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How can I parse a JSON object with an empty value in Java?
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I'm building a test suite to test my Vert.x API that implements a couple of sorting algorithms. One of the test cases that I'd like to cover is to handle null or empty values in the unsorted array:
The request body is a JSON string that I create like this:
final String json = "{"arr": [99, [2, 4, ], [[55]], 0]}";
Currently I'm parsing the JSON in the request handler using Vert.x JsonObject and JsonArray.
import io.vertx.core.json.JsonObject;
import io.vertx.core.json.JsonArray;
private void doBubbleSort(RoutingContext routingContext) {
JsonObject json = routingContext.getBodyAsJson();
JsonArray jsonArray = json.getJsonArray("arr");
....
}
This is the error I'm getting
SEVERE: Unexpected exception in route
io.vertx.core.json.DecodeException: Failed to decode:Unexpected character (',' (code 44)): expected a value
at [Source: (io.netty.buffer.ByteBufInputStream); line: 1, column: 49]
at io.vertx.core.json.Json.decodeValue(Json.java:172)
at io.vertx.core.json.JsonObject.fromBuffer(JsonObject.java:960)
at io.vertx.core.json.JsonObject.<init>(JsonObject.java:73)
at io.vertx.ext.web.impl.RoutingContextImpl.getBodyAsJson(RoutingContextImpl.java:263)
at io.vertx.ext.web.impl.RoutingContextDecorator.getBodyAsJson(RoutingContextDecorator.java:123)
at za.co.offerzen.SortVerticle.doBubbleSort(SortVerticle.java:80)
at io.vertx.ext.web.impl.BlockingHandlerDecorator.lambda$handle$0(BlockingHandlerDecorator.java:48)
at io.vertx.core.impl.ContextImpl.lambda$executeBlocking$2(ContextImpl.java:272)
at io.vertx.core.impl.TaskQueue.run(TaskQueue.java:76)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)
How can I parse the request when there is an empty value in the json? Ideally, I only want all the int values from the request body and ignore or strip out empty, null or missing values. Do I need to iterate over the request body before parsing it to json, and check whether each value instanceof int? Or is there another way?
Apart from JsonObject and JsonArray, I can get the request body as a Buffer or as a String
Thanks.
json java-8 null vert.x
asked Jan 3 at 11:11
krankitkrankit
2217
add a comment |
I'm building a test suite to test my Vert.x API that implements a couple of sorting algorithms. One of the test cases that I'd like to cover is to handle null or empty values in the unsorted array:
The request body is a JSON string that I create like this:
final String json = "{"arr": [99, [2, 4, ], [[55]], 0]}";
Currently I'm parsing the JSON in the request handler using Vert.x JsonObject and JsonArray.
import io.vertx.core.json.JsonObject;
import io.vertx.core.json.JsonArray;
private void doBubbleSort(RoutingContext routingContext) {
JsonObject json = routingContext.getBodyAsJson();
JsonArray jsonArray = json.getJsonArray("arr");
....
}
This is the error I'm getting
SEVERE: Unexpected exception in route
io.vertx.core.json.DecodeException: Failed to decode:Unexpected character (',' (code 44)): expected a value
at [Source: (io.netty.buffer.ByteBufInputStream); line: 1, column: 49]
at io.vertx.core.json.Json.decodeValue(Json.java:172)
at io.vertx.core.json.JsonObject.fromBuffer(JsonObject.java:960)
at io.vertx.core.json.JsonObject.<init>(JsonObject.java:73)
at io.vertx.ext.web.impl.RoutingContextImpl.getBodyAsJson(RoutingContextImpl.java:263)
at io.vertx.ext.web.impl.RoutingContextDecorator.getBodyAsJson(RoutingContextDecorator.java:123)
at za.co.offerzen.SortVerticle.doBubbleSort(SortVerticle.java:80)
at io.vertx.ext.web.impl.BlockingHandlerDecorator.lambda$handle$0(BlockingHandlerDecorator.java:48)
at io.vertx.core.impl.ContextImpl.lambda$executeBlocking$2(ContextImpl.java:272)
at io.vertx.core.impl.TaskQueue.run(TaskQueue.java:76)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)
How can I parse the request when there is an empty value in the json? Ideally, I only want all the int values from the request body and ignore or strip out empty, null or missing values. Do I need to iterate over the request body before parsing it to json, and check whether each value instanceof int? Or is there another way?
