Class QueryContextImpl

    • Constructor Detail

      • QueryContextImpl

        public QueryContextImpl()
    • Method Detail

      • available

        public boolean available​(java.lang.Class<?> type,
                                 Argument.Advice advice)
        Description copied from interface: IQueryContext
        Is this type of data available from the context?
        Specified by:
        available in interface IQueryContext
        Parameters:
        type - the type the data should be converted to
        advice - advice such as from the query as to how the value should be converted.
        Returns:
        true if available.
      • get

        public java.lang.Object get​(java.lang.Class<?> type,
                                    Argument.Advice advice)
        Description copied from interface: IQueryContext
        Get this type of data from the context.
        Specified by:
        get in interface IQueryContext
        Parameters:
        type - the type the data should be converted to
        advice - advice such as from the query as to how the value should be converted.
        Returns:
        the object of the right type
      • converts

        public boolean converts​(java.lang.Class<?> type,
                                Argument.Advice advice)
        Description copied from interface: IQueryContext
        Does the context have a converter for data of this type?
        Specified by:
        converts in interface IQueryContext
        Parameters:
        type - The Java type of an argument to be supplied with data from this context.
        advice - Further details about the argument to be supplied with data.
        Returns:
        true if available and convertible
      • convertToString

        public java.lang.String convertToString​(java.lang.Class<?> type,
                                                Argument.Advice advice,
                                                java.lang.Object value)
                                         throws SnapshotException
        Description copied from interface: IQueryContext
        Convert the value to a string. For example the converter might be String.valueOf(Integer)
        Specified by:
        convertToString in interface IQueryContext
        Parameters:
        type - The Java type of the argument.
        advice - Further details about the argument.
        value - The value of the argument held in the context.
        Returns:
        the value converted to a String
        Throws:
        SnapshotException - If there is a problem with the conversion such as the value is not a valid object ID.
      • convertToValue

        public java.lang.Object convertToValue​(java.lang.Class<?> type,
                                               Argument.Advice advice,
                                               java.lang.String value)
                                        throws SnapshotException
        Description copied from interface: IQueryContext
        Convert the String to the value based on the type and advice.
        Specified by:
        convertToValue in interface IQueryContext
        Parameters:
        type - The Java type of the argument
        advice - Further details about the argument.
        value - The readable string value
        Returns:
        the String converted to a value suitable to be stored in the argument.
        Throws:
        SnapshotException - if there is a problem with the conversion, such as an unknown object address.