java - Joining to a collection in a JPA-QL query -

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i'am using jpa mapping ,i have entity class

@entity @table(name = "h_pe") @xmlrootelement @namedqueries({  public class hpe implements serializable {  private static final long serialversionuid = 1l;  @embeddedid  protected hpepk hpepk;  @column(name = "pe_timeout")  private integer petimeout;  @column(name = "pe_status")  private boolean pestatus;  @onetomany(cascade = cascadetype.all, mappedby = "hpe")  private collection<hpesp> hpespcollection;  @joincolumn(name = "pe_env", referencedcolumnname = "env_url", insertable = false, updatable = false)  @manytoone(optional = false)  private henv henv;  @joincolumn(name = "pe_platform", referencedcolumnname = "platform_name", insertable = false, updatable = false)  @manytoone(optional = false)  private hplatform hplatform;  }

i want write request jpa following(i have wrote sql ),i have tried write haven't understood how use pe_env because result of onetomany relationship!

select distinct h_env.env_name,h_platform.platform_name h_env,h_platform,h_pe h_env.env_url=h_pe.pe_env , h_platform.platform_name=h_pe.pe_platform , h_platform.platform_name='xxx'; 

select e.name, p.name hpe hp join hp.hplatform p join hp.hpespcollection p p.name = 'xxx'

see, http://en.wikibooks.org/wiki/java_persistence/querying#common_queries


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