {

        theBooks.add(new Book("1", "nick1"));
        theBooks.add(new Book("2", "nick2"));
        theBooks.add(new Book("3", "nick3"));
        theBooks.add(new Book("4", "nick4"));
        theBooks.add(new Book("5", "nick5"));

        SearchCondition<Book> condition = searchContext
                .getCondition(Book.class);

        return condition.findAll(theBooks);
    }
}

我的书本课

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Book {

    private String id;
    private String author;

    public Book(){  }
    public Book(String id, String ownerinfo) {
        this.id = id;
        this.author = ownerinfo;
    }
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getOwnerinfo() {
        return author;
    }
    public void setOwnerinfo(String ownerinfo) {
        this.author = ownerinfo;
    } 
}

我正在使用maven并且我已经使用了依赖项

<dependency>
    <groupId>org.apache.cxf</groupId>
    <artifactId>cxf-rt-rs-extension-search</artifactId>
    <version>2.7.5</version>
</dependency>

根据这个CXF-4949 http://cxf.547215.n5.nabble.com/jira-Resolved-CXF-4949-FIQL-searchContext-returns-null-SearchCondition-td5726441.html我的代码（我相信）应该可以工作，但我仍然searchContext之后为空@Context

有任何想法吗？

Thanks

我设法解决了这个问题。我错过了声明SearchContextProvider in the beans.xml文件。我刚刚添加了这一行

<bean class="org.apache.cxf.jaxrs.ext.search.SearchContextProvider"/>

in the <jaxrs:providers>标签，现在工作正常。

关于 FIQL 的更多信息here http://cxf.apache.org/docs/jax-rs-search.html

Thanks