Apart from JsonObject and JsonArray, I can get the request body as a Buffer or as a String
Thanks.
json java-8 null vert.x
asked Jan 3 at 11:11
krankitkrankit
2217
This json should actually run into an exception/error. This is just not correct json and it's no wonder that it will cause a parser to fail.
– maio290
Jan 3 at 11:22
@maio290 okay. that's not really helpful. I'm trying to create a json request with an empty/missing value. So I'm also not surprised that it fails, but I'm looking for another solution, like doing something before parsing.
– krankit
Jan 3 at 11:40
You cannot useroutingContext.getBodyAsJson();if its not a valid json this will throw an exception. UseroutingContext.getBodyAsString()and parse that string as you wish.
– taygetos
Jan 5 at 13:41
add a comment |
I'm building a test suite to test my Vert.x API that implements a couple of sorting algorithms. One of the test cases that I'd like to cover is to handle null or empty values in the unsorted array:
The request body is a JSON string that I create like this:
final String json = "{"arr": [99, [2, 4, ], [[55]], 0]}";
Currently I'm parsing the JSON in the request handler using Vert.x JsonObject and JsonArray.
import io.vertx.core.json.JsonObject;
import io.vertx.core.json.JsonArray;
private void doBubbleSort(RoutingContext routingContext) {
JsonObject json = routingContext.getBodyAsJson();
JsonArray jsonArray = json.getJsonArray("arr");
....
}
This is the error I'm getting
SEVERE: Unexpected exception in route
io.vertx.core.json.DecodeException: Failed to decode:Unexpected character (',' (code 44)): expected a value
at [Source: (io.netty.buffer.ByteBufInputStream); line: 1, column: 49]
at io.vertx.core.json.Json.decodeValue(Json.java:172)
at io.vertx.core.json.JsonObject.fromBuffer(JsonObject.java:960)
at io.vertx.core.json.JsonObject.<init>(JsonObject.java:73)
at io.vertx.ext.web.impl.RoutingContextImpl.getBodyAsJson(RoutingContextImpl.java:263)
at io.vertx.ext.web.impl.RoutingContextDecorator.getBodyAsJson(RoutingContextDecorator.java:123)
at za.co.offerzen.SortVerticle.doBubbleSort(SortVerticle.java:80)
at io.vertx.ext.web.impl.BlockingHandlerDecorator.lambda$handle$0(BlockingHandlerDecorator.java:48)
at io.vertx.core.impl.ContextImpl.lambda$executeBlocking$2(ContextImpl.java:272)
at io.vertx.core.impl.TaskQueue.run(TaskQueue.java:76)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)
How can I parse the request when there is an empty value in the json? Ideally, I only want all the int values from the request body and ignore or strip out empty, null or missing values. Do I need to iterate over the request body before parsing it to json, and check whether each value instanceof int? Or is there another way?
Apart from JsonObject and JsonArray, I can get the request body as a Buffer or as a String
Thanks.
json java-8 null vert.x
asked Jan 3 at 11:11
krankitkrankit
2217
I'm building a test suite to test my Vert.x API that implements a couple of sorting algorithms. One of the test cases that I'd like to cover is to handle null or empty values in the unsorted array:
The request body is a JSON string that I create like this:
final String json = "{"arr": [99, [2, 4, ], [[55]], 0]}";
Currently I'm parsing the JSON in the request handler using Vert.x JsonObject and JsonArray.
import io.vertx.core.json.JsonObject;
import io.vertx.core.json.JsonArray;
private void doBubbleSort(RoutingContext routingContext) {
JsonObject json = routingContext.getBodyAsJson();
JsonArray jsonArray = json.getJsonArray("arr");
....
