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The XSLT and XQuery Processor
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2022 Saxonica Limited
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
package net.sf.saxon.tree.tiny;
import net.sf.saxon.event.CopyNamespaceSensitiveException;
import net.sf.saxon.event.Receiver;
import net.sf.saxon.event.ReceiverOption;
import net.sf.saxon.om.*;
import net.sf.saxon.pattern.NodePredicate;
import net.sf.saxon.pattern.NodeTest;
import net.sf.saxon.s9api.Location;
import net.sf.saxon.str.UnicodeString;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.tree.iter.*;
import net.sf.saxon.tree.util.Navigator;
import net.sf.saxon.type.SchemaType;
import net.sf.saxon.type.Type;
import net.sf.saxon.type.Untyped;
import net.sf.saxon.value.StringValue;
import javax.xml.transform.SourceLocator;
import java.util.ArrayList;
import java.util.List;
/**
* An element node in the TinyTree that has no attributes or namespace declarations and that
* has a single text node child. The element-and-text-node pair are represented by a single
* entry in the node arrays, but materialize as two separate objects when turned into node
* objects.
*/
public class TinyTextualElement extends TinyElementImpl {
private TinyTextualElementText textNode = null;
public TinyTextualElement(TinyTree tree, int nodeNr) {
super(tree, nodeNr);
}
@Override
public NamespaceBinding[] getDeclaredNamespaces(NamespaceBinding[] buffer) {
return NamespaceBinding.EMPTY_ARRAY;
}
@Override
public NamespaceMap getAllNamespaces() {
TinyNodeImpl parent = getParent();
if (parent instanceof TinyElementImpl) {
return parent.getAllNamespaces();
} else {
return NamespaceMap.emptyMap();
}
}
@Override
public String getAttributeValue(String uri, String local) {
return null;
}
@Override
public String getAttributeValue(int fp) {
return null;
}
@Override
public void copy(Receiver receiver, int copyOptions, Location location) throws XPathException {
boolean typed = CopyOptions.includes(copyOptions, CopyOptions.TYPE_ANNOTATIONS);
SchemaType type = typed ? getSchemaType() : Untyped.getInstance();
boolean disallowNamespaceSensitiveContent =
((copyOptions & CopyOptions.TYPE_ANNOTATIONS) != 0) &&
((copyOptions & CopyOptions.ALL_NAMESPACES) == 0);
if (disallowNamespaceSensitiveContent) {
try {
checkNotNamespaceSensitiveElement(type, nodeNr);
} catch (CopyNamespaceSensitiveException e) {
e.setErrorCode(receiver.getPipelineConfiguration().isXSLT() ? "XTTE0950" : "XQTY0086");
throw e;
}
}
java.util.function.Function informee = receiver.getPipelineConfiguration().getCopyInformee();
if (informee != null) {
Object o = informee.apply(this);
if (o instanceof Location) {
location = (Location) o;
}
}
NamespaceMap namespaces;
if ((copyOptions & CopyOptions.ALL_NAMESPACES) != 0) {
// Don't bother with LOCAL_NAMESPACES because there aren't any
namespaces = getAllNamespaces();
} else {
namespaces = NamespaceMap.emptyMap();
}
receiver.startElement(NameOfNode.makeName(this), type, EmptyAttributeMap.getInstance(),
namespaces, location, ReceiverOption.NONE);
receiver.characters(getUnicodeStringValue(), location, ReceiverOption.NONE);
receiver.endElement();
}
@Override
public boolean hasChildNodes() {
return true;
}
@Override
public UnicodeString getUnicodeStringValue() {
return TinyTextImpl.getStringValue(tree, nodeNr);
}
@Override
public AxisIterator iterateAxis(int axisNumber) {
switch (axisNumber) {
case AxisInfo.ATTRIBUTE:
return EmptyIterator.ofNodes();
case AxisInfo.CHILD:
case AxisInfo.DESCENDANT:
return SingleNodeIterator.makeIterator(getTextNode());
case AxisInfo.DESCENDANT_OR_SELF:
return new ArrayIterator.OfNodes(new NodeInfo[]{this, getTextNode()});
default:
return super.iterateAxis(axisNumber);
}
}
@Override
public AxisIterator iterateAxis(int axisNumber, NodePredicate nodeTest) {
switch (axisNumber) {
case AxisInfo.ATTRIBUTE:
return EmptyIterator.ofNodes();
case AxisInfo.CHILD:
case AxisInfo.DESCENDANT:
return Navigator.filteredSingleton(getTextNode(), nodeTest);
case AxisInfo.DESCENDANT_OR_SELF:
List list = new ArrayList<>(2);
