I have some values in my object are returning by value null when converting from json to object and some others doesn't,i can't figure out why is that happening
here's my code to convert
OriginalMovie originalMovie = gson.fromJson(jsonString, OriginalMovie.class);
here's my json
{"page":1,
"results":[{"adult":false,
"backdrop_path":"/o4I5sHdjzs29hBWzHtS2MKD3JsM.jpg",
"genre_ids":[878,28,53,12],
"id":87101,"original_language":"en",
"original_title":"Terminator Genisys",
"overview":"The year is 2029. John Connor, leader of the resistance continues the war against the machines.",
"release_date":"2015-07-01",
"poster_path":"/5JU9ytZJyR3zmClGmVm9q4Geqbd.jpg",
"popularity":54.970301,
"title":"Terminator Genisys","video":false,
"vote_average":6.4,
"vote_count":197}],
"total_pages":11666,"total_results":233312}
and here's my base class (contains results)
package MovieReviewHelper;
import java.util.ArrayList;
import java.util.List;
public class OriginalMovie
{
private long page;
private List<Result> results = new ArrayList<Result>();
private long totalPages;
private long totalResults;
public long getPage()
{
return page;
}
public void setPage(long page)
{
this.page = page;
}
public List<Result> getResults()
{
return results;
}
public void setResults(List<Result> results)
{
this.results = results;
}
public long getTotalPages() {
return totalPages;
}
public void setTotalPages(long totalPages)
{
this.totalPages = totalPages;
}
public long getTotalResults()
{
return totalResults;
}
public void setTotalResults(long totalResults)
{
this.totalResults = totalResults;
}
}
and here's my other class
package MovieReviewHelper;
import java.util.ArrayList;
import java.util.List;
public class Result {
private boolean adult;
private String backdropPath;
private List<Long> genreIds = new ArrayList<Long>();
private long id;
private String originalLanguage;
private String originalTitle;
private String overview;
private String releaseDate;
private String posterPath;
private double popularity;
private String title;
private boolean video;
private double voteAverage;
private long voteCount;
public boolean isAdult()
{
return adult;
}
public void setAdult(boolean adult)
{
this.adult = adult;
}
public String getBackdropPath()
{
return backdropPath;
}
public void setBackdropPath(String backdropPath)
{
this.backdropPath = backdropPath;
}
public List<Long> getGenreIds()
{
return genreIds;
}
public void setGenreIds(List<Long> genreIds)
{
this.genreIds = genreIds;
}
public long getId()
{
return id;
}
public void setId(long id)
{
this.id = id;
}
public String getOriginalLanguage()
{
return originalLanguage;
}
public void setOriginalLanguage(String originalLanguage)
{
this.originalLanguage = originalLanguage;
}
public String getOriginalTitle()
{
return originalTitle;
}
public void setOriginalTitle(String originalTitle)
{
this.originalTitle = originalTitle;
}
public String getOverview()
{
return overview;
}
public void setOverview(String overview)
{
this.overview = overview;
}
public String getReleaseDate()
{
return releaseDate;
}
public void setReleaseDate(String releaseDate)
{
this.releaseDate = releaseDate;
}
public String getPosterPath()
{
return posterPath;
}
public void setPosterPath(String posterPath)
{
this.posterPath = posterPath;
}
public double getPopularity()
{
return popularity;
}
public void setPopularity(double popularity)
{
this.popularity = popularity;
}
public String getTitle()
{
return title;
}
public void setTitle(String title)
{
this.title = title;
}
public boolean isVideo()
{
return video;
}
public void setVideo(boolean video)
{
this.video = video;
}
public double getVoteAverage()
{
return voteAverage;
}
public void setVoteAverage(double voteAverage)
{
this.voteAverage = voteAverage;
}
public long getVoteCount()
{
return voteCount;
}
public void setVoteCount(long voteCount)
{
this.voteCount = voteCount;
}
}
Your Json and Class variables should have the same name.
backdrop_path in Json and backdropPath in class would not work
Incase this helps for someone like me who spent half a day in trying to figure out a similar issue with gson.fromJson() returning object with null values, but when using #JsonProperty with an underscore in name and using Lombok in the model class.
My model class had a property like below and am using Lombok #Data for class
#JsonProperty(value="dsv_id")
private String dsvId;
So in my Json file I was using
"dsv_id"="123456"
Which was causing null value. The way I resolved it was changing the Json to have below ie.without the underscore. That fixed the problem for me.
