Comments (6)
oharaandrew314
commented on June 3, 2024
1
Ok, it obviously is wrong to serialize an object to a plain string. I'll close and re-open with the real problem.
from klaxon.
cbeust
commented on June 3, 2024
Your toJson function needs to surround its result with braces.
…On Jan 16, 2018 8:05 AM, "oharaandrew314" ***@***.***> wrote:
In Klaxon 2.0.10:
- If an object serializes to a string, it cannot be deserialized
- cannot deserialize a list of strings
/**
data class Person(val id: String, val firstName: String)
class PersonConverter: Converter {
override fun toJson(value: Person) = "${value.id}:${value.firstName}"
override fun fromJson(jv: JsonValue) = jv.string?.let {
val (id, firstName) = it.split(":")
Person(id, firstName)
} ?: throw KlaxonException("Invalid Person: $jv")
}
* com.beust.klaxon.KlaxonException: No state found: IN_ARRAY COLON
at com.beust.klaxon.StateMachine.next(StateMachine.kt:22)
at com.beust.klaxon.Parser.fullParseLoop(Parser.kt:59)
at com.beust.klaxon.Parser.parse(Parser.kt:29)
at com.prontoforms.pcns.auth.authorizer.MethodArnUnitTest.deserializeStringListToObject(MethodArnUnitTest.kt:66)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
*/
@test
fun deserializeStringListToObjectList() {
val mapper = Klaxon().converter(PersonConverter())
val obj = listOf(Person("1", "John"))
val jv = mapper.toJsonString(obj)
Assert.assertThat(jv, CoreMatchers.equalTo("[1:John]")) // Passes
Assert.assertThat(mapper.parse(jv), CoreMatchers.equalTo(obj)) // Fails
}
/**
* com.beust.klaxon.KlaxonException: No state found: IN_FINISHED_VALUE COLON
at com.beust.klaxon.StateMachine.next(StateMachine.kt:22)
at com.beust.klaxon.Parser.fullParseLoop(Parser.kt:59)
at com.beust.klaxon.Parser.parse(Parser.kt:29)
at com.prontoforms.pcns.auth.authorizer.MethodArnUnitTest.deserializeStringToObject(MethodArnUnitTest.kt:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
*/
@test
fun deserializeStringToObject() {
val mapper = Klaxon().converter(PersonConverter())
val obj = Person("1", "John")
val jv = mapper.toJsonString(obj)
Assert.assertThat(jv, CoreMatchers.equalTo("1:John")) // Passes
Assert.assertThat(mapper.parse(jv), CoreMatchers.equalTo(obj)) // Fails
}
/**
* java.lang.ClassCastException: com.beust.klaxon.JsonArray cannot be cast to com.beust.klaxon.JsonObject
at com.prontoforms.pcns.auth.authorizer.MethodArnUnitTest.deserializeRawStringList(MethodArnUnitTest.kt:142)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
*/
@test
fun deserializeStringListToStringList() {
val obj = listOf("foo", "bar", "baz")
val mapper = Klaxon()
val jv = mapper.toJsonString(obj)
Assert.assertThat(jv, CoreMatchers.equalTo("[\"foo\", \"bar\", \"baz\"]")) // Passes
Assert.assertThat(mapper.parse(jv), CoreMatchers.equalTo(obj)) // Fails
}
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oharaandrew314
commented on June 3, 2024
So, is it invalid to have a structure of
val people = listOf(person1, person2)
serialize to
["1:John", "2:Jane"]
?
from klaxon.
cbeust
commented on June 3, 2024
Correct, that's invalid JSON.
…On Jan 16, 2018 8:20 AM, "oharaandrew314" ***@***.***> wrote:
So, is it invalid to have a structure of
val people = listOf(person1, person2)
serialize to
["1:John", "2:Jane"]
?
I recall being able to do this in python just fine.
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oharaandrew314
commented on June 3, 2024
According to jsonlint.com it's fine. The standard on json.org doesn't explicitly state it to be invalid.
from klaxon.
oharaandrew314
commented on June 3, 2024
There was indeed a mistake in my serializer. I needed to surround the result in quotes. I now no longer get parsing exceptions, but I still get cast exceptions. It seems that your converter only allows json objects to be at the root of a document, when, in reality, a json array can be a valid start of the document.
from klaxon.
Related Issues (20)
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- A
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