Added support for multioutputs to ResponseProcesser, with tests.

Core/src/test/java/org/tribuo/test/MockMultiOutputFactory.java

@@ -16,6 +16,7 @@
 
 package org.tribuo.test;
 
+import com.oracle.labs.mlrg.olcut.provenance.Provenance;
 import com.oracle.labs.mlrg.olcut.util.Pair;
 import org.tribuo.ImmutableOutputInfo;
 import org.tribuo.MutableOutputInfo;
@@ -84,7 +85,7 @@ public boolean equals(Object obj) {
 
     @Override
     public OutputFactoryProvenance getProvenance() {
-        return null;
+        return new MockMultiOutputFactoryProvenance();
     }
 
     /**
@@ -163,4 +164,32 @@ public static MockMultiOutput createFromPairList(List<Pair<String,Boolean>> dime
         }
         return new MockMultiOutput(labels);
     }
+
+    public static class MockMultiOutputFactoryProvenance implements OutputFactoryProvenance {
+        private static final long serialVersionUID=1L;
+
+        MockMultiOutputFactoryProvenance() {}
+
+        public MockMultiOutputFactoryProvenance(Map<String, Provenance> map) {}
+
+        @Override
+        public String getClassName() {
+            return MockMultiOutputFactory.class.getName();
+        }
+
+        @Override
+        public String toString() {
+            return generateString("MockMultiOutputFactory");
+        }
+
+        @Override
+        public boolean equals(Object other) {
+            return other instanceof MockMultiOutputFactoryProvenance;
+        }
+
+        @Override
+        public int hashCode() {
+            return 32;
+        }
+    }
 }

Data/src/main/java/org/tribuo/data/columnar/ResponseProcessor.java

@@ -22,6 +22,7 @@
 import org.tribuo.Output;
 import org.tribuo.OutputFactory;
 
+import java.util.List;
 import java.util.Optional;
 
 /**
@@ -39,6 +40,7 @@ public interface ResponseProcessor<T extends Output<T>> extends Configurable, Pr
      * Gets the field name this ResponseProcessor uses.
      * @return The field name.
      */
+    @Deprecated
     public String getFieldName();
 
     /**
@@ -55,5 +57,25 @@ public interface ResponseProcessor<T extends Output<T>> extends Configurable, Pr
      * @param value The value to process.
      * @return The response value if found.
      */
+    @Deprecated()
     public Optional<T> process(String value);
+
+    /**
+     * Returns Optional.empty() if it failed to process out a response.
+     * @param values The value to process.
+     * @return The response values if found.
+     */
+    default Optional<T> process(List<String> values) {
+        if (values.size() != 1) {
+            throw new IllegalArgumentException(getClass().getSimpleName() + " does not implement support for multiple response values");
+        } else {
+            return process(values.get(0));
+        }
+    }
+
+    /**
+     * Gets the field names this ResponseProcessor uses.
+     * @return The field name.
+     */
+    List<String> getFieldNames();
 }

Data/src/main/java/org/tribuo/data/columnar/RowProcessor.java

@@ -289,8 +289,11 @@ public Set<FeatureProcessor> getFeatureProcessors() {
      * @return An Optional containing an Example if the row was valid, an empty Optional otherwise.
      */
     public Optional<Example<T>> generateExample(ColumnarIterator.Row row, boolean outputRequired) {
-        String responseValue = row.getRowData().get(responseProcessor.getFieldName());
-        Optional<T> labelOpt = responseProcessor.process(responseValue);
+
+        List<String> responseValues = responseProcessor.getFieldNames().stream()
+                .map(f -> row.getRowData().getOrDefault(f, ""))
+                .collect(Collectors.toList());
+        Optional<T> labelOpt = responseProcessor.process(responseValues);
         if (!labelOpt.isPresent() && outputRequired) {
             return Optional.empty();
         }

Data/src/main/java/org/tribuo/data/columnar/processors/response/BinaryResponseProcessor.java

