content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * Licensed 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.activiti.core.el.juel.misc;
  
  import jakarta.el.ELException;
  import java.beans.PropertyEditor;
  import java.beans.PropertyEditorManager;
  import java.math.BigDecimal;
  import java.math.BigInteger;
  
  /**
   * Type Conversions as described in EL 2.1 specification (section 1.17).
   */
  public class TypeConverterImpl implements TypeConverter {
  
      private static final long serialVersionUID = 1L;
  
      protected Boolean coerceToBoolean(Object value) {
          if (value == null || "".equals(value)) {
              return Boolean.FALSE;
          }
          if (value instanceof Boolean) {
              return (Boolean) value;
          }
          if (value instanceof String) {
              return Boolean.valueOf((String) value);
          }
          throw new ELException(LocalMessages.get("error.coerce.type", value, value.getClass(), Boolean.class));
      }
  
      protected Character coerceToCharacter(Object value) {
          if (value == null || "".equals(value)) {
              return Character.valueOf((char) 0);
          }
          if (value instanceof Character) {
              return (Character) value;
          }
          if (value instanceof Number) {
              return Character.valueOf((char) ((Number) value).shortValue());
          }
          if (value instanceof String) {
              return Character.valueOf(((String) value).charAt(0));
          }
          throw new ELException(LocalMessages.get("error.coerce.type", value, value.getClass(), Character.class));
      }
  
      protected BigDecimal coerceToBigDecimal(Object value) {
          if (value == null || "".equals(value)) {
              return BigDecimal.valueOf(0l);
          }
          if (value instanceof BigDecimal) {
              return (BigDecimal) value;
          }
          if (value instanceof BigInteger) {
              return new BigDecimal((BigInteger) value);
          }
          if (value instanceof Number) {
              return new BigDecimal(((Number) value).doubleValue());
          }
          if (value instanceof String) {
              try {
                  return new BigDecimal((String) value);
              } catch (NumberFormatException e) {
                  throw new ELException(
                      LocalMessages.get("error.coerce.value", value, value.getClass(), BigDecimal.class)
                  );
              }
          }
          if (value instanceof Character) {
              return new BigDecimal((short) ((Character) value).charValue());
          }
          throw new ELException(LocalMessages.get("error.coerce.type", value, value.getClass(), BigDecimal.class));
      }
  
      protected BigInteger coerceToBigInteger(Object value) {
          if (value == null || "".equals(value)) {
              return BigInteger.valueOf(0l);
          }
          if (value instanceof BigInteger) {
              return (BigInteger) value;
          }
          if (value instanceof BigDecimal) {
              return ((BigDecimal) value).toBigInteger();
          }
          if (value instanceof Number) {
              return BigInteger.valueOf(((Number) value).longValue());
          }
          if (value instanceof String) {
              try {
                  return new BigInteger((String) value);
              } catch (NumberFormatException e) {
                  throw new ELException(
                      LocalMessages.get("error.coerce.value", value, value.getClass(), BigInteger.class)
                  );
              }
          }
          if (value instanceof Character) {
              return BigInteger.valueOf((short) ((Character) value).charValue());
          }
          throw new ELException(LocalMessages.get("error.coerce.type", value, value.getClass(), BigInteger.class));
      }
  
      protected Double coerceToDouble(Object value) {
          if (value == null || "".equals(value)) {
              return Double.valueOf(0);
          }
          if (value instanceof Double) {
              return (Double) value;
          }
          if (value instanceof Number) {
              return Double.valueOf(((Number) value).doubleValue());
          }
          if (value instanceof String) {
              try {
                  return Double.valueOf((String) value);
              } catch (NumberFormatException e) {
                  throw new ELException(LocalMessages.get("error.coerce.value", value, value.getClass(), Double.class));
              }
          }
          if (value instanceof Character) {
              return Double.valueOf((short) ((Character) value).charValue());
          }
          throw new ELException(LocalMessages.get("error.coerce.type", value, value.getClass(), Double.class));
      }
  
      protected Float coerceToFloat(Object value) {
          if (value == null || "".equals(value)) {
              return Float.valueOf(0);
          }
          if (value instanceof Float) {
              return (Float) value;
          }
          if (value instanceof Number) {
              return Float.valueOf(((Number) value).floatValue());
          }
          if (value instanceof String) {
              try {
                  return Float.valueOf((String) value);
              } catch (NumberFormatException e) {
                  throw new ELException(LocalMessages.get("error.coerce.value", value, value.getClass(), Float.class));
              }
          }
          if (value instanceof Character) {
              return Float.valueOf((short) ((Character) value).charValue());
          }
          throw new ELException(LocalMessages.get("error.coerce.type", value, value.getClass(), Float.class));
      }
  
      protected Long coerceToLong(Object value) {
          if (value == null || "".equals(value)) {
              return Long.valueOf(0l);
          }
          if (value instanceof Long) {
              return (Long) value;
          }
          if (value instanceof Number) {
              return Long.valueOf(((Number) value).longValue());
          }
          if (value instanceof String) {
              try {
                  return Long.valueOf((String) value);
              } catch (NumberFormatException e) {
                  throw new ELException(LocalMessages.get("error.coerce.value", value, value.getClass(), Long.class));
              }
          }
          if (value instanceof Character) {
              return Long.valueOf((short) ((Character) value).charValue());
          }
          throw new ELException(LocalMessages.get("error.coerce.type", value, value.getClass(), Long.class));
      }
  
