java.lang.Object
- com.microstrategy.utils.BerInputStream

Direct Known Subclasses:

DerInputStream
```
public class BerInputStream
extends java.lang.Object
```
Decodes ASN.1 types encoded with BER (X.690)

Since:

MicroStrategy Web 9.0.1

Field Summary

Fields
Modifier and Type	Field	Description
`protected byte[]`	`buffer`	Internal buffer for storing encoded array
`int`	`choiceIndex`	The last choice index
`java.lang.Object`	`content`	Current decoded content
`protected int`	`contentOffset`	Current decoded content offset
`protected java.io.InputStream`	`in`	Associated `InputStream`
`protected static int`	`INDEFINIT_LENGTH`	Indicates indefinite length of the current type
`protected boolean`	`isIndefinedLength`	Indicates defined or indefined reading mode for associated InputStream.
`protected boolean`	`isVerify`	Indicates verify or store mode.
`protected int`	`length`	Current decoded length
`protected int`	`offset`	The position in the buffer.
`int`	`oidElement`
`int`	`tag`	Current decoded tag
`protected int`	`tagOffset`	Current decoded tag offset
`int[]`	`times`	Keeps last decoded: year, month, day, hour, minute, second, millisecond

Constructor Summary

Constructors
Constructor	Description
`BerInputStream(java.io.InputStream in)`	Creates stream for decoding.
`BerInputStream(java.io.InputStream in, int initialSize)`	Creates stream for decoding.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`compactBuffer()`	Reallocates the buffer in order to make it exactly the size of data it contains
`java.lang.Object`	`get(java.lang.Object key)`
`byte[]`	`getBuffer()`	Returns internal buffer used for decoding
`int`	`getContentOffset()`
`byte[]`	`getEncoded()`	Returns encoded array.
`int`	`getEndOffset()`	Returns end offset for the current encoded type
`int`	`getLength()`	Returns length of the current content for decoding
`static int`	`getLength(byte[] encoding)`	Returns the length of the encoding
`int`	`getOffset()`	Returns the current offset
`int`	`getTagOffset()`	Returns start offset for the current encoded type
`int`	`next()`	Decodes next encoded type.
`void`	`put(java.lang.Object key, java.lang.Object entry)`
`protected int`	`read()`	Reads the next encoded byte from the encoded input stream.
`void`	`readBitString()`	Decodes ASN.1 bitstring type
`void`	`readBoolean()`	Decodes ASN.1 boolean type
`void`	`readContent()`	Reads the next encoded content from the encoded input stream.
`void`	`readEnumerated()`	Decodes ASN.1 Enumerated type
`void`	`readOctetString()`	Decodes ASN.1 Octetstring type
`void`	`readOID()`	Decodes ASN.1 ObjectIdentifier type
`void`	`setVerify()`	Sets verify mode.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - in
```
protected java.io.InputStream in
```
    Associated InputStream
  - buffer
```
protected byte[] buffer
```
    Internal buffer for storing encoded array
  - offset
```
protected int offset
```
    The position in the buffer. Next read must place data into the buffer from this offset
  - INDEFINIT_LENGTH
```
protected static final int INDEFINIT_LENGTH
```
    Indicates indefinite length of the current type
    
    See Also:
    
    Constant Field Values
  - tag
```
public int tag
```
    Current decoded tag
  - length
```
protected int length
```
    Current decoded length
  - content
```
public java.lang.Object content
```
    Current decoded content
  - tagOffset
```
protected int tagOffset
```
    Current decoded tag offset
  - contentOffset
```
protected int contentOffset
```
    Current decoded content offset
  - choiceIndex
```
public int choiceIndex
```
    The last choice index
  - times
```
public int[] times
```
    Keeps last decoded: year, month, day, hour, minute, second, millisecond
  - oidElement
```
public int oidElement
```
  - isVerify
```
protected boolean isVerify
```
    Indicates verify or store mode. In store mode a decoded content is stored in a newly allocated appropriate object. The content variable holds a reference to the last created object. In verify mode a decoded content is not stored.
  - isIndefinedLength
```
protected boolean isIndefinedLength
```
    Indicates defined or indefined reading mode for associated InputStream. This mode is defined by reading a length for a first ASN.1 type from InputStream.
- Constructor Detail
  - BerInputStream
```
public BerInputStream(java.io.InputStream in)
               throws java.io.IOException
```
    Creates stream for decoding. Allocates initial buffer of default size
    
