Filter upgrades to support kw params

src/main/java/com/hubspot/jinjava/el/TruthyTypeConverter.java

@@ -89,10 +89,16 @@ protected Byte coerceToByte(Object value) {
 
   @Override
   protected String coerceToString(Object value) {
-    if (value instanceof DummyObject) {
+    if (value instanceof DummyObject || value == null) {
       return "";
     }
-    return super.coerceToString(value);
+
+    // super() behavior breaks equality between enums and strings so removed here.
+    if (value instanceof String) {
+      return (String) value;
+    }
+
+    return value.toString();
   }
 
   @Override

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

@@ -19,6 +19,7 @@
 import com.google.common.collect.ImmutableMap;
 import com.hubspot.jinjava.doc.annotations.JinjavaDoc;
 import com.hubspot.jinjava.doc.annotations.JinjavaParam;
+import com.hubspot.jinjava.el.TruthyTypeConverter;
 import com.hubspot.jinjava.interpret.InvalidInputException;
 import com.hubspot.jinjava.interpret.JinjavaInterpreter;
 import java.math.BigDecimal;
@@ -27,12 +28,9 @@
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.Objects;
 import java.util.Optional;
 import java.util.concurrent.ConcurrentHashMap;
-import org.apache.commons.lang3.BooleanUtils;
 import org.apache.commons.lang3.StringUtils;
-import org.apache.commons.lang3.math.NumberUtils;
 
 /***
  * Filter base that uses Filter Jinjavadoc to construct named argument parameters.
@@ -41,9 +39,10 @@
  * @see JinjavaDoc
  * @see JinjavaParam
  */
-public abstract class AbstractFilter implements Filter {
+public abstract class AbstractFilter implements Filter, AdvancedFilter {
   private static final Map<Class, Map<String, JinjavaParam>> NAMED_ARGUMENTS_CACHE = new ConcurrentHashMap<>();
   private static final Map<Class, Map<String, Object>> DEFAULT_VALUES_CACHE = new ConcurrentHashMap<>();
+  protected static final TruthyTypeConverter TYPE_CONVERTER = new TruthyTypeConverter();
 
   private final Map<String, JinjavaParam> namedArguments;
   private final Map<String, Object> defaultValues;
@@ -124,46 +123,40 @@ protected Object parseArg(
     JinjavaParam jinjavaParamMetadata,
     Object value
   ) {
-    if (
-      jinjavaParamMetadata.type() == null ||
-      value == null ||
-      Arrays.asList("object", "dict", "sequence").contains(jinjavaParamMetadata.type())
-    ) {
+    if (jinjavaParamMetadata.type() == null || value == null) {
       return value;
     }
-    String valueString = Objects.toString(value, null);
     switch (jinjavaParamMetadata.type().toLowerCase()) {
       case "boolean":
-        return value instanceof Boolean
-          ? (Boolean) value
-          : BooleanUtils.toBooleanObject(valueString);
+        return TYPE_CONVERTER.convert(value, Boolean.class);
       case "int":
-        return value instanceof Integer
-          ? (Integer) value
-          : NumberUtils.toInt(valueString);
+        return TYPE_CONVERTER.convert(value, Integer.class);
       case "long":
-        return value instanceof Long ? (Long) value : NumberUtils.toLong(valueString);
+        return TYPE_CONVERTER.convert(value, Long.class);
       case "float":
-        return value instanceof Float ? (Float) value : NumberUtils.toFloat(valueString);
+        return TYPE_CONVERTER.convert(value, Float.class);
       case "double":
-        return value instanceof Double
-          ? (Double) value
-          : NumberUtils.toDouble(valueString);
+        return TYPE_CONVERTER.convert(value, Double.class);
       case "number":
-        return value instanceof Number ? (Number) value : new BigDecimal(valueString);
+        return TYPE_CONVERTER.convert(value, BigDecimal.class);
       case "string":
-        return valueString;
+        return TYPE_CONVERTER.convert(value, String.class);
+      case "object":
+      case "dict":
+      case "sequence":
+        return value;
       default:
-        throw new InvalidInputException(
-          interpreter,
-          "INVALID_ARG_NAME",
-          String.format(
-            "Argument named '%s' with value '%s' cannot be parsed for filter %s",
-            jinjavaParamMetadata.value(),
-            value,
-            getName()
-          )
+        String errorMessage = String.format(
+          "Argument named '%s' with value '%s' cannot be parsed for filter '%s'",
+          jinjavaParamMetadata.value(),
+          value,
+          getName()
         );
+        if (interpreter != null) { //Filter runtime vs init
+          throw new InvalidInputException(interpreter, "INVALID_ARG_NAME", errorMessage);
+        } else {
+          throw new IllegalArgumentException(errorMessage);
+        }
     }
   }
 
