I am trying to convert the following API data to a java class. I'm specifically interested in the picking out the timeSeriesDaily field with a date key and the closingStockPrice fields. I tried using the following data structures to capture the relevant fields
public class AlphavantageData {
List<Map<String,TimeSeriesDaily>> timeSeriesDaily;
public List<Map<String, TimeSeriesDaily>> getTimeSeriesDaily() {
return timeSeriesDaily;
}
public void setTimeSeriesDaily(List<Map<String, TimeSeriesDaily>> timeSeriesDaily) {
this.timeSeriesDaily = timeSeriesDaily;
}
}
public class TimeSeriesDaily {
private Map<String,DayCloseStockPrice> dayStockPriceRecords;
public Map<String, DayCloseStockPrice> getDayStockPriceRecords() {
return dayStockPriceRecords;
}
public void setDayStockPriceRecords(Map<String, DayCloseStockPrice> dayStockPriceRecords) {
this.dayStockPriceRecords = dayStockPriceRecords;
}
}
public class DayCloseStockPrice {
private String closingStockPrice;
public String getClosingStockPrice() {
return closingStockPrice;
}
public void setClosingStockPrice(String closingStockPrice) {
this.closingStockPrice = closingStockPrice;
}
}
However I keep getting the following GSON error:
java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 10 column 10 path $.timeSeriesDaily[0]
Would appreciate it anyone has answers as to why this isn't working and how to fix it.
Thanks.
PS: This is a sample of the JSON text.
{
"Meta Data": {
"1. Information": "Daily Time Series with Splits and Dividend Events",
"2. Symbol": "MSFT",
"3. Last Refreshed": "2019-10-24",
"4. Output Size": "Compact",
"5. Time Zone": "US/Eastern"
},
"timeSeriesDaily": [
"2019-10-24": {
"1. open": "139.3900",
"2. high": "140.4100",
"3. low": "138.6700",
"closingStockPrice": "139.9400",
"5. adjusted close": "139.9400",
"6. volume": "34434281",
"7. dividend amount": "0.0000",
"8. split coefficient": "1.0000"
},
Make sure you json object is properly formatted and you is compatible with your POJO, Later you can use below code to do different type of conversion -
Gson gson = new Gson();
// 1. JSON file to Java object
Staff staff = gson.fromJson(new FileReader("C:\\projects\\test.json"), Test.class);
// 2. JSON string to Java object
String json = "{'name' : 'test'}";
Staff staff = gson.fromJson(json, Test.class);
// 3. JSON file to JsonElement -> String
JsonElement json = gson.fromJson(new FileReader("C:\\projects\\test.json"), JsonElement.class);
String result = gson.toJson(json);
Maven dependency -
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>x.x.x</version>
</dependency>
Did you try going through the below similar question? May be you need to reorganize your class structure.
https://stackoverflow.com/questions/19169754/parsing-nested-json-data-using-gson
Your json structure is not right, however I have tried the following json with your classes and it's worked
{
"Meta Data": {
"1. Information": "Daily Time Series with Splits and Dividend Events",
"2. Symbol": "MSFT",
"3. Last Refreshed": "2019-10-24",
"4. Output Size": "Compact",
"5. Time Zone": "US/Eastern"
},
"timeSeriesDaily": [
{
"2019-10-24": {
"1. open": "139.3900",
"2. high": "140.4100",
"3. low": "138.6700",
"closingStockPrice": "139.9400",
"5. adjusted close": "139.9400",
"6. volume": "34434281",
"7. dividend amount": "0.0000",
"8. split coefficient": "1.0000"
}
}
]
}
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