if (nodeTest.test(this)) {
list.add(this);
}
if (nodeTest.test(getTextNode())) {
list.add(getTextNode());
}
return new NodeListIterator(list);
default:
return super.iterateAxis(axisNumber, nodeTest);
}
}
@Override
public boolean isAncestorOrSelf(TinyNodeImpl d) {
return this.equals(d);
}
/**
* Make an instance of the text node
*
* @return the new or existing instance
*/
/*@Nullable*/
public TinyTextualElementText getTextNode() {
if (textNode == null) {
textNode = new TinyTextualElementText(this);
}
return textNode;
}
/**
* Inner class representing the text node; this is created on demand
*/
public static class TinyTextualElementText implements NodeInfo, SourceLocator {
private final TinyTextualElement element;
public TinyTextualElementText(TinyTextualElement element) {
this.element = element;
}
/**
* Ask whether this NodeInfo implementation holds a fingerprint identifying the name of the
* node in the NamePool. If the answer is true, then the {@link #getFingerprint} method must
* return the fingerprint of the node. If the answer is false, then the {@link #getFingerprint}
* method should throw an {@code UnsupportedOperationException}. In the case of unnamed nodes
* such as text nodes, the result can be either true (in which case getFingerprint() should
* return -1) or false (in which case getFingerprint may throw an exception).
*
* @return true if the implementation of this node provides fingerprints.
* @since 9.8; previously Saxon relied on using FingerprintedNode as a marker interface.
*/
@Override
public boolean hasFingerprint() {
return true;
}
/**
* Get information about the tree to which this NodeInfo belongs
*
* @return the TreeInfo
* @since 9.7
*/
@Override
public TreeInfo getTreeInfo() {
return element.getTreeInfo();
}
/**
* Set the system ID for the entity containing the node.
*/
@Override
public void setSystemId(String systemId) {
}
/**
* Return the type of node.
*
* @return Type.TEXT (always)
*/
@Override
public final int getNodeKind() {
return Type.TEXT;
}
/**
* Get the value of the item as a UnicodeString.
* @return the string value of the text node
*/
@Override
public UnicodeString getUnicodeStringValue() {
return element.getUnicodeStringValue();
}
/**
* Determine whether this is the same node as another node
*
* @return true if this Node object and the supplied Node object represent the
* same node in the tree.
*/
public boolean equals(Object other) {
return other instanceof TinyTextualElementText &&
getParent().equals(((TinyTextualElementText)other).getParent());
}
@Override
public int hashCode() {
return getParent().hashCode() ^ 0x01010101;
}
/**
* Get a character string that uniquely identifies this node
*/
@Override
public void generateId(/*@NotNull*/ StringBuilder buffer) {
element.generateId(buffer);
buffer.append("T");
}
/**
* Get the system ID for the entity containing the node.
*/
/*@Nullable*/
@Override
public String getSystemId() {
return element.getSystemId();
}
/**
* Get the base URI for the node. Default implementation for child nodes gets
* the base URI of the parent node.
*/
@Override
public String getBaseURI() {
return element.getBaseURI();
}
/**
* Determine the relative position of this node and another node, in document order.
* The other node will always be in the same document.
*
* @param other The other node, whose position is to be compared with this node
* @return -1 if this node precedes the other node, +1 if it follows the other
* node, or 0 if they are the same node. (In this case, isSameNode() will always
* return true, and the two nodes will produce the same result for generateId())
*/
@Override
public int compareOrder(NodeInfo other) {
if (other.equals(this)) {
return 0;
} else if (other.equals(getParent())) {
return 1;
} else {
return getParent().compareOrder(other);
}
}
/**
* Get the fingerprint of the node, used for matching names
*/
@Override
public int getFingerprint() {
return -1;
}
/**
* Get the prefix part of the name of this node. This is the name before the ":" if any.
*
* @return the prefix part of the name. For an unnamed node, return "".