"dsvId = "123456"
Related
How can I use GSON to parse the following JSON object:
{
"ProductsByCategory": [
{.....},
{.....},
{.....},
{.....},
]
}
The JSON object contains an array of elements. I am using GSON to try and parse the JSON and have the following POJO classes to assist me with this.
public class ProductItems {
#SerializedName("ProductsByCategory")
#Expose
private List<ProductsByCategory> productsByCategory = null;
public List<ProductsByCategory> getProductsByCategory() {
return productsByCategory;
}
public void setProductsByCategory(List<ProductsByCategory> productsByCategory) {
this.productsByCategory = productsByCategory;
}
}
public class ProductsByCategory {
#SerializedName("id")
#Expose
private Integer id;
#SerializedName("name")
#Expose
private String name;
#SerializedName("slug")
#Expose
private String slug;
#SerializedName("permalink")
#Expose
private String permalink;
#SerializedName("date_created")
#Expose
private String dateCreated;
#SerializedName("date_created_gmt")
#Expose
private String dateCreatedGmt;
#SerializedName("date_modified")
#Expose
private String dateModified;
#SerializedName("date_modified_gmt")
#Expose
private String dateModifiedGmt;
#SerializedName("type")
#Expose
private String type;
#SerializedName("status")
#Expose
private String status;
#SerializedName("featured")
#Expose
private Boolean featured;
#SerializedName("catalog_visibility")
#Expose
private String catalogVisibility;
#SerializedName("description")
#Expose
private String description;
#SerializedName("short_description")
#Expose
private String shortDescription;
#SerializedName("sku")
#Expose
private String sku;
#SerializedName("price")
#Expose
private String price;
#SerializedName("regular_price")
#Expose
private String regularPrice;
#SerializedName("sale_price")
#Expose
private String salePrice;
#SerializedName("date_on_sale_from")
#Expose
private Object dateOnSaleFrom;
#SerializedName("date_on_sale_from_gmt")
#Expose
private Object dateOnSaleFromGmt;
#SerializedName("date_on_sale_to")
#Expose
private Object dateOnSaleTo;
#SerializedName("date_on_sale_to_gmt")
#Expose
private Object dateOnSaleToGmt;
#SerializedName("price_html")
#Expose
private String priceHtml;
#SerializedName("on_sale")
#Expose
private Boolean onSale;
#SerializedName("purchasable")
#Expose
private Boolean purchasable;
#SerializedName("total_sales")
#Expose
private Integer totalSales;
#SerializedName("virtual")
#Expose
private Boolean virtual;
#SerializedName("downloadable")
#Expose
private Boolean downloadable;
#SerializedName("downloads")
#Expose
private List<Object> downloads = null;
#SerializedName("download_limit")
#Expose
private Integer downloadLimit;
#SerializedName("download_expiry")
#Expose
private Integer downloadExpiry;
#SerializedName("external_url")
#Expose
private String externalUrl;
#SerializedName("button_text")
#Expose
private String buttonText;
#SerializedName("tax_status")
#Expose
private String taxStatus;
#SerializedName("tax_class")
#Expose
private String taxClass;
#SerializedName("manage_stock")
#Expose
private Boolean manageStock;
#SerializedName("stock_quantity")
#Expose
private Integer stockQuantity;
#SerializedName("in_stock")
#Expose
private Boolean inStock;
#SerializedName("backorders")
#Expose
private String backorders;
#SerializedName("backorders_allowed")
#Expose
private Boolean backordersAllowed;
#SerializedName("backordered")
#Expose
private Boolean backordered;
#SerializedName("sold_individually")
#Expose
private Boolean soldIndividually;
#SerializedName("weight")
#Expose
private String weight;
#SerializedName("dimensions")
#Expose
private Dimensions dimensions;
#SerializedName("shipping_required")
#Expose
private Boolean shippingRequired;
#SerializedName("shipping_taxable")
#Expose
private Boolean shippingTaxable;
#SerializedName("shipping_class")
#Expose
private String shippingClass;
#SerializedName("shipping_class_id")
#Expose
private Integer shippingClassId;
#SerializedName("reviews_allowed")
#Expose
private Boolean reviewsAllowed;
#SerializedName("average_rating")
#Expose
private String averageRating;
#SerializedName("rating_count")
#Expose
private Integer ratingCount;
#SerializedName("related_ids")
#Expose
private List<Integer> relatedIds = null;
#SerializedName("upsell_ids")
#Expose
private List<Object> upsellIds = null;
#SerializedName("cross_sell_ids")
#Expose
private List<Object> crossSellIds = null;
#SerializedName("parent_id")
#Expose
private Integer parentId;
#SerializedName("purchase_note")
#Expose
private String purchaseNote;
#SerializedName("categories")
#Expose
private List<Category> categories = null;
#SerializedName("tags")
#Expose
private List<Object> tags = null;
#SerializedName("images")
#Expose
private List<Image> images = null;
#SerializedName("attributes")
#Expose
private List<Attribute> attributes = null;
#SerializedName("default_attributes")
#Expose
private List<Object> defaultAttributes = null;
#SerializedName("variations")
#Expose
private List<Integer> variations = null;
#SerializedName("grouped_products")
#Expose
private List<Object> groupedProducts = null;
#SerializedName("menu_order")
#Expose
private Integer menuOrder;
