Android Open Source - andro_auto_framework Record Session Resource

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License

The source code is released under:

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCT...

Java Source Code

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.//  w  w  w  .  j a  v  a  2 s . c o m
 */
package com.imaginea.botbot.server.service;

import com.imaginea.botbot.server.jpa.RecordSession;
import java.util.Collection;
import javax.ws.rs.Path;
import javax.ws.rs.GET;
import javax.ws.rs.PUT;
import javax.ws.rs.DELETE;
import javax.ws.rs.Produces;
import javax.ws.rs.Consumes;
import javax.ws.rs.QueryParam;
import javax.ws.rs.DefaultValue;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.WebApplicationException;
import javax.persistence.NoResultException;
import javax.persistence.EntityManager;
import java.util.List;
import com.imaginea.botbot.server.jpa.RecordEntry;
import com.imaginea.botbot.server.converter.RecordSessionConverter;
import com.sun.jersey.api.core.ResourceContext;
import java.net.URI;

/**
 *
 * @author rohit
 */
public class RecordSessionResource {
    @Context
    protected com.sun.jersey.api.core.ResourceContext resourceContext;
    @Context
    protected javax.ws.rs.core.UriInfo uriInfo;
    
    protected Long id;

    /** Creates a new instance of RecordSessionResource */
    public RecordSessionResource() {
    }

    public void setId(Long id) {
        this.id = id;
    }

    /**
     * Get method for retrieving an instance of RecordSession identified by id in XML format.
     *
     * @param id identifier for the entity
     * @return an instance of RecordSessionConverter
     */
    @GET
    @Produces({"application/xml", "application/json"})
    public RecordSessionConverter get(@QueryParam("expandLevel")
            @DefaultValue("1") int expandLevel) {
        PersistenceService persistenceSvc = PersistenceService.getInstance();
        try {
            persistenceSvc.beginTx();
            return new RecordSessionConverter(getEntity(), uriInfo.getAbsolutePath().resolve(URI.create(getEntity().getId().toString())), expandLevel);
        } finally {
            PersistenceService.getInstance().close();
        }
    }

    /**
     * Put method for updating an instance of RecordSession identified by id using XML as the input format.
     *
     * @param id identifier for the entity
     * @param data an RecordSessionConverter entity that is deserialized from a XML stream
     */
    @PUT
    @Consumes({"application/xml", "application/json"})
    public void put(RecordSessionConverter data) {
        PersistenceService persistenceSvc = PersistenceService.getInstance();
        try {
            persistenceSvc.beginTx();
            EntityManager em = persistenceSvc.getEntityManager();
            updateEntity(getEntity(), data.resolveEntity(em));
            persistenceSvc.commitTx();
        } finally {
            persistenceSvc.close();
        }
    }

    /**
     * Delete method for deleting an instance of RecordSession identified by id.
     *
     * @param id identifier for the entity
     */
    @DELETE
    public void delete() {
        PersistenceService persistenceSvc = PersistenceService.getInstance();
        try {
            persistenceSvc.beginTx();
            deleteEntity(getEntity());
            persistenceSvc.commitTx();
        } finally {
            persistenceSvc.close();
        }
    }

    /**
     * Returns an instance of RecordSession identified by id.
     *
     * @param id identifier for the entity
     * @return an instance of RecordSession
     */
    protected RecordSession getEntity() {
        EntityManager em = PersistenceService.getInstance().getEntityManager();
        try {
            return (RecordSession) em.createQuery("SELECT e FROM RecordSession e where e.id = :id").setParameter("id", id).getSingleResult();
        } catch (NoResultException ex) {
            throw new WebApplicationException(new Throwable("Resource for " + uriInfo.getAbsolutePath().resolve(URI.create("")) + " does not exist."), 404);
        }
    }

    /**
     * Updates entity using data from newEntity.
     *
     * @param entity the entity to update
     * @param newEntity the entity containing the new data
     * @return the updated entity
     */
    private RecordSession updateEntity(RecordSession entity, RecordSession newEntity) {
        EntityManager em = PersistenceService.getInstance().getEntityManager();
        List<RecordEntry> recordEntries = entity.getRecordEntries();
        List<RecordEntry> recordEntriesNew = newEntity.getRecordEntries();
        entity = em.merge(newEntity);
        if (!recordEntriesNew.isEmpty()) {
              for (RecordEntry value : recordEntries) {
                if (!recordEntriesNew.contains(value)) {
                    throw new WebApplicationException(new Throwable("Cannot remove items from records"));
                }
            }
            for (RecordEntry value : recordEntriesNew) {
                if (!recordEntries.contains(value)) {
                    RecordSession oldEntity = value.getRecordSession();
                    value.setRecordSession(entity);
                    if (oldEntity != null && !oldEntity.equals(entity)) {
                        oldEntity.getRecordEntries().remove(value);
                    }
                }
            }
        } else {
            entity.setRecordEntries(recordEntries);
        }
        
        return entity;
    }

    /**
     * Deletes the entity.
     *
     * @param entity the entity to deletle
     */
    private void deleteEntity(RecordSession entity) {
        EntityManager em = PersistenceService.getInstance().getEntityManager();
        em.remove(entity);
    }

    /**
     * Returns a dynamic instance of RecordEntriesResource used for entity navigation.
     *
     * @param id identifier for the parent entity
     * @return an instance of RecordEntriesResource
     */
    @Path("recordentries/")
    public RecordEntriesResource getRecordEntriesResource() {
        RecordEntriesResourceSub recordEntriesResourceSub = resourceContext.getResource(RecordEntriesResourceSub.class);
        recordEntriesResourceSub.setParent(getEntity());
        return recordEntriesResourceSub;
    }

    public static class RecordEntriesResourceSub extends RecordEntriesResource {

        private RecordSession parent;

        public void setParent(RecordSession parent) {
            this.parent = parent;
        }

        @Override
        protected Collection<RecordEntry> getEntities(int start, int max, String query) {
            Collection<RecordEntry> result = new java.util.ArrayList<RecordEntry>();
            int index = 0;
            for (RecordEntry e : parent.getRecordEntries()) {
                if (index >= start && (index - start) < max) {
                    result.add(e);
                }
                index++;
            }
            return result;
        }
    }
}

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