Add multiple validators to Parameters (#77073) (#77091)

This PR implements support for multiple validators to a FieldMapper.Parameter.

The Parameter#setValidator method was replaced by Parameter#addValidator that can be called multipled times
to add validation to a parameter.

All validators of a parameter will be executed in the same order as they have been added and if any of them fails all validation will failed.

modules/mapper-extras/src/main/java/org/elasticsearch/index/mapper/ScaledFloatFieldMapper.java

@@ -72,7 +72,7 @@ public static class Builder extends FieldMapper.Builder {
 
         private final Parameter<Double> scalingFactor = new Parameter<>("scaling_factor", false, () -> null,
             (n, c, o) -> XContentMapValues.nodeDoubleValue(o), m -> toType(m).scalingFactor)
-            .setValidator(v -> {
+            .addValidator(v -> {
                 if (v == null) {
                     throw new IllegalArgumentException("Field [scaling_factor] is required");
                 }

modules/mapper-extras/src/main/java/org/elasticsearch/index/mapper/SearchAsYouTypeFieldMapper.java

@@ -97,7 +97,7 @@ public static class Builder extends FieldMapper.Builder {
         // `doc_values=false`, even though it cannot be set; and so we need to continue
         // serializing it forever because of mapper assertions in mixed clusters.
         private final Parameter<Boolean> docValues = Parameter.docValuesParam(m -> false, false)
-            .setValidator(v -> {
+            .addValidator(v -> {
                 if (v) {
                     throw new MapperParsingException("Cannot set [doc_values] on field of type [search_as_you_type]");
                 }
@@ -106,7 +106,7 @@ public static class Builder extends FieldMapper.Builder {
 
         private final Parameter<Integer> maxShingleSize = Parameter.intParam("max_shingle_size", false,
             m -> builder(m).maxShingleSize.get(), Defaults.MAX_SHINGLE_SIZE)
-            .setValidator(v -> {
+            .addValidator(v -> {
                 if (v < MAX_SHINGLE_SIZE_LOWER_BOUND || v > MAX_SHINGLE_SIZE_UPPER_BOUND) {
                     throw new MapperParsingException("[max_shingle_size] must be at least [" + MAX_SHINGLE_SIZE_LOWER_BOUND
                         + "] and at most " + "[" + MAX_SHINGLE_SIZE_UPPER_BOUND + "], got [" + v + "]");

plugins/analysis-icu/src/main/java/org/elasticsearch/index/mapper/ICUCollationKeywordFieldMapper.java

@@ -214,7 +214,7 @@ public static class Builder extends FieldMapper.Builder {
 
         final Parameter<Integer> ignoreAbove
             = Parameter.intParam("ignore_above", true, m -> toType(m).ignoreAbove, Integer.MAX_VALUE)
-            .setValidator(v -> {
+            .addValidator(v -> {
                 if (v < 0) {
                     throw new IllegalArgumentException("[ignore_above] must be positive, got [" + v + "]");
                 }

server/src/main/java/org/elasticsearch/index/mapper/CompletionFieldMapper.java

@@ -134,7 +134,7 @@ public static class Builder extends FieldMapper.Builder {
         private final Parameter<Integer> maxInputLength = Parameter.intParam("max_input_length", true,
             m -> builder(m).maxInputLength.get(), Defaults.DEFAULT_MAX_INPUT_LENGTH)
             .addDeprecatedName("max_input_len")
-            .setValidator(Builder::validateInputLength)
+            .addValidator(Builder::validateInputLength)
             .alwaysSerialize();
         private final Parameter<Map<String, String>> meta = Parameter.metaParam();
 

server/src/main/java/org/elasticsearch/index/mapper/CompositeRuntimeField.java

@@ -38,7 +38,7 @@ public class CompositeRuntimeField implements RuntimeField {
                 () -> null,
                 RuntimeField::parseScript,
                 RuntimeField.initializerNotSupported()
-            ).setValidator(s -> {
+            ).addValidator(s -> {
                 if (s == null) {
                     throw new IllegalArgumentException("composite runtime field [" + name + "] must declare a [script]");
                 }
@@ -50,7 +50,7 @@ public class CompositeRuntimeField implements RuntimeField {
                 Collections::emptyMap,
                 (f, p, o) -> parseFields(f, o),
                 RuntimeField.initializerNotSupported()
-            ).setValidator(objectMap -> {
+            ).addValidator(objectMap -> {
                 if (objectMap == null || objectMap.isEmpty()) {
                     throw new IllegalArgumentException("composite runtime field [" + name + "] must declare its [fields]");
                 }

