ResultSequenceSerializer (Teiid 12.2.0 API)

java.lang.Object
- nux.xom.xquery.ResultSequenceSerializer

```
public class ResultSequenceSerializer
extends Object
```
Serializes an XQuery/XPath result sequence onto a given output stream, using various configurable serialization options such encoding, indentation and algorithm. The semantics of options are identical to the XOM Serializer, except the "algorithm" option.
The W3C algorithm serializes each item in the result sequence according to the XML Output Method of the W3C XQuery/XSLT2 Serialization Spec, with sequence normalization as defined therein. As such, it may output data that is not a well-formed document. For example, if the result sequence contains more than one element then a document with more than one root element will be output. However, for some use cases the algorithm does indeed output a well-formed XML document. For example, if the result sequence contains a single document or element node. Finally, note that an exception is thrown if the result sequence contains a (top-level) attribute node.
In contrast, the wrap algorithm wraps each item in the result sequence into a decorated element wrapper, thereby ensuring that any arbitrary result sequence can always be output as a well-formed XML document. This enables easy processing in subsequent XML processing pipeline stages. Unlike the W3C algorithm, the wrap algorithm does not perform sequence normalization. Thus, wrapping is better suited for XQuery debugging purposes, because one can see exactly what items a query does (or does not) return.
Example usage:
```
 Document doc = new Builder().build(new File("samples/data/p2pio-receive.xml"));
 Nodes results = XQueryUtil.xquery(doc, "//*");
 // Nodes results = XQueryUtil.xquery(doc, "//node(), //@*, 'Hello World!'");
 ResultSequenceSerializer ser = new ResultSequenceSerializer();
 ser.setEncoding("UTF-8");
 ser.setIndent(4);
 ser.setAlgorithm(ResultSequenceSerializer.W3C_ALGORITHM);
 // ser.setAlgorithm(ResultSequenceSerializer.WRAP_ALGORITHM);
 ser.write(results, System.out);
 
```
Version:

$Revision: 1.49 $, $Date: 2005/12/05 06:53:04 $

Author:

whoschek.AT.lbl.DOT.gov, $Author: hoschek3 $

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`W3C_ALGORITHM` Serializes each item in the result sequence according to the XML Output Method of the W3C XQuery/XSLT2 Serialization Draft Spec, with sequence normalization as defined therein.
`static String`	`WRAP_ALGORITHM` Serializes each item in the result sequence by wrapping it into a decorated element, without sequence normalization.

Constructor Summary

Constructors
Constructor and Description

ResultSequenceSerializer()
Constructs and returns a serializer with default options.

Constructors
Constructor and Description
`ResultSequenceSerializer()` Constructs and returns a serializer with default options.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`String`	`getAlgorithm()` Returns the current serialization algorithm; Can be `W3C_ALGORITHM` or `WRAP_ALGORITHM`; Defaults to `W3C_ALGORITHM`.
`String`	`getEncoding()` Returns the current serialization character encoding; Defaults to "UTF-8"; For details, see `Serializer.Serializer(OutputStream, String)`.
`int`	`getIndent()` Returns the number of spaces to insert for each nesting level for pretty printing purposes; Defaults to zero; For details, see `Serializer.setIndent(int)`.
`boolean`	`getUnicodeNormalizationFormC()` Returns whether or not to perform Unicode normalization form C (NFC); Defaults to false; For details, see `Serializer.setUnicodeNormalizationFormC(boolean)`
`void`	`setAlgorithm(String algorithm)` Sets the serialization algorithm.
`void`	`setEncoding(String encoding)` Sets the character encoding for the serialization.
`void`	`setIndent(int indent)` Sets the number of spaces to insert for each nesting level.
`void`	`setUnicodeNormalizationFormC(boolean nfc)` Sets whether or not to perform Unicode normalization form C (NFC).
`String`	`toString()` Returns a string representation for debugging purposes.
`void`	`write(nu.xom.Nodes nodes, OutputStream out)` Serializes the given result sequence onto the given output stream.

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

- Field Detail
  - W3C_ALGORITHM
```
public static final String W3C_ALGORITHM
```
    Serializes each item in the result sequence according to the XML Output Method of the W3C XQuery/XSLT2 Serialization Draft Spec, with sequence normalization as defined therein.
    
    See Also:
    
    Constant Field Values
  - WRAP_ALGORITHM
```
public static final String WRAP_ALGORITHM
```
    Serializes each item in the result sequence by wrapping it into a decorated element, without sequence normalization.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - ResultSequenceSerializer
```
public ResultSequenceSerializer()
```
    Constructs and returns a serializer with default options.
- Method Detail
  - getAlgorithm
```
public String getAlgorithm()
```
    Returns the current serialization algorithm; Can be W3C_ALGORITHM or WRAP_ALGORITHM; Defaults to W3C_ALGORITHM.
    
    Returns:
    
    the current algorithm
  - getIndent
```
public int getIndent()
```
    Returns the number of spaces to insert for each nesting level for pretty printing purposes; Defaults to zero; For details, see Serializer.setIndent(int).
    
    Returns:
    
    the current the number of spaces
  - getEncoding
```
public String getEncoding()
```
    Returns the current serialization character encoding; Defaults to "UTF-8"; For details, see Serializer.Serializer(OutputStream, String).
    
    Returns:
    
    the current encoding
  - getUnicodeNormalizationFormC
```
public boolean getUnicodeNormalizationFormC()
```
    Returns whether or not to perform Unicode normalization form C (NFC); Defaults to false; For details, see Serializer.setUnicodeNormalizationFormC(boolean)
    
    Returns:
    
    whether or not to perform NFC
  - setAlgorithm
```
public void setAlgorithm(String algorithm)
```
    Sets the serialization algorithm.
    
    Parameters:
    
    algorithm - the serialization algorithm to use
  - setEncoding
```
public void setEncoding(String encoding)
```
    Sets the character encoding for the serialization.
    
    Parameters:
    
    encoding - the encoding to use
  - setIndent
```
public void setIndent(int indent)
```
    Sets the number of spaces to insert for each nesting level.
    
    Parameters:
    
    indent - the indentation to use (must be >= 0)
  - setUnicodeNormalizationFormC
```
public void setUnicodeNormalizationFormC(boolean nfc)
```
    Sets whether or not to perform Unicode normalization form C (NFC).
    
    Parameters:
    
    nfc - true to normalize with NFC, false otherwise.
  - toString
```
public String toString()
```
    Returns a string representation for debugging purposes.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    a string representation
  - write
```
public void write(nu.xom.Nodes nodes,
                  OutputStream out)
           throws IOException
```
    Serializes the given result sequence onto the given output stream. This method does not auto-close the output stream.
    
    Parameters:
    
    nodes - the result sequence to serialize
    
    out - the stream to write to
    
    Throws:
    
    IOException - if an I/O error occured

Class ResultSequenceSerializer

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

W3C_ALGORITHM

WRAP_ALGORITHM

Constructor Detail

ResultSequenceSerializer

Method Detail

getAlgorithm

getIndent

getEncoding

getUnicodeNormalizationFormC

setAlgorithm

setEncoding

setIndent

setUnicodeNormalizationFormC

toString

write