content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *        http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   */
  package org.apache.causeway.viewer.wicket.model.value;
  
  import java.util.Locale;
  
  import org.apache.wicket.util.convert.ConversionException;
  import org.apache.wicket.util.convert.IConverter;
  
  import org.jspecify.annotations.Nullable;
  import org.springframework.util.ClassUtils;
  
  import org.apache.causeway.commons.internal.assertions._Assert;
  import org.apache.causeway.commons.internal.base._Casts;
  import org.apache.causeway.commons.internal.exceptions._Exceptions;
  import org.apache.causeway.core.metamodel.commons.ViewOrEditMode;
  import org.apache.causeway.core.metamodel.facets.object.value.ValueFacet;
  import org.apache.causeway.core.metamodel.spec.feature.ObjectFeature;
  
  import org.jspecify.annotations.NonNull;
  
  public class ConverterBasedOnValueSemantics<T>
  extends ValueSemanticsModelAbstract
  implements IConverter<T> {
  
      private static final long serialVersionUID = 1L;
  
      public final Class<T> type;
      public final Class<?> resolvedType;
  
      public ConverterBasedOnValueSemantics(
              final @NonNull Class<T> type,
              final @NonNull ObjectFeature propOrParam,
              final @NonNull ViewOrEditMode scalarRepresentation) {
          super(propOrParam, scalarRepresentation);
          this.type = type;
          this.resolvedType = ClassUtils.resolvePrimitiveIfNecessary(propOrParam.getElementType().getCorrespondingClass());
          _Assert.assertTypeIsInstanceOf(resolvedType, type);
      }
  
      public final boolean canHandle(final @Nullable Class<?> aType) {
          return aType!=null
                  && resolvedType.isAssignableFrom(ClassUtils.resolvePrimitiveIfNecessary(aType));
      }
  
      /**
       * Parameter {@code locale} is ignored!
       * @see IConverter#convertToObject(String, Locale)
       */
      @Override
      public final T convertToObject(final String text, final Locale locale) throws ConversionException {
  
          // guard against framework bugs
          if(scalarRepresentation.isViewing()) {
              throw _Exceptions.illegalArgument("Internal Error: "
                      + "cannot convert a rendering representation back to its value-type '%s' -> %s",
                          text,
                          featureIdentifier);
          }
  
          var feature = feature();
          var valueFacet = valueFacet();
  
          var context = valueFacet
                  .createValueSemanticsContext(feature);
  
          try {
              return valueFacet.selectParserForAttributeOrElseFallback(feature)
                      .parseTextRepresentation(context, text);
          } catch (Exception e) {
              if(e instanceof ConversionException) {
                  throw e;
              } else {
                  throw new ConversionException(e.getMessage(), e);
              }
          }
      }
  
      /**
       * Parameter {@code locale} is ignored!
       * @see IConverter#convertToString(Object, Locale)
       */
      @Override
      public final String convertToString(final T value, final Locale locale) {
  
          var feature = feature();
          var valueFacet = valueFacet();
  
          var context = valueFacet
                  .createValueSemanticsContext(feature);
  
          switch(scalarRepresentation) {
          case EDITING:
              return valueFacet.selectParserForAttributeOrElseFallback(feature)
                      .parseableTextRepresentation(context, value);
          case VIEWING:
              return propOrParam.fold(
                      prop->valueFacet.selectRendererForParamOrPropOrCollOrElseFallback(prop)
                              .titlePresentation(context, value),
                      param->valueFacet.selectRendererForParamOrPropOrCollOrElseFallback(param)
                              .titlePresentation(context, value));
          }
  
          throw _Exceptions.unmatchedCase(scalarRepresentation);
      }
  
      public String getEditingPattern() {
          var feature = feature();
          var valueFacet = valueFacet();
          var context = valueFacet
                  .createValueSemanticsContext(feature);
          return valueFacet.selectParserForAttributeOrElseFallback(feature)
                  .getPattern(context);
      }
  
      // -- HELPER
  
      @Override
      protected ValueFacet<T> valueFacet() {
          return _Casts.uncheckedCast(super.valueFacet());
      }
  
  }
  