server/src/main/java/org/elasticsearch/index/mapper/FieldMapper.java

@@ -587,7 +587,7 @@ public static final class Parameter<T> implements Supplier<T> {
         private final TriFunction<String, MappingParserContext, Object, T> parser;
         private final Function<FieldMapper, T> initializer;
         private boolean acceptsNull = false;
-        private Consumer<T> validator = null;
+        private List<Consumer<T>> validators = new ArrayList<>();
         private Serializer<T> serializer = XContentBuilder::field;
         private SerializerCheck<T> serializerCheck = (includeDefaults, isConfigured, value) -> includeDefaults || isConfigured;
         private Function<T, String> conflictSerializer = Objects::toString;
@@ -682,10 +682,11 @@ public Parameter<T> deprecated() {
         }
 
         /**
-         * Adds validation to a parameter, called after parsing and merging
+         * Adds validation to a parameter, called after parsing and merging. Multiple
+         * validators can be added and all of them will be executed.
          */
-        public Parameter<T> setValidator(Consumer<T> validator) {
-            this.validator = validator;
+        public Parameter<T> addValidator(Consumer<T> validator) {
+            this.validators.add(validator);
             return this;
         }
 
@@ -742,8 +743,9 @@ public Parameter<T> precludesParameters(Parameter<?>... ps) {
         }
 
         void validate() {
-            if (validator != null) {
-                validator.accept(getValue());
+            // Iterate over the list of validators and execute them one by one.
+            for (Consumer<T> v : validators) {
+                v.accept(getValue());
             }
             if (this.isConfigured()) {
                 for (Parameter<?> p : requires) {
@@ -894,7 +896,7 @@ public static Parameter<String> restrictedStringParam(String name, boolean updat
             assert values.length > 0;
             Set<String> acceptedValues = new LinkedHashSet<>(Arrays.asList(values));
             return stringParam(name, updateable, initializer, values[0])
-                .setValidator(v -> {
+                .addValidator(v -> {
                     if (acceptedValues.contains(v)) {
                         return;
                     }
@@ -1082,7 +1084,7 @@ protected void addScriptValidation(
             Parameter<Boolean> indexParam,
             Parameter<Boolean> docValuesParam
         ) {
-            scriptParam.setValidator(s -> {
+            scriptParam.addValidator(s -> {
                 if (s != null && indexParam.get() == false && docValuesParam.get() == false) {
                     throw new MapperParsingException("Cannot define script on field with index:false and doc_values:false");
                 }

server/src/main/java/org/elasticsearch/index/mapper/KeywordFieldMapper.java

@@ -537,5 +537,4 @@ public FieldMapper.Builder getMergeBuilder() {
         return new Builder(simpleName(), indexAnalyzers, scriptCompiler).init(this);
     }
 
-
 }

server/src/main/java/org/elasticsearch/index/mapper/LegacyGeoShapeFieldMapper.java

@@ -166,7 +166,7 @@ public Builder(String name, Version version, boolean ignoreMalformedByDefault, b
             this.ignoreMalformed = ignoreMalformedParam(m -> builder(m).ignoreMalformed.get(), ignoreMalformedByDefault);
             this.coerce = coerceParam(m -> builder(m).coerce.get(), coerceByDefault);
 
-            this.pointsOnly.setValidator(v -> {
+            this.pointsOnly.addValidator(v -> {
                 if (v == null) {
                     return;
                 }

