Package org.springframework.expression

Examples of org.springframework.expression.AccessException

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    @SuppressWarnings("unchecked")
    public void write(
            final EvaluationContext context, final Object target, final String name, final Object newValue)
            throws AccessException {
        if (target == null) {
            throw new AccessException("Cannot write property of null target");
        }
        if (!(target instanceof VariablesMap)) {
            // This can happen simply because we're applying the same
            // AST tree on a different class (Spring internally caches property accessors).
            // So this exception might be considered "normal" by Spring AST evaluator and
            // just use it to refresh the property accessor cache.
            throw new AccessException("Cannot write target of class " + target.getClass().getName());
        }
        ((VariablesMap<String,Object>)target).put(name, newValue);
    }
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        if (!(target instanceof Beans)) {
            // This can happen simply because we're applying the same
            // AST tree on a different class (Spring internally caches property accessors).
            // So this exception might be considered "normal" by Spring AST evaluator and
            // just use it to refresh the property accessor cache.
            throw new AccessException("Cannot read target of class " + target.getClass().getName());
        }
        return ((Beans)target).containsKey(name);
    }
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    @Override
    public TypedValue read(final EvaluationContext context, final Object target, final String name)
            throws AccessException {
        if (target == null) {
            throw new AccessException("Cannot read property of null target");
        }
        if (!(target instanceof Beans)) {
            // This can happen simply because we're applying the same
            // AST tree on a different class (Spring internally caches property accessors).
            // So this exception might be considered "normal" by Spring AST evaluator and
            // just use it to refresh the property accessor cache.
            throw new AccessException("Cannot read target of class " + target.getClass().getName());
        }
        return new TypedValue(((Beans)target).get(name));
    }
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    @Override
    @SuppressWarnings("unchecked")
    public TypedValue read(final EvaluationContext context, final Object target, final String name)
            throws AccessException {
        if (target == null) {
            throw new AccessException("Cannot read property of null target");
        }
        if (!(target instanceof VariablesMap)) {
            // This can happen simply because we're applying the same
            // AST tree on a different class (Spring internally caches property accessors).
            // So this exception might be considered "normal" by Spring AST evaluator and
            // just use it to refresh the property accessor cache.
            throw new AccessException("Cannot read target of class " + target.getClass().getName());
        }
        return new TypedValue(((VariablesMap<String,?>)target).get(name));
    }
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    @SuppressWarnings("unchecked")
    public void write(
            final EvaluationContext context, final Object target, final String name, final Object newValue)
            throws AccessException {
        if (target == null) {
            throw new AccessException("Cannot write property of null target");
        }
        if (!(target instanceof VariablesMap)) {
            // This can happen simply because we're applying the same
            // AST tree on a different class (Spring internally caches property accessors).
            // So this exception might be considered "normal" by Spring AST evaluator and
            // just use it to refresh the property accessor cache.
            throw new AccessException("Cannot write target of class " + target.getClass().getName());
        }
        ((VariablesMap<String,Object>)target).put(name, newValue);
    }
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        if (!(target instanceof Beans)) {
            // This can happen simply because we're applying the same
            // AST tree on a different class (Spring internally caches property accessors).
            // So this exception might be considered "normal" by Spring AST evaluator and
            // just use it to refresh the property accessor cache.
            throw new AccessException("Cannot read target of class " + target.getClass().getName());
        }
        return ((Beans)target).containsKey(name);
    }
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    @Override
    public TypedValue read(final EvaluationContext context, final Object target, final String name)
            throws AccessException {
        if (target == null) {
            throw new AccessException("Cannot read property of null target");
        }
        if (!(target instanceof Beans)) {
            // This can happen simply because we're applying the same
            // AST tree on a different class (Spring internally caches property accessors).
            // So this exception might be considered "normal" by Spring AST evaluator and
            // just use it to refresh the property accessor cache.
            throw new AccessException("Cannot read target of class " + target.getClass().getName());
        }
        return new TypedValue(((Beans)target).get(name));
    }
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    return false;
  }

  public TypedValue read(EvaluationContext context, Object target, String name) throws AccessException {
    if (target == null) {
      throw new AccessException("Cannot read property of null target");
    }
    Class<?> type = (target instanceof Class ? (Class<?>) target : target.getClass());

    if (type.isArray() && name.equals("length")) {
      if (target instanceof Class) {
        throw new AccessException("Cannot access length on array class itself");
      }
      return new TypedValue(Array.getLength(target));
    }

