Make ObjectMapper configurable via JinjavaConfig

src/main/java/com/hubspot/jinjava/JinjavaConfig.java

@@ -17,6 +17,7 @@
 
 import static com.hubspot.jinjava.lib.fn.Functions.DEFAULT_RANGE_LIMIT;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
 import com.hubspot.jinjava.el.JinjavaInterpreterResolver;
 import com.hubspot.jinjava.interpret.Context;
 import com.hubspot.jinjava.interpret.Context.Library;
@@ -66,6 +67,7 @@ public class JinjavaConfig {
   private final ExecutionMode executionMode;
   private final LegacyOverrides legacyOverrides;
   private final boolean enablePreciseDivideFilter;
+  private final ObjectMapper objectMapper;
 
   public static Builder newBuilder() {
     return new Builder();
@@ -120,6 +122,7 @@ private JinjavaConfig(Builder builder) {
     executionMode = builder.executionMode;
     legacyOverrides = builder.legacyOverrides;
     enablePreciseDivideFilter = builder.enablePreciseDivideFilter;
+    objectMapper = builder.objectMapper;
   }
 
   public Charset getCharset() {
@@ -214,6 +217,10 @@ public ELResolver getElResolver() {
     return elResolver;
   }
 
+  public ObjectMapper getObjectMapper() {
+    return objectMapper;
+  }
+
   /**
    * @deprecated  Replaced by {@link LegacyOverrides#isIterateOverMapKeys()}
    */
@@ -263,6 +270,7 @@ public static class Builder {
     private ExecutionMode executionMode = DefaultExecutionMode.instance();
     private LegacyOverrides legacyOverrides = LegacyOverrides.NONE;
     private boolean enablePreciseDivideFilter = false;
+    private ObjectMapper objectMapper = new ObjectMapper();
 
     private Builder() {}
 
@@ -414,6 +422,11 @@ public Builder withEnablePreciseDivideFilter(boolean enablePreciseDivideFilter)
       return this;
     }
 
+    public Builder withObjectMapper(ObjectMapper objectMapper) {
+      this.objectMapper = objectMapper;
+      return this;
+    }
+
     public JinjavaConfig build() {
       return new JinjavaConfig(this);
     }

src/main/java/com/hubspot/jinjava/lib/filter/ToJsonFilter.java

@@ -1,7 +1,6 @@
 package com.hubspot.jinjava.lib.filter;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
 import com.hubspot.jinjava.doc.annotations.JinjavaDoc;
 import com.hubspot.jinjava.doc.annotations.JinjavaParam;
 import com.hubspot.jinjava.doc.annotations.JinjavaSnippet;
@@ -19,12 +18,11 @@
   snippets = { @JinjavaSnippet(code = "{{object|tojson}}") }
 )
 public class ToJsonFilter implements Filter {
-  private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
 
   @Override
   public Object filter(Object var, JinjavaInterpreter interpreter, String... args) {
     try {
-      return OBJECT_MAPPER.writeValueAsString(var);
+      return interpreter.getConfig().getObjectMapper().writeValueAsString(var);
     } catch (JsonProcessingException e) {
       throw new InvalidInputException(interpreter, this, InvalidReason.JSON_WRITE);
     }