      protected Integer coerceToInteger(Object value) {
          if (value == null || "".equals(value)) {
              return Integer.valueOf(0);
          }
          if (value instanceof Integer) {
              return (Integer) value;
          }
          if (value instanceof Number) {
              return Integer.valueOf(((Number) value).intValue());
          }
          if (value instanceof String) {
              try {
                  return Integer.valueOf((String) value);
              } catch (NumberFormatException e) {
                  throw new ELException(LocalMessages.get("error.coerce.value", value, value.getClass(), Integer.class));
              }
          }
          if (value instanceof Character) {
              return Integer.valueOf((short) ((Character) value).charValue());
          }
          throw new ELException(LocalMessages.get("error.coerce.type", value, value.getClass(), Integer.class));
      }
  
      protected Short coerceToShort(Object value) {
          if (value == null || "".equals(value)) {
              return Short.valueOf((short) 0);
          }
          if (value instanceof Short) {
              return (Short) value;
          }
          if (value instanceof Number) {
              return Short.valueOf(((Number) value).shortValue());
          }
          if (value instanceof String) {
              try {
                  return Short.valueOf((String) value);
              } catch (NumberFormatException e) {
                  throw new ELException(LocalMessages.get("error.coerce.value", value, value.getClass(), Short.class));
              }
          }
          if (value instanceof Character) {
              return Short.valueOf((short) ((Character) value).charValue());
          }
          throw new ELException(LocalMessages.get("error.coerce.type", value, value.getClass(), Short.class));
      }
  
      protected Byte coerceToByte(Object value) {
          if (value == null || "".equals(value)) {
              return Byte.valueOf((byte) 0);
          }
          if (value instanceof Byte) {
              return (Byte) value;
          }
          if (value instanceof Number) {
              return Byte.valueOf(((Number) value).byteValue());
          }
          if (value instanceof String) {
              try {
                  return Byte.valueOf((String) value);
              } catch (NumberFormatException e) {
                  throw new ELException(LocalMessages.get("error.coerce.value", value, value.getClass(), Byte.class));
              }
          }
          if (value instanceof Character) {
              return Byte.valueOf(Short.valueOf((short) ((Character) value).charValue()).byteValue());
          }
          throw new ELException(LocalMessages.get("error.coerce.type", value, value.getClass(), Byte.class));
      }
  
      protected String coerceToString(Object value) {
          if (value == null) {
              return "";
          }
          if (value instanceof String) {
              return (String) value;
          }
          if (value instanceof Enum<?>) {
              return ((Enum<?>) value).name();
          }
          return value.toString();
      }
  
      @SuppressWarnings("unchecked")
      protected <T extends Enum<T>> T coerceToEnum(Object value, Class<T> type) {
          if (value == null || "".equals(value)) {
              return null;
          }
          if (type.isInstance(value)) {
              return (T) value;
          }
          if (value instanceof String) {
              try {
                  return Enum.valueOf(type, (String) value);
              } catch (IllegalArgumentException e) {
                  throw new ELException(LocalMessages.get("error.coerce.value", value, value.getClass(), type));
              }
          }
          throw new ELException(LocalMessages.get("error.coerce.type", value, value.getClass(), type));
      }
  
      protected Object coerceStringToType(String value, Class<?> type) {
          PropertyEditor editor = PropertyEditorManager.findEditor(type);
          if (editor == null) {
              if ("".equals(value)) {
                  return null;
              }
              throw new ELException(LocalMessages.get("error.coerce.type", value, String.class, type));
          } else {
              if ("".equals(value)) {
                  try {
                      editor.setAsText(value);
                  } catch (IllegalArgumentException e) {
                      return null;
                  }
              } else {
                  try {
                      editor.setAsText(value);
                  } catch (IllegalArgumentException e) {
                      throw new ELException(LocalMessages.get("error.coerce.value", value, value.getClass(), type));
                  }
              }
              return editor.getValue();
          }
      }
  
      @SuppressWarnings("unchecked")
      protected Object coerceToType(Object value, Class<?> type) {
          if (type == String.class) {
              return coerceToString(value);
          }
          if (type == Long.class || type == long.class) {
              return coerceToLong(value);
          }
          if (type == Double.class || type == double.class) {
              return coerceToDouble(value);
          }
          if (type == Boolean.class || type == boolean.class) {
              return coerceToBoolean(value);
          }
          if (type == Integer.class || type == int.class) {
              return coerceToInteger(value);
          }
          if (type == Float.class || type == float.class) {
              return coerceToFloat(value);
          }
          if (type == Short.class || type == short.class) {
              return coerceToShort(value);
          }
          if (type == Byte.class || type == byte.class) {
              return coerceToByte(value);
          }
          if (type == Character.class || type == char.class) {
              return coerceToCharacter(value);
          }
          if (type == BigDecimal.class) {
              return coerceToBigDecimal(value);
          }
          if (type == BigInteger.class) {
              return coerceToBigInteger(value);
          }
          if (type.getSuperclass() == Enum.class) {
              return coerceToEnum(value, (Class<? extends Enum>) type);
          }
          if (value == null || value.getClass() == type || type.isInstance(value)) {
              return value;
          }
          if (value instanceof String) {
              return coerceStringToType((String) value, type);
          }
          throw new ELException(LocalMessages.get("error.coerce.type", value, value.getClass(), type));
      }
  
      @Override
      public boolean equals(Object obj) {
          return obj != null && obj.getClass().equals(getClass());
      }
  
      @Override
      public int hashCode() {
          return getClass().hashCode();
      }
  
      @SuppressWarnings("unchecked")
      public <T> T convert(Object value, Class<T> type) throws ELException {
          return (T) coerceToType(value, type);
      }
  }
  