@@ -172,7 +165,13 @@ public void validateArgs(
     Map<String, Object> parsedArgs
   ) {
     for (JinjavaParam jinjavaParam : namedArguments.values()) {
-      if (jinjavaParam.required() && !parsedArgs.containsKey(jinjavaParam.value())) {
+      if (
+        jinjavaParam.required() &&
+        (
+          !parsedArgs.containsKey(jinjavaParam.value()) ||
+          parsedArgs.get(jinjavaParam.value()) == null
+        )
+      ) {
         throw new InvalidInputException(
           interpreter,
           "MISSING_REQUIRED_ARG",
@@ -207,6 +206,10 @@ public String getIndexedArgumentName(int position) {
       .orElse(null);
   }
 
+  public Object getDefaultValue(String argName) {
+    return defaultValues.get(argName);
+  }
+
   public Map<String, JinjavaParam> initNamedArguments() {
     JinjavaDoc jinjavaDoc = this.getClass().getAnnotation(JinjavaDoc.class);
 
@@ -242,7 +245,10 @@ public Map<String, Object> initDefaultValues() {
       .stream()
       .filter(e -> StringUtils.isNotEmpty(e.getValue().defaultValue()))
       .collect(
-        ImmutableMap.toImmutableMap(Map.Entry::getKey, e -> e.getValue().defaultValue())
+        ImmutableMap.toImmutableMap(
+          Map.Entry::getKey,
+          e -> parseArg(null, e.getValue(), e.getValue().defaultValue())
+        )
       );
   }
 }

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

@@ -6,6 +6,7 @@
 import com.hubspot.jinjava.interpret.JinjavaInterpreter;
 import com.hubspot.jinjava.lib.fn.Functions;
 import com.hubspot.jinjava.objects.date.StrftimeFormatter;
+import java.util.Map;
 
 @JinjavaDoc(
   value = "Formats a date object",
@@ -17,19 +18,19 @@
   ),
   params = {
     @JinjavaParam(
-      value = "format",
+      value = DateTimeFormatFilter.FORMAT_PARAM,
       defaultValue = StrftimeFormatter.DEFAULT_DATE_FORMAT,
       desc = "The format of the date determined by the directives added to this parameter"
     ),
     @JinjavaParam(
-      value = "timezone",
-      defaultValue = "utc",
+      value = DateTimeFormatFilter.TIMEZONE_PARAM,
+      defaultValue = "UTC",
       desc = "Time zone of output date"
     ),
     @JinjavaParam(
-      value = "locale",
+      value = DateTimeFormatFilter.LOCALE_PARAM,
       type = "string",
-      defaultValue = "us",
+      defaultValue = "en-US",
       desc = "The language code to use when formatting the datetime"
     )
   },
@@ -40,19 +41,29 @@
     )
   }
 )
-public class DateTimeFormatFilter implements Filter {
+public class DateTimeFormatFilter extends AbstractFilter implements Filter {
+  public static final String FORMAT_PARAM = "format";
+  public static final String TIMEZONE_PARAM = "timezone";
+  public static final String LOCALE_PARAM = "locale";
 
   @Override
   public String getName() {
     return "datetimeformat";
   }
 
   @Override
-  public Object filter(Object var, JinjavaInterpreter interpreter, String... args) {
-    if (args.length > 0) {
-      return Functions.dateTimeFormat(var, args);
-    } else {
+  public Object filter(
+    Object var,
+    JinjavaInterpreter interpreter,
+    Map<String, Object> parsedArgs
+  ) {
+    String format = (String) parsedArgs.get(FORMAT_PARAM);
+    String timezone = (String) parsedArgs.get(TIMEZONE_PARAM);
+    String locale = (String) parsedArgs.get(LOCALE_PARAM);
+    if (format == null && timezone == null && locale == null) {
       return Functions.dateTimeFormat(var);
+    } else {
+      return Functions.dateTimeFormat(var, format, timezone, locale);
     }
   }
 }