#SerializedName("meta_data")
#Expose
private List<MetaDatum> metaData = null;
#SerializedName("_links")
#Expose
private Links links;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSlug() {
return slug;
}
public void setSlug(String slug) {
this.slug = slug;
}
public String getPermalink() {
return permalink;
}
public void setPermalink(String permalink) {
this.permalink = permalink;
}
public String getDateCreated() {
return dateCreated;
}
public void setDateCreated(String dateCreated) {
this.dateCreated = dateCreated;
}
public String getDateCreatedGmt() {
return dateCreatedGmt;
}
public void setDateCreatedGmt(String dateCreatedGmt) {
this.dateCreatedGmt = dateCreatedGmt;
}
public String getDateModified() {
return dateModified;
}
public void setDateModified(String dateModified) {
this.dateModified = dateModified;
}
public String getDateModifiedGmt() {
return dateModifiedGmt;
}
public void setDateModifiedGmt(String dateModifiedGmt) {
this.dateModifiedGmt = dateModifiedGmt;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public Boolean getFeatured() {
return featured;
}
public void setFeatured(Boolean featured) {
this.featured = featured;
}
public String getCatalogVisibility() {
return catalogVisibility;
}
public void setCatalogVisibility(String catalogVisibility) {
this.catalogVisibility = catalogVisibility;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getShortDescription() {
return shortDescription;
}
public void setShortDescription(String shortDescription) {
this.shortDescription = shortDescription;
}
public String getSku() {
return sku;
}
public void setSku(String sku) {
this.sku = sku;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
public String getRegularPrice() {
return regularPrice;
}
public void setRegularPrice(String regularPrice) {
this.regularPrice = regularPrice;
}
public String getSalePrice() {
return salePrice;
}
public void setSalePrice(String salePrice) {
this.salePrice = salePrice;
}
public Object getDateOnSaleFrom() {
return dateOnSaleFrom;
}
public void setDateOnSaleFrom(Object dateOnSaleFrom) {
this.dateOnSaleFrom = dateOnSaleFrom;
}
public Object getDateOnSaleFromGmt() {
return dateOnSaleFromGmt;
}
public void setDateOnSaleFromGmt(Object dateOnSaleFromGmt) {
this.dateOnSaleFromGmt = dateOnSaleFromGmt;
}
public Object getDateOnSaleTo() {
return dateOnSaleTo;
}
public void setDateOnSaleTo(Object dateOnSaleTo) {
this.dateOnSaleTo = dateOnSaleTo;
}
public Object getDateOnSaleToGmt() {
return dateOnSaleToGmt;
}
public void setDateOnSaleToGmt(Object dateOnSaleToGmt) {
this.dateOnSaleToGmt = dateOnSaleToGmt;
}
public String getPriceHtml() {
return priceHtml;
}
public void setPriceHtml(String priceHtml) {
this.priceHtml = priceHtml;
}
public Boolean getOnSale() {
return onSale;
}
public void setOnSale(Boolean onSale) {
this.onSale = onSale;
}
public Boolean getPurchasable() {
return purchasable;
}
public void setPurchasable(Boolean purchasable) {
this.purchasable = purchasable;
}
public Integer getTotalSales() {
return totalSales;
}
public void setTotalSales(Integer totalSales) {
this.totalSales = totalSales;
}
public Boolean getVirtual() {
return virtual;
}
public void setVirtual(Boolean virtual) {
this.virtual = virtual;
}
public Boolean getDownloadable() {
return downloadable;
}
public void setDownloadable(Boolean downloadable) {
this.downloadable = downloadable;
}
public List<Object> getDownloads() {
return downloads;
}
public void setDownloads(List<Object> downloads) {
this.downloads = downloads;
}
public Integer getDownloadLimit() {
return downloadLimit;
}
public void setDownloadLimit(Integer downloadLimit) {
this.downloadLimit = downloadLimit;
}
public Integer getDownloadExpiry() {
return downloadExpiry;
}
public void setDownloadExpiry(Integer downloadExpiry) {
this.downloadExpiry = downloadExpiry;
}
public String getExternalUrl() {
return externalUrl;
}
public void setExternalUrl(String externalUrl) {
this.externalUrl = externalUrl;
}
public String getButtonText() {
return buttonText;
}
public void setButtonText(String buttonText) {
this.buttonText = buttonText;
}
public String getTaxStatus() {
return taxStatus;
}
public void setTaxStatus(String taxStatus) {
this.taxStatus = taxStatus;
}
public String getTaxClass() {
return taxClass;
}
public void setTaxClass(String taxClass) {
this.taxClass = taxClass;
}
public Boolean getManageStock() {
return manageStock;
}
public void setManageStock(Boolean manageStock) {
this.manageStock = manageStock;
}
public Integer getStockQuantity() {
return stockQuantity;
}
public void setStockQuantity(Integer stockQuantity) {
this.stockQuantity = stockQuantity;
}
public Boolean getInStock() {
return inStock;
}
public void setInStock(Boolean inStock) {
this.inStock = inStock;
}
public String getBackorders() {
return backorders;
}
public void setBackorders(String backorders) {
this.backorders = backorders;
}
public Boolean getBackordersAllowed() {
return backordersAllowed;
}
public void setBackordersAllowed(Boolean backordersAllowed) {
this.backordersAllowed = backordersAllowed;
}
public Boolean getBackordered() {
return backordered;
}
public void setBackordered(Boolean backordered) {
this.backordered = backordered;
