Spring RestTemplate with paginated API

Question

Our REST APIs are returning results in Pages. Here is an example of one Controller

@RequestMapping(value = \"/search\", method = RequestMethod.GET, produces          


        

Answer 1

Solution in Kotlin

import com.fasterxml.jackson.annotation.JsonCreator
import com.fasterxml.jackson.annotation.JsonProperty
import com.fasterxml.jackson.databind.JsonNode
import org.springframework.data.domain.PageImpl
import org.springframework.data.domain.PageRequest
import org.springframework.data.domain.Pageable

import java.util.ArrayList

class RestResponsePage : PageImpl {
    @JsonCreator(mode = JsonCreator.Mode.PROPERTIES)
    constructor(@JsonProperty("content") content: List,
                @JsonProperty("number") number: Int,
                @JsonProperty("size") size: Int,
                @JsonProperty("totalElements") totalElements: Long?,
                @JsonProperty("pageable") pageable: JsonNode,
                @JsonProperty("last") last: Boolean,
                @JsonProperty("totalPages") totalPages: Int,
                @JsonProperty("sort") sort: JsonNode,
                @JsonProperty("first") first: Boolean,
                @JsonProperty("numberOfElements") numberOfElements: Int) : super(content, PageRequest.of(number, size), totalElements!!) {
    }

    constructor(content: List, pageable: Pageable, total: Long) : super(content, pageable, total) {}

    constructor(content: List) : super(content) {}

    constructor() : super(ArrayList()) {}
}

and request

var response: ResponseEntity<*> = restTemplate.getForEntity>(url)

Solution in Java

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.JsonNode;
import org.springframework.data.domain.PageImpl;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;

import java.util.ArrayList;
import java.util.List;

public class RestResponsePage extends PageImpl {
    @JsonCreator(mode = JsonCreator.Mode.PROPERTIES)
    public RestResponsePage(@JsonProperty("content") List content,
                        @JsonProperty("number") int number,
                        @JsonProperty("size") int size,
                        @JsonProperty("totalElements") Long totalElements,
                        @JsonProperty("pageable") JsonNode pageable,
                        @JsonProperty("last") boolean last,
                        @JsonProperty("totalPages") int totalPages,
                        @JsonProperty("sort") JsonNode sort,
                        @JsonProperty("first") boolean first,
                        @JsonProperty("numberOfElements") int numberOfElements) {

        super(content, PageRequest.of(number, size), totalElements);
    }

    public RestResponsePage(List content, Pageable pageable, long total) {
        super(content, pageable, total);
    }

    public RestResponsePage(List content) {
        super(content);
    }

    public RestResponsePage() {
        super(new ArrayList<>());
    }
}