@@ -17,12 +17,16 @@
 package org.tribuo.data.columnar.processors.response;
 
 import com.oracle.labs.mlrg.olcut.config.Config;
+import com.oracle.labs.mlrg.olcut.config.PropertyException;
 import com.oracle.labs.mlrg.olcut.provenance.ConfiguredObjectProvenance;
 import com.oracle.labs.mlrg.olcut.provenance.impl.ConfiguredObjectProvenanceImpl;
 import org.tribuo.Output;
 import org.tribuo.OutputFactory;
 import org.tribuo.data.columnar.ResponseProcessor;
 
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
 import java.util.Optional;
 
 /**
@@ -32,13 +36,14 @@
  */
 public class BinaryResponseProcessor<T extends Output<T>> implements ResponseProcessor<T> {
 
-    @Config(mandatory = true,description="The field name to read.")
+    @Config(description="The field name to read, you should use only one of this or fieldNames")
+    @Deprecated
     private String fieldName;
 
-    @Config(mandatory = true,description="The string which triggers a positive response.")
+    @Config(description="The string which triggers a positive response.")
     private String positiveResponse;
 
-    @Config(mandatory = true,description="Output factory to use to create the response.")
+    @Config(description="Output factory to use to create the response.")
     private OutputFactory<T> outputFactory;
 
     @Config(description="The positive response to emit.")
@@ -47,6 +52,36 @@ public class BinaryResponseProcessor<T extends Output<T>> implements ResponsePro
     @Config(description="The negative response to emit.")
     private String negativeName = "0";
 
+    @Config(description = "A list of field names to read, you should use only one of this or fieldName.")
+    private List<String> fieldNames;
+
+    @Config(description = "A list of strings that trigger positive responses; it should be the same length as fieldNames or empty")
+    private List<String> positiveResponses;
+
+    @Config(description = "Whether to display field names as part of the generated label, defaults to false")
+    private boolean displayField = false;
+
+
+    @Override
+    public void postConfig() {
+        if (fieldName != null && fieldNames != null) { // we can only have one path
+            throw new PropertyException("fieldName, FieldNames", "only one of fieldName or fieldNames can be populated");
+        } else if (fieldNames != null) {
+            positiveResponses = positiveResponses == null ? Collections.nCopies(fieldNames.size(), positiveResponse) : positiveResponses;
+            if(positiveResponses.size() != fieldNames.size()) {
+                throw new PropertyException("positiveResponses", "must either be empty or match the length of fieldNames");
+            }
+        } else if (fieldName != null)  {
+            if(positiveResponses != null) {
+                throw new PropertyException("positiveResponses", "if fieldName is populated, positiveResponses must be blank");
+            }
+            fieldNames = Collections.singletonList(fieldName);
+            positiveResponses = Collections.singletonList(positiveName);
+        } else {
+            throw new PropertyException("fieldName, fieldNames", "One of fieldName or fieldNames must be populated");
+        }
+    }
+
     /**
      * for OLCUT.
      */
@@ -60,9 +95,66 @@ private BinaryResponseProcessor() {}
      * @param outputFactory The output factory to use.
      */
     public BinaryResponseProcessor(String fieldName, String positiveResponse, OutputFactory<T> outputFactory) {
-        this.fieldName = fieldName;
-        this.positiveResponse = positiveResponse;
+        this(Collections.singletonList(fieldName), positiveResponse, outputFactory);
+    }
+
+    /**
+     * Constructs a binary response processor which emits a positive value for a single string
+     * and a negative value for all other field values.
+     * @param fieldNames The field names to read.
+     * @param positiveResponse The positive response to look for.
+     * @param outputFactory The output factory to use.
+     */
+    public BinaryResponseProcessor(List<String> fieldNames, String positiveResponse, OutputFactory<T> outputFactory) {
+        this(fieldNames, Collections.nCopies(fieldNames.size(), positiveResponse), outputFactory);
+    }
+
+    /**
+     * Constructs a binary response processor which emits a positive value for a single string
+     * and a negative value for all other field values. the lengths of fieldNames and positiveResponses
+     * must be the same.
+     * @param fieldNames The field names to read.
+     * @param positiveResponses The positive responses to look for.
+     * @param outputFactory The output factory to use.
+     */
+    public BinaryResponseProcessor(List<String> fieldNames, List<String> positiveResponses, OutputFactory<T> outputFactory) {
+        this(fieldNames, positiveResponses, outputFactory, false);
+    }
+
+    /**
+     * Constructs a binary response processor which emits a positive value for a single string
+     * and a negative value for all other field values. the lengths of fieldNames and positiveResponses
+     * must be the same.
+     * @param fieldNames The field names to read.
+     * @param positiveResponses The positive responses to look for.
+     * @param outputFactory The output factory to use.
+     * @param displayField whether to include field names in the generated labels.
+     */
+    public BinaryResponseProcessor(List<String> fieldNames, List<String> positiveResponses, OutputFactory<T> outputFactory, boolean displayField) {
+        this(fieldNames, positiveResponses, outputFactory, "1", "0", displayField);
+    }
+
+    /**
+     * Constructs a binary response processor which emits a positive value for a single string
+     * and a negative value for all other field values. the lengths of fieldNames and positiveResponses
+     * must be the same.
+     * @param fieldNames The field names to read.
+     * @param positiveResponses The positive responses to look for.
+     * @param outputFactory The output factory to use.
+     * @param positiveName The value of a 'positive' output
+     * @param negativeName the value of a 'negative' output
+     * @param displayField whether to include field names in the generated labels.
+     */
+    public BinaryResponseProcessor(List<String> fieldNames, List<String> positiveResponses, OutputFactory<T> outputFactory, String positiveName, String negativeName, boolean displayField) {
+        if(fieldNames.size() != positiveResponses.size()) {
+            throw new IllegalArgumentException("fieldNames and positiveResponses must be the same length");
+        }
+        this.fieldNames = fieldNames;
+        this.positiveResponses = positiveResponses;
         this.outputFactory = outputFactory;
+        this.positiveName = positiveName;
+        this.negativeName = negativeName;
+        this.displayField = displayField;
     }
 