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

@@ -12,19 +12,20 @@
 import com.hubspot.jinjava.util.ForLoop;
 import com.hubspot.jinjava.util.LengthLimitingStringBuilder;
 import com.hubspot.jinjava.util.ObjectIterator;
+import java.util.Map;
 import java.util.Objects;
 
 @JinjavaDoc(
   value = "Return a string which is the concatenation of the strings in the sequence.",
   input = @JinjavaParam(value = "value", desc = "The values to join", required = true),
   params = {
     @JinjavaParam(
-      value = "d",
+      value = JoinFilter.SEPARATOR_PARAM,
       desc = "The separator string used to join the items",
       defaultValue = "(empty String)"
     ),
     @JinjavaParam(
-      value = "attr",
+      value = JoinFilter.ATTRIBUTE_PARAM,
       desc = "Optional dict object attribute to use in joining"
     )
   },
@@ -37,28 +38,28 @@
     )
   }
 )
-public class JoinFilter implements Filter {
+public class JoinFilter extends AbstractFilter implements Filter {
+  public static final String SEPARATOR_PARAM = "d";
+  public static final String ATTRIBUTE_PARAM = "attribute";
 
   @Override
   public String getName() {
     return "join";
   }
 
   @Override
-  public Object filter(Object var, JinjavaInterpreter interpreter, String... args) {
+  public Object filter(
+    Object var,
+    JinjavaInterpreter interpreter,
+    Map<String, Object> parsedArgs
+  ) {
     LengthLimitingStringBuilder stringBuilder = new LengthLimitingStringBuilder(
       interpreter.getConfig().getMaxStringLength()
     );
 
-    String separator = "";
-    if (args.length > 0) {
-      separator = args[0];
-    }
+    String separator = (String) parsedArgs.get(SEPARATOR_PARAM);
 
-    String attr = null;
-    if (args.length > 1) {
-      attr = args[1];
-    }
+    String attr = (String) parsedArgs.get(ATTRIBUTE_PARAM);
 
     ForLoop loop = ObjectIterator.getLoop(var);
     boolean first = true;

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

@@ -10,7 +10,7 @@
 import com.hubspot.jinjava.interpret.InvalidInputException;
 import com.hubspot.jinjava.interpret.InvalidReason;
 import com.hubspot.jinjava.interpret.JinjavaInterpreter;
-import com.hubspot.jinjava.interpret.TemplateSyntaxException;
+import java.util.Map;
 
 @JinjavaDoc(
   value = "Return a copy of the value with all occurrences of a matched regular expression (Java RE2 syntax) " +
@@ -23,12 +23,12 @@
   ),
   params = {
     @JinjavaParam(
-      value = "regex",
+      value = RegexReplaceFilter.REGEX_KEY,
       desc = "The regular expression that you want to match and replace",
       required = true
     ),
     @JinjavaParam(
-      value = "new",
+      value = RegexReplaceFilter.REPLACE_WITH,
       desc = "The new string that you replace the matched substring",
       required = true
     )
@@ -40,39 +40,29 @@
     )
   }
 )
-public class RegexReplaceFilter implements Filter {
+public class RegexReplaceFilter extends AbstractFilter {
+  public static final String REGEX_KEY = "regex";
+  public static final String REPLACE_WITH = "new";
 
   @Override
   public String getName() {
     return "regex_replace";
   }
 
   @Override
-  public Object filter(Object var, JinjavaInterpreter interpreter, String... args) {
-    if (args.length < 2) {
-      throw new TemplateSyntaxException(
-        interpreter,
-        getName(),
-        "requires 2 arguments (regex string, replacement string)"
-      );
-    }
-
-    if (args[0] == null || args[1] == null) {
-      throw new TemplateSyntaxException(
-        interpreter,
-        getName(),
-        "requires both a valid regex and new params (not null)"
-      );
-    }
-
+  public Object filter(
+    Object var,
+    JinjavaInterpreter interpreter,
+    Map<String, Object> parsedArgs
+  ) {
     if (var == null) {
       return null;
     }
 
     if (var instanceof String) {
       String s = (String) var;
-      String toReplace = args[0];
-      String replaceWith = args[1];
+      String toReplace = (String) parsedArgs.get(REGEX_KEY);
+      String replaceWith = (String) parsedArgs.get(REPLACE_WITH);
 
       try {
         Pattern p = Pattern.compile(toReplace);