}
This is the error I'm getting
SEVERE: Unexpected exception in route
io.vertx.core.json.DecodeException: Failed to decode:Unexpected character (',' (code 44)): expected a value
at [Source: (io.netty.buffer.ByteBufInputStream); line: 1, column: 49]
at io.vertx.core.json.Json.decodeValue(Json.java:172)
at io.vertx.core.json.JsonObject.fromBuffer(JsonObject.java:960)
at io.vertx.core.json.JsonObject.<init>(JsonObject.java:73)
at io.vertx.ext.web.impl.RoutingContextImpl.getBodyAsJson(RoutingContextImpl.java:263)
at io.vertx.ext.web.impl.RoutingContextDecorator.getBodyAsJson(RoutingContextDecorator.java:123)
at za.co.offerzen.SortVerticle.doBubbleSort(SortVerticle.java:80)
at io.vertx.ext.web.impl.BlockingHandlerDecorator.lambda$handle$0(BlockingHandlerDecorator.java:48)
at io.vertx.core.impl.ContextImpl.lambda$executeBlocking$2(ContextImpl.java:272)
at io.vertx.core.impl.TaskQueue.run(TaskQueue.java:76)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)
How can I parse the request when there is an empty value in the json? Ideally, I only want all the int values from the request body and ignore or strip out empty, null or missing values. Do I need to iterate over the request body before parsing it to json, and check whether each value instanceof int? Or is there another way?
Apart from JsonObject and JsonArray, I can get the request body as a Buffer or as a String
Thanks.
json java-8 null vert.x
json java-8 null vert.x
asked Jan 3 at 11:11
krankitkrankit
2217
asked Jan 3 at 11:11
krankitkrankit
2217
asked Jan 3 at 11:11
krankitkrankit
2217
asked Jan 3 at 11:11
krankitkrankit
2217
asked Jan 3 at 11:11
krankitkrankit
2217
2217
This json should actually run into an exception/error. This is just not correct json and it's no wonder that it will cause a parser to fail.
– maio290
Jan 3 at 11:22
@maio290 okay. that's not really helpful. I'm trying to create a json request with an empty/missing value. So I'm also not surprised that it fails, but I'm looking for another solution, like doing something before parsing.
– krankit
Jan 3 at 11:40
You cannot useroutingContext.getBodyAsJson();if its not a valid json this will throw an exception. UseroutingContext.getBodyAsString()and parse that string as you wish.
– taygetos
Jan 5 at 13:41
add a comment |
This json should actually run into an exception/error. This is just not correct json and it's no wonder that it will cause a parser to fail.
– maio290
Jan 3 at 11:22
@maio290 okay. that's not really helpful. I'm trying to create a json request with an empty/missing value. So I'm also not surprised that it fails, but I'm looking for another solution, like doing something before parsing.
– krankit
Jan 3 at 11:40
You cannot useroutingContext.getBodyAsJson();if its not a valid json this will throw an exception. UseroutingContext.getBodyAsString()and parse that string as you wish.
– taygetos
Jan 5 at 13:41
This json should actually run into an exception/error. This is just not correct json and it's no wonder that it will cause a parser to fail.
– maio290
Jan 3 at 11:22
This json should actually run into an exception/error. This is just not correct json and it's no wonder that it will cause a parser to fail.
– maio290
Jan 3 at 11:22
@maio290 okay. that's not really helpful. I'm trying to create a json request with an empty/missing value. So I'm also not surprised that it fails, but I'm looking for another solution, like doing something before parsing.
– krankit
Jan 3 at 11:40
@maio290 okay. that's not really helpful. I'm trying to create a json request with an empty/missing value. So I'm also not surprised that it fails, but I'm looking for another solution, like doing something before parsing.
– krankit
Jan 3 at 11:40
You cannot use
routingContext.getBodyAsJson(); if its not a valid json this will throw an exception. Use routingContext.getBodyAsString() and parse that string as you wish.– taygetos
Jan 5 at 13:41
You cannot use
routingContext.getBodyAsJson(); if its not a valid json this will throw an exception. Use routingContext.getBodyAsString() and parse that string as you wish.– taygetos
Jan 5 at 13:41
add a comment |
1 Answer
1
active
oldest
votes
If you really mean that:
ideally, I only want all the int values from the request body
you can simply do the following:
final String json = "{"arr": [99, [2, 4, ], [[55]], 0]}";
final String regularExpression = "([^\d])+";
Pattern pattern = Pattern.compile(regularExpression);
String results = pattern.split(json);
List<Integer> numbers = new ArrayList<>();
for (String result : results) {
try {
numbers.add(Integer.valueOf(result));
} catch (NumberFormatException e) {
}
}
for (int number : numbers) {
System.out.println(number);
}
This would output:
99
2
4
55
0
But this really doesn't give a damn about this being a json. It's just extracting numbers from a string.