server/src/main/java/org/elasticsearch/index/mapper/TextParams.java

@@ -41,7 +41,7 @@ public Analyzers(IndexAnalyzers indexAnalyzers,
                 m -> analyzerInitFunction.apply(m).indexAnalyzer.get(), indexAnalyzers::getDefaultIndexAnalyzer)
                 .setSerializerCheck((id, ic, a) -> id || ic ||
                     Objects.equals(a, getSearchAnalyzer()) == false || Objects.equals(a, getSearchQuoteAnalyzer()) == false)
-                .setValidator(a -> a.checkAllowedInMode(AnalysisMode.INDEX_TIME));
+                .addValidator(a -> a.checkAllowedInMode(AnalysisMode.INDEX_TIME));
             this.searchAnalyzer
                 = Parameter.analyzerParam("search_analyzer", true,
                 m -> m.fieldType().getTextSearchInfo().getSearchAnalyzer(), () -> {
@@ -54,7 +54,7 @@ public Analyzers(IndexAnalyzers indexAnalyzers,
                     return indexAnalyzer.get();
                 })
                 .setSerializerCheck((id, ic, a) -> id || ic || Objects.equals(a, getSearchQuoteAnalyzer()) == false)
-                .setValidator(a -> a.checkAllowedInMode(AnalysisMode.SEARCH_TIME));
+                .addValidator(a -> a.checkAllowedInMode(AnalysisMode.SEARCH_TIME));
             this.searchQuoteAnalyzer
                 = Parameter.analyzerParam("search_quote_analyzer", true,
                 m -> m.fieldType().getTextSearchInfo().getSearchQuoteAnalyzer(), () -> {
@@ -66,10 +66,10 @@ public Analyzers(IndexAnalyzers indexAnalyzers,
                     }
                     return searchAnalyzer.get();
                 })
-                .setValidator(a -> a.checkAllowedInMode(AnalysisMode.SEARCH_TIME));
+                .addValidator(a -> a.checkAllowedInMode(AnalysisMode.SEARCH_TIME));
             this.positionIncrementGap = Parameter.intParam("position_increment_gap", false,
                 m -> analyzerInitFunction.apply(m).positionIncrementGap.get(), TextFieldMapper.Defaults.POSITION_INCREMENT_GAP)
-                .setValidator(v -> {
+                .addValidator(v -> {
                     if (v < 0) {
                         throw new MapperParsingException("[position_increment_gap] must be positive, got [" + v + "]");
                     }

server/src/main/java/org/elasticsearch/index/mapper/flattened/FlattenedFieldMapper.java

@@ -114,7 +114,7 @@ public static class Builder extends FieldMapper.Builder {
 
         final Parameter<Integer> depthLimit
             = Parameter.intParam("depth_limit", true, m -> builder(m).depthLimit.get(), Defaults.DEPTH_LIMIT)
-            .setValidator(v -> {
+            .addValidator(v -> {
                 if (v < 0) {
                     throw new IllegalArgumentException("[depth_limit] must be positive, got [" + v + "]");
                 }

server/src/test/java/org/elasticsearch/index/mapper/ParametrizedMapperTests.java

@@ -95,19 +95,24 @@ public static class Builder extends FieldMapper.Builder {
                 },
             m -> toType(m).wrapper).setSerializer((b, n, v) -> b.field(n, v.name), v -> "wrapper_" + v.name);
         final Parameter<Integer> intValue = Parameter.intParam("int_value", true, m -> toType(m).intValue, 5)
-            .setValidator(n -> {
+            .addValidator(n -> {
                 if (n > 50) {
                     throw new IllegalArgumentException("Value of [n] cannot be greater than 50");
                 }
             })
+            .addValidator(n -> {
+                if (n < 0) {
+                    throw new IllegalArgumentException("Value of [n] cannot be less than 0");
+                }
+            })
             .setMergeValidator((o, n, c) -> n >= o);
         final Parameter<NamedAnalyzer> analyzer
             = Parameter.analyzerParam("analyzer", false, m -> toType(m).analyzer, () -> Lucene.KEYWORD_ANALYZER);
         final Parameter<NamedAnalyzer> searchAnalyzer
             = Parameter.analyzerParam("search_analyzer", true, m -> toType(m).searchAnalyzer, analyzer::getValue);
         final Parameter<Boolean> index = Parameter.boolParam("index", false, m -> toType(m).index, true);
         final Parameter<String> required = Parameter.stringParam("required", true, m -> toType(m).required, null)
-            .setValidator(value -> {
+            .addValidator(value -> {
                 if (value == null) {
                     throw new IllegalArgumentException("field [required] must be specified");
                 }
@@ -370,6 +375,10 @@ public void testParameterValidation() {
         IllegalArgumentException e = expectThrows(IllegalArgumentException.class,
             () -> fromMapping("{\"type\":\"test_mapper\",\"int_value\":60,\"required\":\"value\"}"));
         assertEquals("Value of [n] cannot be greater than 50", e.getMessage());
+
+        IllegalArgumentException e2 = expectThrows(IllegalArgumentException.class,
+            () -> fromMapping("{\"type\":\"test_mapper\",\"int_value\":-60,\"required\":\"value\"}"));
+        assertEquals("Value of [n] cannot be less than 0", e2.getMessage());
     }
 
     // test deprecations

x-pack/plugin/mapper-aggregate-metric/src/main/java/org/elasticsearch/xpack/aggregatemetric/mapper/AggregateDoubleMetricFieldMapper.java

