JsonParser is using a self instantiated ObjectMapper, allow usage of a custom ObjectMapper instance

[brunorabaca]

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Bug description When calling a tool, is invoked the JsonParser.OBJECT_MAPPER to extract tool arguments. But when the json has '\n' characters the follow exception is thrown

com.fasterxml.jackson.core.JsonParseException: Illegal unquoted character ((CTRL-CHAR, code 10)): has to be escaped using backslash to be included in string value at [Source: REDACTED (StreamReadFeature.INCLUDE_SOURCE_IN_LOCATIONdisabled); line: 1, column: 191] at com.fasterxml.jackson.core.JsonParser._constructReadException(JsonParser.java:2660) ~[jackson-core-2.18.2.jar:2.18.2] at com.fasterxml.jackson.core.base.ParserBase._throwUnquotedSpace(ParserBase.java:1409) ~[jackson-core-2.18.2.jar:2.18.2] at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._finishString2(ReaderBasedJsonParser.java:2202) ~[jackson-core-2.18.2.jar:2.18.2] at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._finishString(ReaderBasedJsonParser.java:2173) ~[jackson-core-2.18.2.jar:2.18.2] at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.getText(ReaderBasedJsonParser.java:295) ~[jackson-core-2.18.2.jar:2.18.2] at com.fasterxml.jackson.databind.deser.std.UntypedObjectDeserializerNR.deserialize(UntypedObjectDeserializerNR.java:82) ~[jackson-databind-2.18.2.jar:2.18.2] at com.fasterxml.jackson.databind.deser.std.MapDeserializer._readAndBindStringKeyMap(MapDeserializer.java:623) ~[jackson-databind-2.18.2.jar:2.18.2] at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:449) ~[jackson-databind-2.18.2.jar:2.18.2] at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:32) ~[jackson-databind-2.18.2.jar:2.18.2] at com.fasterxml.jackson.databind.deser.DefaultDeserializationContext.readRootValue(DefaultDeserializationContext.java:342) ~[jackson-databind-2.18.2.jar:2.18.2] at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4917) ~[jackson-databind-2.18.2.jar:2.18.2] at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3860) ~[jackson-databind-2.18.2.jar:2.18.2] at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3843) ~[jackson-databind-2.18.2.jar:2.18.2] at org.springframework.ai.util.json.JsonParser.fromJson(JsonParser.java:92) ~[spring-ai-core-1.0.0-M6.jar:1.0.0-M6] at org.springframework.ai.tool.method.MethodToolCallback.extractToolArguments(MethodToolCallback.java:127) ~[spring-ai-core-1.0.0-M6.jar:1.0.0-M6]

Environment Spring boot: 3.4.3 Spring ai: 1.0.0-M6

Steps to reproduce Invoke any tool with a '\n' character on any text parameter

Expected behavior Allow JsonParser to use a custom ObjectMapper instance, so it`s possible to configure jackson parameters for Serialization and Deserialization features.

Minimal Complete Reproducible example ` import org.springframework.ai.tool.annotation.Tool; import org.springframework.ai.tool.annotation.ToolParam;

public class TestTools {

@Tool(description = "Find a textbook citation by the given text")
public String findCitation(
        @ToolParam(description = "Text") String text) {
    //...
    return "Something";
}

} `