invoke {sparklyr} | R Documentation

## Invoke a Method on a JVM Object

### Description

Invoke methods on Java object references. These functions provide a mechanism for invoking various Java object methods directly from R.

### Usage

    invoke(jobj, method, ...)

    invoke_static(sc, class, method, ...)

    invoke_new(sc, class, ...)

### Arguments

`jobj` | An R object acting as a Java object reference (typically, a `spark_jobj`).
`method` | The name of the method to be invoked.
`...` | Optional arguments, currently unused.
`sc` | A `spark_connection`.
`class` | The name of the Java class whose methods should be invoked.

### Details

Use each of these functions in the following scenarios:

`invoke` | Execute a method on a Java object reference (typically, a `spark_jobj`).
`invoke_static` | Execute a static method associated with a Java class.
`invoke_new` | Invoke a constructor associated with a Java class.

### Examples

    sc <- spark_connect(master = "spark://HOST:PORT")
    spark_context(sc) %>%
      invoke("textFile", "file.csv", 1L) %>%
        invoke("count")

[Package sparklyr version 0.6.3 Index]