@@ -124,7 +124,7 @@ public static class Builder extends FieldMapper.Builder {
                 }
             }
             return parsedMetrics;
-        }, m -> toType(m).metrics).setValidator(v -> {
+        }, m -> toType(m).metrics).addValidator(v -> {
             if (v == null || v.isEmpty()) {
                 throw new IllegalArgumentException("Property [" + Names.METRICS + "] is required for field [" + name() + "].");
             }

x-pack/plugin/vectors/src/main/java/org/elasticsearch/xpack/vectors/mapper/DenseVectorFieldMapper.java

@@ -56,7 +56,7 @@ public static class Builder extends FieldMapper.Builder {
 
         Parameter<Integer> dims
             = new Parameter<>("dims", false, () -> null, (n, c, o) -> XContentMapValues.nodeIntegerValue(o), m -> toType(m).dims)
-            .setValidator(dims -> {
+            .addValidator(dims -> {
                 if (dims == null) {
                     throw new MapperParsingException("Missing required parameter [dims] for field [" + name + "]");
                 }

x-pack/plugin/wildcard/src/main/java/org/elasticsearch/xpack/wildcard/mapper/WildcardFieldMapper.java

@@ -193,7 +193,7 @@ public static class Builder extends FieldMapper.Builder {
 
         final Parameter<Integer> ignoreAbove
             = Parameter.intParam("ignore_above", true, m -> toType(m).ignoreAbove, Defaults.IGNORE_ABOVE)
-            .setValidator(v -> {
+            .addValidator(v -> {
                 if (v < 0) {
                     throw new IllegalArgumentException("[ignore_above] must be positive, got [" + v + "]");
                 }
@@ -333,7 +333,7 @@ public Query wildcardQuery(String wildcardPattern, RewriteMethod method, boolean
             if (clauseCount > 0) {
                 // We can accelerate execution with the ngram query
                 BooleanQuery approxQuery = rewritten.build();
-                return new BinaryDvConfirmedAutomatonQuery(approxQuery, name(), wildcardPattern, automaton);                
+                return new BinaryDvConfirmedAutomatonQuery(approxQuery, name(), wildcardPattern, automaton);
             } else if (numWildcardChars == 0 || numWildcardStrings > 0) {
                 // We have no concrete characters and we're not a pure length query e.g. ???
                 return new DocValuesFieldExistsQuery(name());
@@ -365,11 +365,11 @@ public Query regexpQuery(String value, int syntaxFlags, int matchFlags, int maxD
             // MatchAllButRequireVerificationQuery is a special case meaning the regex is reduced to a single
             // clause which we can't accelerate at all and needs verification. Example would be ".."
             if (approxNgramQuery instanceof MatchAllButRequireVerificationQuery) {
-                return new BinaryDvConfirmedAutomatonQuery(new MatchAllDocsQuery(), name(), value, automaton);            
+                return new BinaryDvConfirmedAutomatonQuery(new MatchAllDocsQuery(), name(), value, automaton);
             }
 
             // We can accelerate execution with the ngram query
-            return new BinaryDvConfirmedAutomatonQuery(approxNgramQuery, name(), value, automaton);            
+            return new BinaryDvConfirmedAutomatonQuery(approxNgramQuery, name(), value, automaton);
         }
 
         // Convert a regular expression to a simplified query consisting of BooleanQuery and TermQuery objects
@@ -740,9 +740,9 @@ public Query rangeQuery(
 
             if (accelerationQuery == null) {
                 return new BinaryDvConfirmedAutomatonQuery(new MatchAllDocsQuery(),
-                    name(), lower + "-" + upper, automaton);            
+                    name(), lower + "-" + upper, automaton);
             }
-            return new BinaryDvConfirmedAutomatonQuery(accelerationQuery, name(), lower + "-" + upper, automaton);            
+            return new BinaryDvConfirmedAutomatonQuery(accelerationQuery, name(), lower + "-" + upper, automaton);
         }
 
         @Override
@@ -822,10 +822,10 @@ public Query fuzzyQuery(
                 );
                 if (ngramQ.clauses().size() == 0) {
                     return new BinaryDvConfirmedAutomatonQuery(new MatchAllDocsQuery(),
-                        name(), searchTerm, fq.getAutomata().automaton);            
+                        name(), searchTerm, fq.getAutomata().automaton);
                 }
 
-                return new BinaryDvConfirmedAutomatonQuery(ngramQ, name(), searchTerm, fq.getAutomata().automaton);            
+                return new BinaryDvConfirmedAutomatonQuery(ngramQ, name(), searchTerm, fq.getAutomata().automaton);
             } catch (IOException ioe) {
                 throw new ElasticsearchParseException("Error parsing wildcard field fuzzy string [" + searchTerm + "]");
             }