    Parameters:
    
    in - is associated InputStream
    
    Throws:
    
    java.io.IOException
  - BerInputStream
```
public BerInputStream(java.io.InputStream in,
                      int initialSize)
               throws java.io.IOException
```
    Creates stream for decoding. Allocates initial buffer of initialSize size
    
    Parameters:
    
    in - is associated InputStream
    
    initialSize - the internal buffer initial size
    
    Throws:
    
    java.io.IOException
- Method Detail
  - next
```
public int next()
         throws java.io.IOException
```
    Decodes next encoded type. Initializes tag, length, tagOffset and contentOffset variables
    
    Returns:
    
    next decoded tag
    
    Throws:
    
    java.io.IOException - - if error occured
  - getLength
```
public static int getLength(byte[] encoding)
```
    Returns the length of the encoding
  - readBitString
```
public void readBitString()
                   throws java.io.IOException
```
    Decodes ASN.1 bitstring type
    
    Throws:
    
    java.io.IOException - - if error occured
  - readEnumerated
```
public void readEnumerated()
                    throws java.io.IOException
```
    Decodes ASN.1 Enumerated type
    
    Throws:
    
    java.io.IOException - - if error occured
  - readBoolean
```
public void readBoolean()
                 throws java.io.IOException
```
    Decodes ASN.1 boolean type
    
    Throws:
    
    java.io.IOException - - if error occured
  - readOctetString
```
public void readOctetString()
                     throws java.io.IOException
```
    Decodes ASN.1 Octetstring type
    
    Throws:
    
    java.io.IOException - - if error occured
  - readOID
```
public void readOID()
             throws java.io.IOException
```
    Decodes ASN.1 ObjectIdentifier type
    
    Throws:
    
    java.io.IOException - - if error occured
  - getEncoded
```
public byte[] getEncoded()
```
    Returns encoded array. MUST be invoked after decoding corresponding ASN.1 notation
  - getBuffer
```
public final byte[] getBuffer()
```
    Returns internal buffer used for decoding
    
    Returns:
    
    - buffer
  - getLength
```
public final int getLength()
```
    Returns length of the current content for decoding
    
    Returns:
    
    - length of content
  - getOffset
```
public final int getOffset()
```
    Returns the current offset
    
    Returns:
    
    - offset
  - getEndOffset
```
public final int getEndOffset()
```
    Returns end offset for the current encoded type
    
    Returns:
    
    - offset
  - getTagOffset
```
public final int getTagOffset()
```
    Returns start offset for the current encoded type
    
    Returns:
    
    - offset
  - getContentOffset
```
public final int getContentOffset()
```
  - setVerify
```
public final void setVerify()
```
    Sets verify mode.
  - read
```
protected int read()
            throws java.io.IOException
```
    Reads the next encoded byte from the encoded input stream.
    
    Returns:
    
    the next encoded byte
    
    Throws:
    
    java.io.IOException - - if error occured
  - readContent
```
public void readContent()
                 throws java.io.IOException
```
    Reads the next encoded content from the encoded input stream. The method MUST be used for reading a primitive encoded content.
    
    Throws:
    
    java.io.IOException - - if error occured
  - compactBuffer
```
public void compactBuffer()
```
    Reallocates the buffer in order to make it exactly the size of data it contains
  - put
```
public void put(java.lang.Object key,
                java.lang.Object entry)
```
  - get
```
public java.lang.Object get(java.lang.Object key)
```

Class BerInputStream

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

in

buffer

offset

INDEFINIT_LENGTH

tag

length

content

tagOffset

contentOffset

choiceIndex

times

oidElement

isVerify

isIndefinedLength

Constructor Detail

BerInputStream

BerInputStream

Method Detail

next

getLength

readBitString

readEnumerated

readBoolean

readOctetString

readOID

getEncoded

getBuffer

getLength

getOffset

getEndOffset

getTagOffset

getContentOffset

setVerify

read

readContent

compactBuffer

put

get