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A PHP engine implemented in 100% Java
/*
* Copyright (c) 1998-2012 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.xml;
import com.caucho.util.CharBuffer;
import com.caucho.util.L10N;
import com.caucho.vfs.ReadStream;
import java.util.HashMap;
/**
* The Policy class defines the parsing policy. It configures the parser
* between HTML, XML, and loose versions of HTML and XML.
*/
class Policy {
static L10N L = new L10N(Policy.class);
final static int ERROR = 0;
final static int IGNORE = ERROR + 1;
final static int PUSH = IGNORE + 1;
final static int PUSH_EMPTY = PUSH + 1;
final static int PUSH_OPT = PUSH_EMPTY + 1;
final static int PUSH_VERBATIM = PUSH_OPT + 1;
final static int POP = PUSH_VERBATIM + 1;
final static int POP_AND_LOOP = POP + 1;
private NamespaceMap namespaces;
private HashMap nameCache = new HashMap();
private HashMap _attrCache = new HashMap();
protected QName opt;
protected ReadStream is;
boolean expandReferences = true;
boolean optionalTags = true;
boolean skipWhitespace;
boolean skipComments;
boolean strictComments;
boolean strictAttributes;
boolean entitiesAsText = false;
boolean expandEntities = true;
boolean strictCharacters;
boolean strictXml;
boolean singleTopElement;
boolean normalizeWhitespace = false;
boolean forgiving;
boolean _isNamespaceAware = false;
/**
* Initialize the policy.
*/
void init()
{
namespaces = null;
nameCache.clear();
_attrCache.clear();
opt = null;
is = null;
expandReferences = true;
optionalTags = true;
skipWhitespace = false;
skipComments = false;
strictComments = false;
strictAttributes = false;
entitiesAsText = false;
expandEntities = true;
strictCharacters = false;
strictXml = false;
singleTopElement = false;
normalizeWhitespace = false;
forgiving = false;
_isNamespaceAware = false;
}
/**
* Sets the current read stream.
*/
void setStream(ReadStream is)
{
this.is = is;
}
QName getOpt()
{
return opt;
}
/**
* Sets the new namespace binding.
*
* @param ns the namespace
*/
void setNamespace(NamespaceMap ns)
{
if (namespaces != ns) {
nameCache.clear();
_attrCache.clear();
}
namespaces = ns;
}
/**
* Set true for namespace aware.
*/
void setNamespaceAware(boolean isNamespaceAware)
{
_isNamespaceAware = isNamespaceAware;
}
/**
* Clears the namespace cache when the namespace changes.
*/
void clearNamespaceCache()
{
namespaces = null;
nameCache.clear();
_attrCache.clear();
}
QName getAttributeName(CharBuffer eltName, CharBuffer source)
{
return getAttributeName(eltName, source, false);
}
/**
* Returns the qname for the named attribute.
*
* @param eltName the current node
* @param source the name of the attribute
*
* @param the QName including namespace for the attribute name.
*/
QName getAttributeName(CharBuffer eltName, CharBuffer source, boolean nsNull)
{
QName qname = (QName) _attrCache.get(source);
if (qname != null)
return qname;
int i = source.lastIndexOf(':');
String fullName = source.toString();
String prefix = null;
String localName = null;
String ns = null;
if (! _isNamespaceAware) {
localName = fullName;
}
else if (i < 0) {
localName = fullName;
}
else {
prefix = source.substring(0, i);
ns = NamespaceMap.get(namespaces, prefix);
if (ns != null) {
localName = source.substring(i + 1);
}
else if ("xml".equals(prefix)) {
ns = XmlParser.XML;
localName = source.substring(i + 1);
}
else {
prefix = null;
localName = source.toString();
}
}
qname = new QName(fullName, prefix, localName, ns);
_attrCache.put(source.clone(), qname);
return qname;
}
/**
* Returns the fully qualified name, including namespaces, for the
* new qname.
*
* @param node the current parent node
* @param source the qname string needing resolving.
*
* @return the QName including namespace for the source.
*/
QName getName(CharBuffer source)
{
QName qname = (QName) nameCache.get(source);
if (qname != null)
return qname;
int i = source.lastIndexOf(':');
String fullName = source.toString();
String prefix = null;
String localName = null;
String ns = null;;
if (! _isNamespaceAware) {
}
else if (i < 0) {
ns = NamespaceMap.get(namespaces, "");
localName = source.toString();
}
else {
prefix = source.substring(0, i);
ns = NamespaceMap.get(namespaces, prefix);
if (ns != null) {
localName = source.substring(i + 1);
}
else {
prefix = null;
localName = source.toString();
}
}
qname = new QName(fullName, prefix, localName, ns);
nameCache.put(source.clone(), qname);
return qname;
}
/**
* Returns the fully qualified name, including namespaces, for the
* new qname.
*
* @param source the qname string needing resolving.
*
* @return the QName including namespace for the source.
*/
QName getNamespaceName(CharBuffer source)
{
QName qname = (QName) nameCache.get(source);
if (qname != null)
return qname;
int i = source.lastIndexOf(':');
String prefix;
String localName;
// xml/01ek
if (true) {
prefix = null;
localName = source.toString();
}
else if (i < 0) {
prefix = null;
localName = source.toString();
}
else {
prefix = source.substring(0, i);
localName = source.substring(i + 1);
}
// xml/01ek vs xml/01eg
qname = new QName(prefix, localName, null); // XmlParser.XMLNS
nameCache.put(source.clone(), qname);
return qname;
}
/**
* Returns true if the string contains only whitespace.
*
* @param s string to test
* @return true if the string is completely whitespace
*/
boolean isWhitespaceOnly(String s)
{
for (int i = s.length() - 1; i >= 0; i--)
if (! XmlChar.isWhitespace(s.charAt(i)))
return false;
return true;
}
/**
* Returns the action to be performed with the next node on an open
* tag. In general, for XML, the next node is just pushed into the tree.
*
* @param parser the current XML parser
* @param node the current node
* @param next the node that needs an action
*
* @return the action code for the next node
*/
int openAction(XmlParser parser, QName node, QName next)
throws XmlParseException
{
String nodeName = node.getName();
/*
if (nodeName.equals("#document")) {
QDocument document = (QDocument) node;
switch (next.getNodeType()) {
case Node.TEXT_NODE:
if (isWhitespaceOnly(next.getNodeValue()))
return PUSH; // XXX: ignore
break;
case Node.COMMENT_NODE:
case Node.PROCESSING_INSTRUCTION_NODE:
return PUSH;
}
if (document.getDocumentElement() == null &&
next.getNodeType() == Node.ELEMENT_NODE) {
document.setDocumentElement((Element) next);
return PUSH;
}
Element elt = document.getDocumentElement();
return PUSH;
} else
return PUSH;
*/
return PUSH;
}
/**
* Returns the action to be performed with the next node on a close
* tag. In general, for XML, the current node is changed to its parent
*
* @param parser the current XML parser
* @param node the current node
* @param tagEnd the name of the close tag
*
* @return the action code for the next node
*/
int elementCloseAction(XmlParser parser, QName node, String tagEnd)
throws XmlParseException
{
String nodeName = node.getName();
if (nodeName.equals("#document") && tagEnd.equals(""))
return POP;
else if (nodeName.equals(tagEnd))
return POP;
else {
String expect = nodeName;
if (expect.equals("#document"))
expect = L.l("end of document");
else
expect = "`'";
if (tagEnd.equals(""))
tagEnd = L.l("end of file");
else
tagEnd = "`'";
throw parser.error(L.l("expected {0} at {1}", expect, tagEnd));
}
}
}