}
public Boolean getSoldIndividually() {
return soldIndividually;
}
public void setSoldIndividually(Boolean soldIndividually) {
this.soldIndividually = soldIndividually;
}
public String getWeight() {
return weight;
}
public void setWeight(String weight) {
this.weight = weight;
}
public Dimensions getDimensions() {
return dimensions;
}
public void setDimensions(Dimensions dimensions) {
this.dimensions = dimensions;
}
public Boolean getShippingRequired() {
return shippingRequired;
}
public void setShippingRequired(Boolean shippingRequired) {
this.shippingRequired = shippingRequired;
}
public Boolean getShippingTaxable() {
return shippingTaxable;
}
public void setShippingTaxable(Boolean shippingTaxable) {
this.shippingTaxable = shippingTaxable;
}
public String getShippingClass() {
return shippingClass;
}
public void setShippingClass(String shippingClass) {
this.shippingClass = shippingClass;
}
public Integer getShippingClassId() {
return shippingClassId;
}
public void setShippingClassId(Integer shippingClassId) {
this.shippingClassId = shippingClassId;
}
public Boolean getReviewsAllowed() {
return reviewsAllowed;
}
public void setReviewsAllowed(Boolean reviewsAllowed) {
this.reviewsAllowed = reviewsAllowed;
}
public String getAverageRating() {
return averageRating;
}
public void setAverageRating(String averageRating) {
this.averageRating = averageRating;
}
public Integer getRatingCount() {
return ratingCount;
}
public void setRatingCount(Integer ratingCount) {
this.ratingCount = ratingCount;
}
public List<Integer> getRelatedIds() {
return relatedIds;
}
public void setRelatedIds(List<Integer> relatedIds) {
this.relatedIds = relatedIds;
}
public List<Object> getUpsellIds() {
return upsellIds;
}
public void setUpsellIds(List<Object> upsellIds) {
this.upsellIds = upsellIds;
}
public List<Object> getCrossSellIds() {
return crossSellIds;
}
public void setCrossSellIds(List<Object> crossSellIds) {
this.crossSellIds = crossSellIds;
}
public Integer getParentId() {
return parentId;
}
public void setParentId(Integer parentId) {
this.parentId = parentId;
}
public String getPurchaseNote() {
return purchaseNote;
}
public void setPurchaseNote(String purchaseNote) {
this.purchaseNote = purchaseNote;
}
public List<Category> getCategories() {
return categories;
}
public void setCategories(List<Category> categories) {
this.categories = categories;
}
public List<Object> getTags() {
return tags;
}
public void setTags(List<Object> tags) {
this.tags = tags;
}
public List<Image> getImages() {
return images;
}
public void setImages(List<Image> images) {
this.images = images;
}
public List<Attribute> getAttributes() {
return attributes;
}
public void setAttributes(List<Attribute> attributes) {
this.attributes = attributes;
}
public List<Object> getDefaultAttributes() {
return defaultAttributes;
}
public void setDefaultAttributes(List<Object> defaultAttributes) {
this.defaultAttributes = defaultAttributes;
}
public List<Integer> getVariations() {
return variations;
}
public void setVariations(List<Integer> variations) {
this.variations = variations;
}
public List<Object> getGroupedProducts() {
return groupedProducts;
}
public void setGroupedProducts(List<Object> groupedProducts) {
this.groupedProducts = groupedProducts;
}
public Integer getMenuOrder() {
return menuOrder;
}
public void setMenuOrder(Integer menuOrder) {
this.menuOrder = menuOrder;
}
public List<MetaDatum> getMetaData() {
return metaData;
}
public void setMetaData(List<MetaDatum> metaData) {
this.metaData = metaData;
}
public Links getLinks() {
return links;
}
public void setLinks(Links links) {
this.links = links;
}
}
The code that I use is the following:
public void onResponse(Call call, Response response) throws IOException
{
String mMessage = response.body().string();
if (response.isSuccessful())
{
try
{
Gson gson = new Gson();
final ProductItems categoryProducts = gson.fromJson(mMessage, ProductItems.class);
response.close();
}
catch (Exception e)
{
Log.e("Error", "Failed to upload");
e.printStackTrace();
}
However, I get the following error: GSON throwing “Expected BEGIN_OBJECT but was BEGIN_ARRAY.
I have tried to change the ProductItems class to taking an object for productbycategories but then I get the following error: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected a string but was BEGIN_OBJECT at line 1 column 2324 path $.ProductsByCategory[0].meta_data[0].value. I am now a bit confused.
The reason you get this error is that the data is not consistent with the way the POJO is generated.
This is the specific part of the data that has the issue:
"meta_data": [
{
"id": 14232,
"key": "_vc_post_settings",
"value": {
"vc_grid_id": []
}
},
{
"id": 14273,
"key": "fb_product_description",
"value": ""
},
{
"id": 14274,
"key": "fb_visibility",
"value": "1"
},
Notice how the "meta_data" field is an array of objects and that these objects contain a "value" field. The data type of the "value" varies- sometimes it's an object and other times it's a string.
One possible solution would be to change the MetaDatum class so that the value is an Object:
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class MetaDatum {
...