    CacheKey cacheKey = new CacheKey(type, name);
    InvokerPair invoker = this.readerCache.get(cacheKey);

    if (invoker == null || invoker.member instanceof Method) {
      Method method = (Method) (invoker != null ? invoker.member : null);
      if (method == null) {
        method = findGetterForProperty(name, type, target);
        if (method != null) {
          // TODO remove the duplication here between canRead and read
          // Treat it like a property
          // The readerCache will only contain gettable properties (let's not worry about setters for now)
          Property property = new Property(type, method, null);
          TypeDescriptor typeDescriptor = new TypeDescriptor(property);
          invoker = new InvokerPair(method, typeDescriptor);
          this.readerCache.put(cacheKey, invoker);
        }
      }
      if (method != null) {
        try {
          ReflectionUtils.makeAccessible(method);
          Object value = method.invoke(target);
          return new TypedValue(value, invoker.typeDescriptor.narrow(value));
        }
        catch (Exception ex) {
          throw new AccessException("Unable to access property '" + name + "' through getter", ex);
        }
      }
    }

    if (invoker == null || invoker.member instanceof Field) {
      Field field = (Field) (invoker == null ? null : invoker.member);
      if (field == null) {
        field = findField(name, type, target);
        if (field != null) {
          invoker = new InvokerPair(field, new TypeDescriptor(field));
          this.readerCache.put(cacheKey, invoker);
        }
      }
      if (field != null) {
        try {
          ReflectionUtils.makeAccessible(field);
          Object value = field.get(target);
          return new TypedValue(value, invoker.typeDescriptor.narrow(value));
        }
        catch (Exception ex) {
          throw new AccessException("Unable to access field: " + name, ex);
        }
      }
    }

    throw new AccessException("Neither getter nor field found for property '" + name + "'");
  }
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    return false;
  }

  public void write(EvaluationContext context, Object target, String name, Object newValue) throws AccessException {
    if (target == null) {
      throw new AccessException("Cannot write property on null target");
    }
    Class<?> type = (target instanceof Class ? (Class<?>) target : target.getClass());

    Object possiblyConvertedNewValue = newValue;
    TypeDescriptor typeDescriptor = getTypeDescriptor(context, target, name);
    if (typeDescriptor != null) {
      try {
        possiblyConvertedNewValue = context.getTypeConverter().convertValue(
            newValue, TypeDescriptor.forObject(newValue), typeDescriptor);
      }
      catch (EvaluationException evaluationException) {
        throw new AccessException("Type conversion failure",evaluationException);
      }
    }
    CacheKey cacheKey = new CacheKey(type, name);
    Member cachedMember = this.writerCache.get(cacheKey);

    if (cachedMember == null || cachedMember instanceof Method) {
      Method method = (Method) cachedMember;
      if (method == null) {
        method = findSetterForProperty(name, type, target);
        if (method != null) {
          cachedMember = method;
          this.writerCache.put(cacheKey, cachedMember);
        }
      }
      if (method != null) {
        try {
          ReflectionUtils.makeAccessible(method);
          method.invoke(target, possiblyConvertedNewValue);
          return;
        }
        catch (Exception ex) {
          throw new AccessException("Unable to access property '" + name + "' through setter", ex);
        }
      }
    }

    if (cachedMember == null || cachedMember instanceof Field) {
      Field field = (Field) cachedMember;
      if (field == null) {
        field = findField(name, type, target);
        if (field != null) {
          cachedMember = field;
          this.writerCache.put(cacheKey, cachedMember);
        }
      }
      if (field != null) {
        try {
          ReflectionUtils.makeAccessible(field);
          field.set(target, possiblyConvertedNewValue);
          return;
        }
        catch (Exception ex) {
          throw new AccessException("Unable to access field: " + name, ex);
        }
      }
    }

    throw new AccessException("Neither setter nor field found for property '" + name + "'");
  }
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          }
          Object value = ((Method) this.member).invoke(target);
          return new TypedValue(value, this.typeDescriptor.narrow(value));
        }
        catch (Exception ex) {
          throw new AccessException("Unable to access property '" + name + "' through getter", ex);
        }
      }
      if (this.member instanceof Field) {
        try {
          if (this.needsToBeMadeAccessible) {
            ReflectionUtils.makeAccessible((Field) this.member);
          }
          Object value = ((Field) this.member).get(target);
          return new TypedValue(value, this.typeDescriptor.narrow(value));
        }
        catch (Exception ex) {
          throw new AccessException("Unable to access field: " + name, ex);
        }
      }
      throw new AccessException("Neither getter nor field found for property '" + name + "'");
    }
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