org.rosuda.REngine
Class REXPInteger

java.lang.Object
  org.rosuda.REngine.REXP
      org.rosuda.REngine.REXPVector
          org.rosuda.REngine.REXPInteger

Direct Known Subclasses:

REXPFactor

public class REXPInteger
extends REXPVector

REXPDouble represents a vector of integer values.

Field Summary

static int	NA NA integer value as defined in R.
protected int[]	payload

Fields inherited from class org.rosuda.REngine.REXP

attr, maxDebugItems

Constructor Summary

REXPInteger(int load)
create integer vector of the length 1 with the given value as its first (and only) element

REXPInteger(int[] load)
create integer vector with the payload specified by load

REXPInteger(int[] load, REXPList attr)
create integer vector with the payload specified by load and attributes attr

Method Summary

double[]	asDoubles() returns the contents of this vector as doubles
int[]	asIntegers() returns the contents as an array of integers (if supported by the represented object)
java.lang.Object	asNativeJavaObject() attempt to represent the REXP by a native Java object and return it.
java.lang.String[]	asStrings() returns the contents of this vector as strings
boolean	isInteger() check whether the REXP object is an integer vector
boolean[]	isNA() returns a boolean vector of the same length as this vector with true for NA values and false for any other values
static boolean	isNA(int value)
boolean	isNumeric() check whether the REXP object is a numeric vector
int	length() returns the length of the vector (i.e. the number of elements)
java.lang.String	toDebugString() returns representation that it useful for debugging (e.g. it includes attributes and may include vector values -- see REXP.maxDebugItems)

Methods inherited from class org.rosuda.REngine.REXPVector

isVector, toString

Methods inherited from class org.rosuda.REngine.REXP

_attr, asBytes, asDouble, asDoubleMatrix, asFactor, asInteger, asList, asString, createDataFrame, createDoubleMatrix, dim, getAttribute, hasAttribute, inherits, isComplex, isEnvironment, isExpression, isFactor, isLanguage, isList, isLogical, isNull, isPairList, isRaw, isRecursive, isReference, isString, isSymbol

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

payload

protected int[] payload

NA

public static final int NA

NA integer value as defined in R. Unlike its real equivalent this one can be used in comparisons, although isNA(int) is provided for consistency.

See Also:

Constant Field Values

Constructor Detail

REXPInteger

public REXPInteger(int load)

create integer vector of the length 1 with the given value as its first (and only) element

REXPInteger

public REXPInteger(int[] load)

create integer vector with the payload specified by load

REXPInteger

public REXPInteger(int[] load,
                   REXPList attr)

create integer vector with the payload specified by load and attributes attr

Method Detail

isNA

public static boolean isNA(int value)

asNativeJavaObject

public java.lang.Object asNativeJavaObject()

Description copied from class: REXP

attempt to represent the REXP by a native Java object and return it. Note that this may lead to loss of information (e.g., factors may be returned as a string array) and attributes are ignored. Not all R types can be converted to native Java objects. Also note that R has no concept of scalars, so vectors of length 1 will always be returned as an arrays (i.e., int[1] and not Integer).

Overrides:

asNativeJavaObject in class REXP

length

public int length()

Description copied from class: REXPVector

returns the length of the vector (i.e. the number of elements)

Specified by:

length in class REXPVector

Returns:

length of the vector

isInteger

public boolean isInteger()

Description copied from class: REXP

check whether the REXP object is an integer vector

Overrides:

isInteger in class REXP

Returns:

true if the receiver is an integer vector, false otherwise

isNumeric

public boolean isNumeric()

Description copied from class: REXP

check whether the REXP object is a numeric vector

Overrides:

isNumeric in class REXP

Returns:

true if the receiver is a numeric vector, false otherwise

asIntegers

public int[] asIntegers()

Description copied from class: REXP

returns the contents as an array of integers (if supported by the represented object)

Overrides:

asIntegers in class REXP

asDoubles

public double[] asDoubles()

returns the contents of this vector as doubles

Overrides:

asDoubles in class REXP

asStrings

public java.lang.String[] asStrings()

returns the contents of this vector as strings

Overrides:

asStrings in class REXP

isNA

public boolean[] isNA()

Description copied from class: REXPVector

returns a boolean vector of the same length as this vector with true for NA values and false for any other values

Overrides:

isNA in class REXPVector

Returns:

a boolean vector of the same length as this vector with true for NA values and false for any other values

toDebugString

public java.lang.String toDebugString()

Description copied from class: REXP

returns representation that it useful for debugging (e.g. it includes attributes and may include vector values -- see REXP.maxDebugItems)

Overrides:

toDebugString in class REXPVector

Returns:

extended description of the obejct -- it may include vector values