#SerializedName("value")
#Expose
private Object value;
...
public Object getValue() {
return value;
}
public void setValue(Object value) {
this.value = value;
}
}
I'm new to Java and Vaadin and stuck during display data in a Vaadin grid. I have data in JSON format like:
[
{
"id":1,
"name":"testSiteC",
"accountId":1,
"accountData":{
"id":1,
"name":"testAccountA",
"code":"AC0001",
"salesStaffId":200,
"samplingDate":1493038800000,
"startDate":1493038800000,
"creditPeriod":15,
"cinNo":"testCinNo",
"vatRegistrationNo":"testVatRegistrationNo",
"panNo":"testPanNo",
"serviceTaxRegistrationNo":"testServiceTaxRegistrationNo",
"isActive":true,
"billingType":"testBillingType",
"billingBasis":"cup count basis",
"billingAddress":"billingAddress",
"consigneeAddress":"test",
"clientRelationshipManagerStaffId":2,
"opsManagerId":1,
"serviceTaxId":1,
"createdOn":1483209000000,
"updatedOn":1494949002000
},
"building":"3rd floor",
"locality":"Koramangala",
"city":"Bangalore",
"state":"Karnataka",
"country":"India",
"peopleCount":100,
"staffInCharge":1,
"dailyStartTime":"23:34:23",
"dailyEndTime":"23:34:34",
"createdOn":1493799889000,
"updatedOn":1494945760000,
"isActive":true,
"opsStartDate":1493730000000
}
]
Bean to be nested:
package com.chaipoint.boxc.common.model;
import java.io.Serializable;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Date;
public class SiteResponse implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private Long id;
private String name;
private Integer accountId;
private AccountResponse accountData;
private String building;
private String locality;
private String city;
private String state;
private String country;
private Integer peopleCount;
private Integer staffInCharge;
private Time dailyStartTime;
private Time dailyEndTime;
private Date createdOn;
private Timestamp updatedOn;
private Boolean isActive;
private Date opsStartDate;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAccountId() {
return accountId;
}
public void setAccountId(Integer accountId) {
this.accountId = accountId;
}
public AccountResponse getAccountData() {
return accountData;
}
public void setAccountData(AccountResponse accountData) {
this.accountData = accountData;
}
public String getBuilding() {
return building;
}
public void setBuilding(String building) {
this.building = building;
}
public String getLocality() {
return locality;
}
public void setLocality(String locality) {
this.locality = locality;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public Integer getPeopleCount() {
return peopleCount;
}
public void setPeopleCount(Integer peopleCount) {
this.peopleCount = peopleCount;
}
public Integer getStaffInCharge() {
return staffInCharge;
}
public void setStaffInCharge(Integer staffInCharge) {
this.staffInCharge = staffInCharge;
}
public Time getDailyStartTime() {
return dailyStartTime;
}
public void setDailyStartTime(Time dailyStartTime) {
this.dailyStartTime = dailyStartTime;
}
public Time getDailyEndTime() {
return dailyEndTime;
}
public void setDailyEndTime(Time dailyEndTime) {
this.dailyEndTime = dailyEndTime;
}
public Date getCreatedOn() {
return createdOn;
}
public void setCreatedOn(Date createdOn) {
this.createdOn = createdOn;
}
public Timestamp getUpdatedOn() {
return updatedOn;
}
public void setUpdatedOn(Timestamp updatedOn) {
this.updatedOn = updatedOn;
}
public Boolean getIsActive() {
return isActive;
}
public void setIsActive(Boolean isActive) {
this.isActive = isActive;
}
public Date getOpsStartDate() {
return opsStartDate;
}
public void setOpsStartDate(Date opsStartDate) {
this.opsStartDate = opsStartDate;
}
public static long getSerialversionuid() {
return serialVersionUID;
}
}
Bean containing a nested bean
public class SitePantryResponse implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private Long id;
private String name;
private Integer siteId;
private SiteResponse siteData;
private Integer floorNo;
private Date createdOn;
private Timestamp updatedOn;
private Boolean isActive;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getSiteId() {
return siteId;
}
public void setSiteId(Integer siteId) {
this.siteId = siteId;
}
public SiteResponse getSiteData() {
return siteData;
}
public void setSiteData(SiteResponse siteData) {
this.siteData = siteData;
}
public Integer getFloorNo() {
return floorNo;
}
public void setFloorNo(Integer floorNo) {
this.floorNo = floorNo;
}
public Date getCreatedOn() {
return createdOn;
}
public void setCreatedOn(Date createdOn) {
this.createdOn = createdOn;
}
public Timestamp getUpdatedOn() {
return updatedOn;
}
public void setUpdatedOn(Timestamp updatedOn) {
this.updatedOn = updatedOn;
}
public Boolean getIsActive() {
return isActive;
}
public void setIsActive(Boolean isActive) {
this.isActive = isActive;
}
public static long getSerialversionuid() {
return serialVersionUID;
}
}
So, while displaying data into the grid like table.addColumn(SitePantryResponse::getSiteData::getName).setCaption("Site Name") it throws:
The target type of this expression must be a functional interface` error.
SitePantryResponse::getSiteData::getName
It's not possible to chain method references like that. You can use simple lambda expression instead:
table.addColumn(r -> r.getSideDate().getName()).setCaption("Site Name")
or if you really want to use method references, you can use a helper method which will chain them and return ValueProvider which can be later passed to Grid.addColumn:
<A, B, C> ValueProvider<A, C> chain(Function<A, B> f1, Function<B, C> f2) {
return f1.andThen(f2)::apply;
}
With this you can write:
table.addColumn(chain(SitePantryResponse::getSiteData, SiteResponse::getName)).setCaption("Site Name")
but, as you can see, this makes the code more complicated and longer, so there is no reason to use this approach over simple lambda expression.
