package net.sf.saxon.tinytree;
import net.sf.saxon.event.LocationProvider;
import net.sf.saxon.om.AttributeCollection;
import net.sf.saxon.om.NamePool;
import net.sf.saxon.om.StandardNames;
/**
* An implementation of the AttributeCollection interface based directly on the
* TinyTree data structure.
*/
public class TinyAttributeCollection implements AttributeCollection {
int element;
TinyTree tree;
int firstAttribute;
public TinyAttributeCollection(TinyTree tree, int element) {
this.tree = tree;
this.element = element;
firstAttribute = tree.alpha[element];
}
/**
* Set the location provider. This must be set if the methods getSystemId() and getLineNumber()
* are to be used to get location information for an attribute.
*/
public void setLocationProvider(LocationProvider provider) {
//
}
/**
* Return the number of attributes in the list.
*
* @return The number of attributes in the list.
*/
public int getLength() {
int i = firstAttribute;
while (i < tree.numberOfAttributes && tree.attParent[i] == element) {
i++;
}
return i - firstAttribute;
}
/**
* Get the namecode of an attribute (by position).
*
* @param index The position of the attribute in the list.
* @return The display name of the attribute as a string, or null if there
* is no attribute at that position.
*/
public int getNameCode(int index) {
return tree.attCode[firstAttribute + index];
}
/**
* Get the type annotation of an attribute (by position).
*
* @param index The position of the attribute in the list.
* @return The type annotation of the attribute as the fingerprint of the type name.
* The bit {@link net.sf.saxon.om.NodeInfo#IS_DTD_TYPE} represents a DTD-derived type.
*/
public int getTypeAnnotation(int index) {
if (tree.attTypeCode == null) {
return StandardNames.XS_UNTYPED_ATOMIC;
}
return tree.attTypeCode[firstAttribute + index];
}
/**
* Get the locationID of an attribute (by position)
*
* @param index The position of the attribute in the list.
* @return The location identifier of the attribute. This can be supplied
* to a {@link net.sf.saxon.event.LocationProvider} in order to obtain the
* actual system identifier and line number of the relevant location
*/
public int getLocationId(int index) {
return 0;
}
/**
* Get the systemId part of the location of an attribute, at a given index.
* <p/>
* <p>Attribute location information is not available from a SAX parser, so this method
* is not useful for getting the location of an attribute in a source document. However,
* in a Saxon result document, the location information represents the location in the
* stylesheet of the instruction used to generate this attribute, which is useful for
* debugging.</p>
*
* @param index the required attribute
* @return the systemId of the location of the attribute
*/
public String getSystemId(int index) {
return tree.getSystemId(element);
}
/**
* Get the line number part of the location of an attribute, at a given index.
* <p/>
* <p>Attribute location information is not available from a SAX parser, so this method
* is not useful for getting the location of an attribute in a source document. However,
* in a Saxon result document, the location information represents the location in the
* stylesheet of the instruction used to generate this attribute, which is useful for
* debugging.</p>
*
* @param index the required attribute
* @return the line number of the location of the attribute
*/
public int getLineNumber(int index) {
return -1;
}
/**
* Get the properties of an attribute (by position)
*
* @param index The position of the attribute in the list.
* @return The properties of the attribute. This is a set
* of bit-settings defined in class {@link net.sf.saxon.event.ReceiverOptions}. The
* most interesting of these is {{@link net.sf.saxon.event.ReceiverOptions#DEFAULTED_ATTRIBUTE},
* which indicates an attribute that was added to an element as a result of schema validation.
*/
public int getProperties(int index) {
return 0;
}
/**
* Get the prefix of the name of an attribute (by position).
*
* @param index The position of the attribute in the list.
* @return The prefix of the attribute name as a string, or null if there
* is no attribute at that position. Returns "" for an attribute that
* has no prefix.
*/
public String getPrefix(int index) {
return tree.getNamePool().getPrefix(getNameCode(index));
}
/**
* Get the lexical QName of an attribute (by position).
*
* @param index The position of the attribute in the list.
* @return The lexical QName of the attribute as a string, or null if there
* is no attribute at that position.
*/
public String getQName(int index) {
return tree.getNamePool().getDisplayName(getNameCode(index));
}
/**
* Get the local name of an attribute (by position).
*
* @param index The position of the attribute in the list.
* @return The local name of the attribute as a string, or null if there
* is no attribute at that position.
*/
public String getLocalName(int index) {
return tree.getNamePool().getLocalName(getNameCode(index));
}
/**
* Get the namespace URI of an attribute (by position).
*
* @param index The position of the attribute in the list.
* @return The local name of the attribute as a string, or null if there
* is no attribute at that position.
*/
public String getURI(int index) {
return tree.getNamePool().getURI(getNameCode(index));
}
/**
* Get the index of an attribute (by name).
*
* @param uri The namespace uri of the attribute.
* @param localname The local name of the attribute.
* @return The index position of the attribute, or -1 if there is no attribute with this name
*/
public int getIndex(String uri, String localname) {
int fingerprint = tree.getNamePool().getFingerprint(uri, localname);
return getIndexByFingerprint(fingerprint);
}
/**
* Get the index, given the fingerprint
* @param fingerprint the NamePool fingerprint of the required attribute name
* @return The index position of the attribute, or -1 if there is no attribute with this name
*/
public int getIndexByFingerprint(int fingerprint) {
int i = firstAttribute;
while (tree.attParent[i] == element) {
if ((tree.attCode[i] & NamePool.FP_MASK) == fingerprint) {
return i - firstAttribute;
}
i++;
}
return -1;
}
/**
* Get the attribute value using its fingerprint
*/
public String getValueByFingerprint(int fingerprint) {
return getValue(getIndexByFingerprint(fingerprint));
}
/**
* Get the value of an attribute (by name).
*
* @param uri The namespace uri of the attribute.
* @param localname The local name of the attribute.
* @return The index position of the attribute
*/
public String getValue(String uri, String localname) {
return getValue(getIndex(uri, localname));
}
/**
* Get the value of an attribute (by position).
*
* @param index The position of the attribute in the list.
* @return The attribute value as a string, or null if
* there is no attribute at that position.
*/
public String getValue(int index) {
CharSequence cs = tree.attValue[firstAttribute + index];
return (cs==null ? null : cs.toString());
}
/**
* Determine whether a given attribute has the is-ID property set
*/
public boolean isId(int index) {
return ((getTypeAnnotation(index) & NamePool.FP_MASK) == StandardNames.XS_ID) ||
((getNameCode(index) & NamePool.FP_MASK) == StandardNames.XML_ID);
}
/**
* Determine whether a given attribute has the is-idref property set
*/
public boolean isIdref(int index) {
return ((getTypeAnnotation(index) & NamePool.FP_MASK) == StandardNames.XS_IDREF) ||
((getTypeAnnotation(index) & NamePool.FP_MASK) == StandardNames.XS_IDREFS);
}
}
//
// The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
// you may not use this file except in compliance with the License. You may obtain a copy of the
// License at http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is Michael H. Kay
//
// Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
//
// Contributor(s): none.
//
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