org.hippoecm.hst.util
Class DOMElementWriter

java.lang.Object
  org.hippoecm.hst.util.DOMElementWriter

public class DOMElementWriter
extends Object

Writes a DOM tree to a given Writer. warning: this utility currently does not declare XML Namespaces.

Version:

$Id: DOMElementWriter.java 18593 2009-06-16 13:18:12Z wko $

Nested Class Summary

static class

DOMElementWriter.XmlNamespacePolicy Whether namespaces should be ignored for elements and attributes.

Field Summary

protected String[]

knownEntities Don't try to be too smart but at least recognize the predefined entities.

Constructor Summary

DOMElementWriter()
Create an element writer.

DOMElementWriter(boolean xmlDeclaration)
Create an element writer XML namespaces will be ignored.

DOMElementWriter(boolean xmlDeclaration, DOMElementWriter.XmlNamespacePolicy namespacePolicy)
Create an element writer XML namespaces will be ignored.

Method Summary

void	closeElement(Element element, Writer out, int indent, String indentWith, boolean hasChildren) Writes a DOM tree to a stream.
String	encode(String value) Escape <, > & ', " as their entities and drop characters that are illegal in XML documents.
String	encodedata(String value) Drop characters that are illegal in XML documents.
String	encodetext(String value) Escape <, > & as their entities and drop characters that are illegal in XML documents.
boolean	isLegalCharacter(char c) Is the given character allowed inside an XML document?
boolean	isReference(String ent) Is the given argument a character or entity reference?
void	openElement(Element element, Writer out, int indent, String indentWith) Writes the opening tag - including all attributes - corresponding to a DOM element.
void	openElement(Element element, Writer out, int indent, String indentWith, boolean hasChildren) Writes the opening tag - including all attributes - corresponding to a DOM element.
void	write(Element root, OutputStream out) Writes a DOM tree to a stream in UTF8 encoding.
void	write(Element element, Writer out, int indent, String indentWith) Writes a DOM tree to a stream.
void	writeXMLDeclaration(Writer wri) Writes the XML declaration if xmlDeclaration is true.

Methods inherited from class java.lang.Object

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

Field Detail

knownEntities

protected String[] knownEntities

Don't try to be too smart but at least recognize the predefined entities.

Constructor Detail

DOMElementWriter

public DOMElementWriter()

Create an element writer. The ?xml? declaration will be included, namespaces ignored.

DOMElementWriter

public DOMElementWriter(boolean xmlDeclaration)

Create an element writer XML namespaces will be ignored.

Parameters:

xmlDeclaration - flag to indicate whether the ?xml? declaration should be included.

DOMElementWriter

public DOMElementWriter(boolean xmlDeclaration,
                        DOMElementWriter.XmlNamespacePolicy namespacePolicy)

Create an element writer XML namespaces will be ignored.

Parameters:

xmlDeclaration - flag to indicate whether the ?xml? declaration should be included.

namespacePolicy - the policy to use.

Method Detail

write

public void write(Element root,
                  OutputStream out)
           throws IOException

Writes a DOM tree to a stream in UTF8 encoding. Note that it prepends the <?xml version='1.0' encoding='UTF-8'?> if the xmlDeclaration field is true. The indent number is set to 0 and a 2-space indent.

Parameters:

root - the root element of the DOM tree.

out - the outputstream to write to.

Throws:

IOException - if an error happens while writing to the stream.

writeXMLDeclaration

public void writeXMLDeclaration(Writer wri)
                         throws IOException

Writes the XML declaration if xmlDeclaration is true.

Parameters:

wri - the writer to write to.

Throws:

IOException - if there is an error.

write

public void write(Element element,
                  Writer out,
                  int indent,
                  String indentWith)
           throws IOException

Writes a DOM tree to a stream.

Parameters:

element - the Root DOM element of the tree

out - where to send the output

indent - number of

indentWith - string that should be used to indent the corresponding tag.

Throws:

IOException - if an error happens while writing to the stream.

openElement

public void openElement(Element element,
                        Writer out,
                        int indent,
                        String indentWith)
                 throws IOException

Writes the opening tag - including all attributes - corresponding to a DOM element.

Parameters:

element - the DOM element to write

out - where to send the output

indent - number of

indentWith - string that should be used to indent the corresponding tag.

Throws:

IOException - if an error happens while writing to the stream.

openElement

public void openElement(Element element,
                        Writer out,
                        int indent,
                        String indentWith,
                        boolean hasChildren)
                 throws IOException

Writes the opening tag - including all attributes - corresponding to a DOM element.

Parameters:

element - the DOM element to write

out - where to send the output

indent - number of

indentWith - string that should be used to indent the corresponding tag.

hasChildren - whether this element has children.

Throws:

IOException - if an error happens while writing to the stream.

closeElement

public void closeElement(Element element,
                         Writer out,
                         int indent,
                         String indentWith,
                         boolean hasChildren)
                  throws IOException

Writes a DOM tree to a stream.

Parameters:

element - the Root DOM element of the tree

out - where to send the output

indent - number of

indentWith - string that should be used to indent the corresponding tag.

hasChildren - if true indent.

Throws:

IOException - if an error happens while writing to the stream.

encode

public String encode(String value)

Escape <, > & ', " as their entities and drop characters that are illegal in XML documents.

Parameters:

value - the string to encode.

Returns:

the encoded string.

encodetext

public String encodetext(String value)

Escape <, > & as their entities and drop characters that are illegal in XML documents.

Parameters:

value - the string to encode.

Returns:

the encoded string.

encodedata

public String encodedata(String value)

Drop characters that are illegal in XML documents.

Also ensure that we are not including an ]]> marker by replacing that sequence with ]]>.

See XML 1.0 2.2 http://www.w3.org/TR/1998/REC-xml-19980210#charsets and 2.7 http://www.w3.org/TR/1998/REC-xml-19980210#sec-cdata-sect.

Parameters:

value - the value to be encoded.

Returns:

the encoded value.

isReference

public boolean isReference(String ent)

Is the given argument a character or entity reference?

Parameters:

ent - the value to be checked.

Returns:

true if it is an entity.

isLegalCharacter

public boolean isLegalCharacter(char c)

Is the given character allowed inside an XML document?

See XML 1.0 2.2 http://www.w3.org/TR/1998/REC-xml-19980210#charsets.

Parameters:

c - the character to test.

Returns:

true if the character is allowed.