indexedpropertydescriptor.java

gcc的组建

                                             + "the same class.");
          }
      }

    if (getIndex != null
        && (getIndex.getParameterTypes().length != 1
         || !(getIndex.getParameterTypes()[0]).equals(java.lang.Integer.TYPE)))
      {
        throw new IntrospectionException("get index method has wrong "
                                         + "parameters");
      }
    if (setIndex != null
       && (setIndex.getParameterTypes().length != 2
         || !(setIndex.getParameterTypes()[0]).equals(java.lang.Integer.TYPE)))
      {
        throw new IntrospectionException("set index method has wrong "
                                         + "parameters");
      }
    if (getIndex != null && setIndex != null)
      {
        if(!getIndex.getReturnType().equals(setIndex.getParameterTypes()[1]))
          {
            throw new IntrospectionException("set index methods do not share "
                                             + "the same type");
          }
        if(!getIndex.getDeclaringClass().isAssignableFrom
           (setIndex.getDeclaringClass())
           && !setIndex.getDeclaringClass().isAssignableFrom
           (getIndex.getDeclaringClass()))
          {
            throw new IntrospectionException("get and set index methods are "
                                             + "not in the same class.");
          }
      }

    if (getIndex != null && getMethod != null
        && !getIndex.getDeclaringClass().isAssignableFrom
        (getMethod.getDeclaringClass())
        && !getMethod.getDeclaringClass().isAssignableFrom
        (getIndex.getDeclaringClass()))
      {
        throw new IntrospectionException("methods are not in the same class.");
      }

    if (getIndex != null && getMethod != null
        && !Array.newInstance(getIndex.getReturnType(),0)
        .getClass().equals(getMethod.getReturnType()))
      {
        throw new IntrospectionException("array methods do not match index "
                                         + "methods.");
      }

    this.getMethod = getMethod;
    this.setMethod = setMethod;
    this.getIndex = getIndex;
    this.setIndex = setIndex;
    this.indexedPropertyType = getIndex != null ? getIndex.getReturnType()
                                             : setIndex.getParameterTypes()[1];
    this.propertyType = getMethod != null ? getMethod.getReturnType()
      : (setMethod != null ? setMethod.getParameterTypes()[0]
         : Array.newInstance(this.indexedPropertyType,0).getClass());
  }

  public Class getIndexedPropertyType()
  {
    return indexedPropertyType;
  }

  public Method getIndexedReadMethod()
  {
    return getIndex;
  }

  /**
   * Sets the method that is used to read an indexed property.
   *
   * @param m the method to set
   */
  public void setIndexedReadMethod(Method m) throws IntrospectionException
  {
    getIndex = m;
  }

  public Method getIndexedWriteMethod()
  {
    return setIndex;
  }

  /**
   * Sets the method that is used to write an indexed property.
   *
   * @param m the method to set
   */
  public void setIndexedWriteMethod(Method m) throws IntrospectionException
  {
    setIndex = m;
  }

  private void findMethods(Class beanClass, String getMethodName,
                           String setMethodName, String getIndexName,
                           String setIndexName)
    throws IntrospectionException
  {
    try
      {
        if(getIndexName != null)
          {
            try
              {
                Class[] getArgs = new Class[1];
                getArgs[0] = java.lang.Integer.TYPE;
                getIndex = beanClass.getMethod(getIndexName,getArgs);
                indexedPropertyType = getIndex.getReturnType();
              }
            catch(NoSuchMethodException E)
              {
              }
          }
        if(getIndex != null)
          {
            if(setIndexName != null)
              {
                try
                  {
                    Class[] setArgs = new Class[2];
                    setArgs[0] = java.lang.Integer.TYPE;
                    setArgs[1] = indexedPropertyType;
                    setIndex = beanClass.getMethod(setIndexName,setArgs);
                    if(!setIndex.getReturnType().equals(java.lang.Void.TYPE))
                      {
                        throw new IntrospectionException(setIndexName
                                                + " has non-void return type");
                      }
                  }
                catch(NoSuchMethodException E)
                  {
                  }
              }
          }
        else if(setIndexName != null)
          {
            Method[] m = beanClass.getMethods();
            for(int i=0;i<m.length;i++)
              {
                Method current = m[i];
                if(current.getName().equals(setIndexName)
                   && current.getParameterTypes().length == 2
                   && (current.getParameterTypes()[0])
                   .equals(java.lang.Integer.TYPE)
                   && current.getReturnType().equals(java.lang.Void.TYPE))
                  {
                    if(setIndex != null)
                      {
                        throw new IntrospectionException("Multiple, different "
                                     + "set methods found that fit the bill!");
                      }
                    else
                      {
                        setIndex = current;
                        indexedPropertyType = current.getParameterTypes()[1];
                      }
                  }
              }
            if(setIndex == null)
              {
                throw new IntrospectionException("Cannot find get or set "
                                                 + "methods.");
              }
          }
        else
          {
           throw new IntrospectionException("Cannot find get or set methods.");
          }

        Class arrayType = Array.newInstance(indexedPropertyType,0).getClass();

        Class[] setArgs = new Class[1];
        setArgs[0] = arrayType;
        try
          {
            setMethod = beanClass.getMethod(setMethodName,setArgs);
            if (!setMethod.getReturnType().equals(java.lang.Void.TYPE))
              {
                setMethod = null;
              }
          }
        catch(NoSuchMethodException E)
          {
          }

        Class[] getArgs = new Class[0];
        try
          {
            getMethod = beanClass.getMethod(getMethodName,getArgs);
            if (!getMethod.getReturnType().equals(arrayType))
              {
                getMethod = null;
              }
          }
        catch(NoSuchMethodException E)
          {
          }
      }
    catch(SecurityException E)
      {
        throw new IntrospectionException("SecurityException while trying to "
                                         + "find methods.");
      }
  }
}