Examples of com.avaje.ebean.bean.PersistenceContext

com.avaje.ebean.bean.PersistenceContext
Holds entity beans by there type and id.
This is used to ensure only one instance for a given entity type and id is used to build object graphs from queries and lazy loading.


    SpiTransaction t = (SpiTransaction) transaction;
    if (t == null) {
      t = getCurrentServerTransaction();
    }
    PersistenceContext context = null;
    if (t != null) {
      // first look in the persistence context
      context = t.getPersistenceContext();
      if (context != null) {
        WithOption o = context.getWithOption(beanDescriptor.getBeanType(), query.getId());
        if (o != null) {
          if (o.isDeleted()) {
            // Bean was previously deleted in the same transaction / persistence context
            return null;
          }

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    SpiQuery<T> spiQuery = (SpiQuery<T>) query;


    // we want to use a single PersistenceContext to be used
    // for all the paging queries so we make sure there is a
    // PersistenceContext on the query
    PersistenceContext pc = spiQuery.getPersistenceContext();
    if (pc == null) {
      SpiTransaction currentTransaction = getCurrentServerTransaction();
      if (currentTransaction != null) {
        pc = currentTransaction.getPersistenceContext();
      }

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      localIdBinder = idBinder;
    }


    Mode queryMode = ctx.getQueryMode();


    PersistenceContext persistenceContext = !readId ? null : ctx.getPersistenceContext();


    Object id = null;
    if (!readId) {
      // report type bean... or perhaps excluding the id for SqlSelect?


    } else {
      id = localIdBinder.readSet(ctx, localBean);
      if (id == null) {
        // bean must be null...
        localBean = null;
      } else {
        // check the PersistenceContext to see if the bean already exists
        contextBean = (EntityBean)persistenceContext.putIfAbsent(id, localBean);
        if (contextBean == null) {
          // bean just added to the persistenceContext
          contextBean = localBean;
        } else {
          // bean already exists in persistenceContext

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   * Get the TransactionContext either explicitly set on the query or
   * transaction scoped.
   */
  private PersistenceContext getPersistenceContext(SpiQuery<?> query, SpiTransaction t) {


    PersistenceContext ctx = query.getPersistenceContext();
    if (ctx == null) {
      ctx = t.getPersistenceContext();
    }
    return ctx;
  }

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