answered Jan 3 at 12:10
maio290maio290
2,122615
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If you really mean that:
ideally, I only want all the int values from the request body
you can simply do the following:
final String json = "{"arr": [99, [2, 4, ], [[55]], 0]}";
final String regularExpression = "([^\d])+";
Pattern pattern = Pattern.compile(regularExpression);
String results = pattern.split(json);
List<Integer> numbers = new ArrayList<>();
for (String result : results) {
try {
numbers.add(Integer.valueOf(result));
} catch (NumberFormatException e) {
}
}
for (int number : numbers) {
System.out.println(number);
}
This would output:
99
2
4
55
0
But this really doesn't give a damn about this being a json. It's just extracting numbers from a string.
answered Jan 3 at 12:10
maio290maio290
2,122615
add a comment |
If you really mean that:
ideally, I only want all the int values from the request body
you can simply do the following:
final String json = "{"arr": [99, [2, 4, ], [[55]], 0]}";
final String regularExpression = "([^\d])+";
Pattern pattern = Pattern.compile(regularExpression);
String results = pattern.split(json);
List<Integer> numbers = new ArrayList<>();
for (String result : results) {
try {
numbers.add(Integer.valueOf(result));
} catch (NumberFormatException e) {
}
}
for (int number : numbers) {
System.out.println(number);
}
This would output:
99
2
4
55
0
But this really doesn't give a damn about this being a json. It's just extracting numbers from a string.
answered Jan 3 at 12:10
maio290maio290
2,122615
add a comment |
If you really mean that:
ideally, I only want all the int values from the request body
you can simply do the following:
final String json = "{"arr": [99, [2, 4, ], [[55]], 0]}";
final String regularExpression = "([^\d])+";
Pattern pattern = Pattern.compile(regularExpression);
String results = pattern.split(json);
List<Integer> numbers = new ArrayList<>();
for (String result : results) {
try {
numbers.add(Integer.valueOf(result));
} catch (NumberFormatException e) {
}
}
for (int number : numbers) {
System.out.println(number);
}
This would output:
99
2
4
55
0
But this really doesn't give a damn about this being a json. It's just extracting numbers from a string.
answered Jan 3 at 12:10
maio290maio290
2,122615
If you really mean that:
ideally, I only want all the int values from the request body
you can simply do the following:
final String json = "{"arr": [99, [2, 4, ], [[55]], 0]}";
final String regularExpression = "([^\d])+";
Pattern pattern = Pattern.compile(regularExpression);
String results = pattern.split(json);
List<Integer> numbers = new ArrayList<>();
for (String result : results) {
try {
numbers.add(Integer.valueOf(result));
} catch (NumberFormatException e) {
}
}
for (int number : numbers) {
System.out.println(number);
}
This would output:
99
2
4
55
0
But this really doesn't give a damn about this being a json. It's just extracting numbers from a string.
answered Jan 3 at 12:10
maio290maio290
2,122615
answered Jan 3 at 12:10
maio290maio290
2,122615
answered Jan 3 at 12:10
maio290maio290
2,122615
answered Jan 3 at 12:10
maio290maio290
2,122615
2,122615
add a comment |
add a comment |
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This json should actually run into an exception/error. This is just not correct json and it's no wonder that it will cause a parser to fail.
– maio290
Jan 3 at 11:22
@maio290 okay. that's not really helpful. I'm trying to create a json request with an empty/missing value. So I'm also not surprised that it fails, but I'm looking for another solution, like doing something before parsing.
– krankit
Jan 3 at 11:40
You cannot use
routingContext.getBodyAsJson();if its not a valid json this will throw an exception. UseroutingContext.getBodyAsString()and parse that string as you wish.– taygetos
Jan 5 at 13:41