I'm having trouble trying to understand how realm.io persist/save objects.
I have 3 Objects (Inventory, InventoryItem and Product);
When I create a Inventory containing InventoryItems it works fine until i close the app. When i re-open the app all InventoryItems loses the reference to Product and start to show "null" instead.
Strange thing is all other attributes like Inventory reference to InventoryItem is persisted fine. Just problem with Products.
this is how i'm trying to do:
Model
Product
public class Product extends RealmObject {
#PrimaryKey
private String id;
#Required
private String description;
private int qtdUnityType1;
private int qtdUnityType2;
private int qtdUnityType3;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public int getQtdUnityType1() {
return qtdUnityType1;
}
public void setQtdUnityType1(int qtdUnityType1) {
this.qtdUnityType1 = qtdUnityType1;
}
public int getQtdUnityType2() {
return qtdUnityType2;
}
public void setQtdUnityType2(int qtdUnityType2) {
this.qtdUnityType2 = qtdUnityType2;
}
public int getQtdUnityType3() {
return qtdUnityType3;
}
public void setQtdUnityType3(int qtdUnityType3) {
this.qtdUnityType3 = qtdUnityType3;
}
}
Inventory
public class Inventory extends RealmObject {
#PrimaryKey
private String id;
#Required
private String type;
#Required
private Date createdAt;
#Required
private String status;
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
private RealmList<InventoryItem> listItems;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public Date getCreatedAt() {
return createdAt;
}
public void setCreatedAt(Date createdAt) {
this.createdAt = createdAt;
}
public RealmList<InventoryItem> getListItems() {
return listItems;
}
public void setListItems(RealmList<InventoryItem> listItems) {
this.listItems = listItems;
}
}
InventoryItem
public class InventoryItem extends RealmObject {
#PrimaryKey
private String idItem;
private Inventory inventory;
private Product product;
public Product getProduct() {
return product;
}
public void setProduct(Product product) {
this.product = product;
}
private Date expirationDate;
private int qtdUnityType1;
private int qtdUnityType2;
private int qtdUnityType3;
private int qtdDiscard;
public String getIdItem() {
return idItem;
}
public void setIdItem(String idItem) {
this.idItem = idItem;
}
public Inventory getInventory() {
return inventory;
}
public void setInventory(Inventory inventory) {
this.inventory = inventory;
}
public Date getExpirationDate() {
return expirationDate;
}
public void setExpirationDate(Date expirationDate) {
this.expirationDate = expirationDate;
}
public int getQtdUnityType1() {
return qtdUnityType1;
}
public void setQtdUnityType1(int qtdUnityType1) {
this.qtdUnityType1 = qtdUnityType1;
}
public int getQtdUnityType2() {
return qtdUnityType2;
}
public void setQtdUnityType2(int qtdUnityType2) {
this.qtdUnityType2 = qtdUnityType2;
}
public int getQtdUnityType3() {
return qtdUnityType3;
}
public void setQtdUnityType3(int qtdUnityType3) {
this.qtdUnityType3 = qtdUnityType3;
}
public int getQtdDiscard() {
return qtdDiscard;
}
public void setQtdDiscard(int qtdDiscard) {
this.qtdDiscard = qtdDiscard;
}
}
and finally one of the millions ways i tried to persist
realm.beginTransaction();
Inventory inventory = realm.createObject(Inventory.class);
inventory.setId(id);
inventory.setCreatedAt(new DateTime().toDate());
if (radioGroup.getCheckedRadioButtonId() == R.id.rbInventario) {
inventory.setType("Inventário");
} else {
inventory.setType("Validade");
}
inventory.setStatus("Aberto");
RealmList<InventoryItem> inventoryItems = new RealmList<>();
RealmResults<Product> productsRealmResults = realm.allObjects(Product.class);
for (int i = 1; i <= productsRealmResults.size(); i++) {
InventoryItem item = realm.createObject(InventoryItem.class);
item.setIdProduct(productsRealmResults.get(i - 1).getId() + " - " + productsRealmResults.get(i - 1).getDescription());
item.setProduct(productsRealmResults.get(i - 1));
item.setIdItem(i + "-" + id);
item.setInventory(inventory);
item = realm.copyToRealmOrUpdate(item);
item = realm.copyToRealmOrUpdate(item);
inventoryItems.add(item);
}
inventory.setListItems(inventoryItems);
realm.copyToRealmOrUpdate(inventory);
realm.commitTransaction();
I already looked trough some answers here like this one:
stack answer
and the Java-examples (person, dog, cat)
provided with the API
but I can't understand how to properly insert this.
The problem is that you are setting a list of InventoryItem elements which are not added to the Realm database.
Change InventoryItem item = new InventoryItem(); to InventoryItem item = realm.createObject(InventoryItem.class);
Also, the inventoryItems themselves aren't stored in Realm db. Add realm.copyToRealmOrUpdate(inventoryItems) after the loop.
I am pretty new to Hibernate and JPA implementation in Spring, so basically have set up a MySQL 5 database which maps to the domain objects below.