     @Override
@@ -72,7 +164,7 @@ public OutputFactory<T> getOutputFactory() {
 
     @Override
     public String getFieldName() {
-        return fieldName;
+        return fieldNames.get(0);
     }
 
     @Deprecated
@@ -83,12 +175,30 @@ public void setFieldName(String fieldName) {
 
     @Override
     public Optional<T> process(String value) {
-        return Optional.of(outputFactory.generateOutput(positiveResponse.equals(value) ? positiveName : negativeName));
+        return process(Collections.singletonList(value));
+    }
+
+    @Override
+    public Optional<T> process(List<String> values) {
+        List<String> responses = new ArrayList<>();
+        String prefix = "";
+        for(int i=0; i < fieldNames.size(); i++) {
+            if(displayField) {
+                prefix = fieldNames.get(i) + "=";
+            }
+            responses.add(prefix + (positiveResponses.get(i).equals(values.get(i)) ? positiveName : negativeName));
+        }
+        return Optional.of(outputFactory.generateOutput(fieldNames.size() == 1 ? responses.get(0) : responses));
+    }
+
+    @Override
+    public List<String> getFieldNames() {
+        return fieldNames;
     }
 
     @Override
     public String toString() {
-        return "BinaryResponseProcessor(fieldName="+ fieldName +", positiveResponse="+ positiveResponse +", positiveName="+positiveName +", negativeName="+negativeName+")";
+        return "BinaryResponseProcessor(fieldNames="+ fieldNames.toString() +", positiveResponses="+ positiveResponses.toString() +", positiveName="+positiveName +", negativeName="+negativeName+")";
     }
 
     @Override

Data/src/main/java/org/tribuo/data/columnar/processors/response/EmptyResponseProcessor.java

@@ -23,6 +23,8 @@
 import org.tribuo.OutputFactory;
 import org.tribuo.data.columnar.ResponseProcessor;
 
+import java.util.Collections;
+import java.util.List;
 import java.util.Optional;
 
 /**
@@ -84,6 +86,16 @@ public Optional<T> process(String value) {
         return Optional.empty();
     }
 
+    @Override
+    public Optional<T> process(List<String> values) {
+        return Optional.empty();
+    }
+
+    @Override
+    public List<String> getFieldNames() {
+        return Collections.singletonList(FIELD_NAME);
+    }
+
     @Override
     public String toString() {
         return "EmptyResponseProcessor(outputFactory="+outputFactory.toString()+")";