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Library throws ClassCastException in AbstractJsonProvider.toList() #24

Closed GoogleCodeExporter closed 8 years ago

GoogleCodeExporter commented 8 years ago 
What steps will reproduce the problem?
1. JsonPath: $.project[?(@.template.@key == 'foo')].field[*].@key
2. Json Object: (lengthy, see attachment)
3. List<String> fields = JsonPath.read(jsonData, jsonPath);

What is the expected output? What do you see instead?

Should return a List<String> which contains all the "@key" field values of the 
"field" substructure ("Artist", ...) , but throws ClassCastException instead.

What version of the product are you using? On what operating system?

V. 0.8.0 on Win7 64 bit / Java 6 / Tomcat 6.

Please provide any additional information below.

java.lang.ClassCastException: net.minidev.json.JSONObject cannot be cast to 
java.util.List
    at com.jayway.jsonpath.spi.impl.AbstractJsonProvider.toList(AbstractJsonProvider.java:55)
    at com.jayway.jsonpath.internal.filter.ArrayEvalFilter.filter(ArrayEvalFilter.java:40)
    at com.jayway.jsonpath.internal.filter.PathTokenFilter.filter(PathTokenFilter.java:50)
    at com.jayway.jsonpath.JsonPath.read(JsonPath.java:182)
    at com.jayway.jsonpath.JsonPath.read(JsonPath.java:202)
    at com.jayway.jsonpath.JsonPath.read(JsonPath.java:307)

Original issue reported on code.google.com by matthias...@zeutschel.de on 9 Jan 2013 at 7:36

Attachments:

GoogleCodeExporter commented 8 years ago 
[deleted comment]
GoogleCodeExporter commented 8 years ago 
Not very helpful stack trace. This is fixed in version 0.9, soon to be 
released. 

New stack trace:

com.jayway.jsonpath.InvalidPathException: The path fragment '[?(@.template.@key 
=='foo')]' can not be applied to a JSON object only a JSON array.
    at com.jayway.jsonpath.internal.filter.ArrayEvalFilter.filter(ArrayEvalFilter.java:56)
...

The main issue with your path is that you try to filter a JSON object 
$.projects (a Map) with a Array filter. 

Is there a typo in your sample json? If not try $.project.field[*].@key

Original comment by kalle.st...@gmail.com on 20 Aug 2013 at 10:56