I am trying to search for Location on the Company_Details table but I can't figure out how to search the class Product_Details for Product_Name at the same time
If anyone could help that would be great.
Company_Details
#Entity
public class Company_Details implements Serializable{
/**
*
*/
private static final long serialVersionUID = 3336251433829975771L;
#Id
#GeneratedValue
private Integer Id;
private String Company;
private String Address_Line_1;
private String Address_Line_2;
private String Postcode;
private String County;
private String Country;
private String Mobile_Number;
private String Telephone_Number;
private String URL;
private String Contact;
private String Logo_URL;
private double Amount_Overall;
private double Amount_Paid;
private Timestamp Date_Joined;
private int Account_Details;
#OneToMany(fetch = FetchType.EAGER, mappedBy = "Company_Id")
private List<Product_Details> products;
public Integer getId() {
return Id;
}
public void setId(Integer id) {
Id = id;
}
public String getCompany() {
return Company;
}
public void setCompany(String company) {
Company = company;
}
public String getAddress_Line_1() {
return Address_Line_1;
}
public void setAddress_Line_1(String address_Line_1) {
Address_Line_1 = address_Line_1;
}
public String getAddress_Line_2() {
return Address_Line_2;
}
public void setAddress_Line_2(String address_Line_2) {
Address_Line_2 = address_Line_2;
}
public String getPostcode() {
return Postcode;
}
public void setPostcode(String postcode) {
Postcode = postcode;
}
public String getCounty() {
return County;
}
public void setCounty(String county) {
County = county;
}
public String getCountry() {
return Country;
}
public void setCountry(String country) {
Country = country;
}
public String getMobile_Number() {
return Mobile_Number;
}
public void setMobile_Number(String mobile_Number) {
Mobile_Number = mobile_Number;
}
public String getTelephone_Number() {
return Telephone_Number;
}
public void setTelephone_Number(String telephone_Number) {
Telephone_Number = telephone_Number;
}
public String getURL() {
return URL;
}
public void setURL(String uRL) {
URL = uRL;
}
public String getContact() {
return Contact;
}
public void setContact(String contact) {
Contact = contact;
}
public String getLogo_URL() {
return Logo_URL;
}
public void setLogo_URL(String logo_URL) {
Logo_URL = logo_URL;
}
public double getAmount_Overall() {
return Amount_Overall;
}
public void setAmount_Overall(double amount_Overall) {
Amount_Overall = amount_Overall;
}
public double getAmount_Paid() {
return Amount_Paid;
}
public void setAmount_Paid(double amount_Paid) {
Amount_Paid = amount_Paid;
}
public Timestamp getDate_Joined() {
return Date_Joined;
}
public void setDate_Joined(Timestamp date_Joined) {
Date_Joined = date_Joined;
}
public int getAccount_Details() {
return Account_Details;
}
public void setAccount_Details(int account_Details) {
Account_Details = account_Details;
}
public List<Product_Details> getProducts() {
return products;
}
public void setProducts(List<Product_Details> products) {
this.products = products;
}
Product_Details
#Entity
public class Product_Details implements Serializable{
/**
*
*/
private static final long serialVersionUID = 6477618197240654478L;
#Id
#GeneratedValue
private Integer Id;
private Integer Company_Id;
private String Product_Name;
private String Description;
private String Main_Photo_URL;
private String Other_Photo_URLS;
private Integer Total_Bookings;
private double Average_Rating;
private Integer Number_Of_Slots;
private Integer Time_Per_Slot;
private double Price_Per_Slot;
private String Monday_Open;
private String Tuesday_Open;
private String Wednesday_Open;
private String Thursday_Open;
private String Friday_Open;
private String Saturday_Open;
private String Sunday_Open;
private String Dates_Closed;
public Integer getId() {
return Id;
}
public void setId(Integer id) {
Id = id;
}
public Integer getCompany_Id() {
return Company_Id;
}
public void setCompany_Id(Integer company_Id) {
Company_Id = company_Id;
}
public String getProduct_Name() {
return Product_Name;
}
public void setProduct_Name(String product_Name) {
Product_Name = product_Name;
}
public String getDescription() {
return Description;
}
public void setDescription(String description) {
Description = description;
}
public String getMain_Photo_URL() {
return Main_Photo_URL;
}
public void setMain_Photo_URL(String main_Photo_URL) {
Main_Photo_URL = main_Photo_URL;
}
public String getOther_Photos_URLS() {
return Other_Photo_URLS;
}
public void setOther_Photos_URLS(String other_Photo_URLS) {
Other_Photo_URLS = other_Photo_URLS;
}
public Integer getTotal_Bookings() {
return Total_Bookings;
}
public void setTotal_Bookings(Integer total_Bookings) {
Total_Bookings = total_Bookings;
}
public double getAverage_Rating() {
return Average_Rating;
}
public void setAverage_Rating(double average_Rating) {
Average_Rating = average_Rating;
}
public Integer getNumber_Of_Slots() {
return Number_Of_Slots;
}
public void setNumber_Of_Slots(Integer number_Of_Slots) {
Number_Of_Slots = number_Of_Slots;
}
public Integer getTime_Per_Slot() {
return Time_Per_Slot;
}
public void setTime_Per_Slot(Integer time_Per_Slot) {
Time_Per_Slot = time_Per_Slot;
}
public double getPrice_Per_Slot() {
return Price_Per_Slot;
}
public void setPrice_Per_Slot(double price_Per_Slot) {
Price_Per_Slot = price_Per_Slot;
}
public String getMonday_Open() {
return Monday_Open;
}
public void setMonday_Open(String monday_Open) {
Monday_Open = monday_Open;
}
public String getTuesday_Open() {
return Tuesday_Open;
}
public void setTuesday_Open(String tuesday_Open) {
Tuesday_Open = tuesday_Open;
}
public String getWednesday_Open() {
return Wednesday_Open;
}
public void setWednesday_Open(String wednesday_Open) {
Wednesday_Open = wednesday_Open;
}
public String getThursday_Open() {
return Thursday_Open;
}
public void setThursday_Open(String thursday_Open) {
Thursday_Open = thursday_Open;
}
public String getFriday_Open() {
return Friday_Open;
}
public void setFriday_Open(String friday_Open) {
Friday_Open = friday_Open;
}
public String getSaturday_Open() {
return Saturday_Open;
}
public void setSaturday_Open(String saturday_Open) {
Saturday_Open = saturday_Open;
}
public String getSunday_Open() {
return Sunday_Open;
}
public void setSunday_Open(String sunday_Open) {
Sunday_Open = sunday_Open;
}
public String getDates_Closed() {
return Dates_Closed;
}
public void setDates_Closed(String dates_Closed) {
Dates_Closed = dates_Closed;
}
}
#Service
public class ProductServiceImpl implements ProductService{
private final static Logger LOG = Logger.getLogger(ProductServiceImpl.class.getName());
#PersistenceContext
EntityManager em;
#Transactional
public List<Company_Details> search(Search search) {
LOG.info("Entering search method");
CriteriaBuilder builder = em.getCriteriaBuilder();
CriteriaQuery<Company_Details> c = builder.createQuery(Company_Details.class);
Root<Company_Details> companyRoot = c.from(Company_Details.class);
c.select(companyRoot);
c.where(builder.equal(companyRoot.get("County"),search.getLocation()));
return em.createQuery(c).getResultList();
}
}
You need two criteria: criteria on the Company_Details class
And criteria on the Product_Details class
Then
Criteria crit1 = session.createCriteria(Company_Details.class);
crit1.add(restriction)
Criteria crit2 = crit1.createCriteria("products");
crit2.add(restriction)
// Then query crit1
List results = crit1.list();
I'm trying to figure out a way to transform this JSON String into a Java object graph but I'm unable to do so. Below, I've inserted my JSON String, and my two classes. I've verified that its a valid json structure. I've been trying googles api (http://sites.google.com/site/gson/gson-user-guide) but it doesn't map the nested Photo Collection. Any ideas or alternate libraries?
{"photos":{"page":1,"pages":73514,"perpage":50,"total":"3675674","photo":[{"id":"5516612975","owner":"23723942#N07","secret":"b8fb1fda57","server":"5213","farm":6,"title":"P3100006.JPG","ispublic":1,"isfriend":0,"isfamily":0},{"id":"5516449299","owner":"81031835#N00","secret":"67b56722da","server":"5171","farm":6,"title":"Kaiser Boys Volleyball","ispublic":1,"isfriend":0,"isfamily":0}]},"stat":"ok"}
Photos.java
public class Photos {
private int pages;
private int perpage;
private String total;
private List<Photo> photo;
private String stat;
public int getPages() {
return pages;
}
public void setPages(int pages) {
this.pages = pages;
}
public int getPerpage() {
return perpage;
}
public void setPerpage(int perpage) {
this.perpage = perpage;
}
public String getTotal() {
return total;
}
public void setTotal(String total) {
this.total = total;
}
public List<Photo> getPhoto() {
return photo;
}
public void setPhoto(List<Photo> photo) {
this.photo = photo;
}
public String getStat() {
return stat;
}
public void setStat(String stat) {
this.stat = stat;
}
}
Photo.java:
public class Photo {
private String id;
private String owner;
private String secret;
private String server;
private String farm;
private String title;
private int isPublic;
private int isFriend;
private int isFamily;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getOwner() {
return owner;
}
public void setOwner(String owner) {
this.owner = owner;
}
public String getSecret() {
return secret;
}
public void setSecret(String secret) {
this.secret = secret;
}
public String getServer() {
return server;
}
public void setServer(String server) {
this.server = server;
}
public String getFarm() {
return farm;
}
public void setFarm(String farm) {
this.farm = farm;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public int getIsPublic() {
return isPublic;
}
public void setIsPublic(int isPublic) {
this.isPublic = isPublic;
}
public int getIsFriend() {
return isFriend;
}
public void setIsFriend(int isFriend) {
this.isFriend = isFriend;
}
public int getIsFamily() {
return isFamily;
}
public void setIsFamily(int isFamily) {
this.isFamily = isFamily;
}
}
Use Jackson. It'll take care of converting to and from JSON. It provides multiple ways of approaching conversion, and is well-integrated with frameworks like Spring. Definitely one to know.