*/
/*@NotNull*/
@Override
public String getPrefix() {
return "";
}
/**
* Get the URI part of the name of this node. This is the URI corresponding to the
* prefix, or the URI of the default namespace if appropriate.
*
* @return The URI of the namespace of this node. For an unnamed node, or for
* an element or attribute in the default namespace, return an empty string.
*/
/*@NotNull*/
@Override
public String getURI() {
return "";
}
/**
* Get the display name of this node. For elements and attributes this is [prefix:]localname.
* For unnamed nodes, it is an empty string.
*
* @return The display name of this node.
* For a node with no name, return an empty string.
*/
/*@NotNull*/
@Override
public String getDisplayName() {
return "";
}
/**
* Get the local name of this node.
*
* @return The local name of this node.
* For a node with no name, return "".
*/
/*@NotNull*/
@Override
public String getLocalPart() {
return "";
}
/**
* Determine whether the node has any children.
*
* @return true if this node has any attributes,
* false otherwise.
*/
@Override
public boolean hasChildNodes() {
return false;
}
/**
* Get the string value of a given attribute of this node
*
* @param uri the namespace URI of the attribute name. Supply the empty string for an attribute
* that is in no namespace
* @param local the local part of the attribute name.
* @return the attribute value if it exists, or null if it does not exist. Always returns null
* if this node is not an element.
* @since 9.4
*/
@Override
public String getAttributeValue(/*@NotNull*/ String uri, /*@NotNull*/ String local) {
return null;
}
/**
* Get line number
*
* @return the line number of the node in its original source document; or
* -1 if not available
*/
@Override
public int getLineNumber() {
return getParent().getLineNumber();
}
/**
* Return the character position where the current document event ends.
* Warning: The return value from the method
* is intended only as an approximation for the sake of error
* reporting; it is not intended to provide sufficient information
* to edit the character content of the original XML document.
* The return value is an approximation of the column number
* in the document entity or external parsed entity where the
* markup that triggered the event appears.
*
* @return The column number, or -1 if none is available.
* @see #getLineNumber
*/
@Override
public int getColumnNumber() {
return getParent().getColumnNumber();
}
/**
* Get an immutable copy of this Location object. By default Location objects may be mutable, so they
* should not be saved for later use. The result of this operation holds the same location information,
* but in an immutable form.
*/
@Override
public Location saveLocation() {
return this;
}
/**
* Get the type annotation of this node, if any. The type annotation is represented as
* SchemaType object.
* Types derived from a DTD are not reflected in the result of this method.
*
* @return For element and attribute nodes: the type annotation derived from schema
* validation (defaulting to xs:untyped and xs:untypedAtomic in the absence of schema
* validation). For comments, text nodes, processing instructions, and namespaces: null.
* For document nodes, either xs:untyped if the document has not been validated, or
* xs:anyType if it has.
* @since 9.4
*/
@Override
public SchemaType getSchemaType() {
return null;
}
/**
* Get all namespace undeclarations and undeclarations defined on this element.
*
* @param buffer If this is non-null, and the result array fits in this buffer, then the result
* may overwrite the contents of this array, to avoid the cost of allocating a new array on the heap.
* @return An array of integers representing the namespace declarations and undeclarations present on
* this element. For a node other than an element, return null. Otherwise, the returned array is a
* sequence of namespace codes, whose meaning may be interpreted by reference to the name pool. The
* top half word of each namespace code represents the prefix, the bottom half represents the URI.
* If the bottom half is zero, then this is a namespace undeclaration rather than a declaration.
* The XML namespace is never included in the list. If the supplied array is larger than required,
* then the first unused entry will be set to -1.
* For a node other than an element, the method returns null.
*/
/*@Nullable*/
@Override
public NamespaceBinding[] getDeclaredNamespaces(NamespaceBinding[] buffer) {
return null;
}
/**
* Get all the namespace bindings that are in-scope for this element.
* For an element return all the prefix-to-uri bindings that are in scope. This may include
* a binding to the default namespace (represented by a prefix of ""). It will never include
* "undeclarations" - that is, the namespace URI will never be empty; the effect of an undeclaration
* is to remove a binding from the in-scope namespaces, not to add anything.
* For a node other than an element, returns null.
*
* @return the in-scope namespaces for an element, or null for any other kind of node.
*/
@Override
public NamespaceMap getAllNamespaces() {
return null;
}
/**
* Get the typed value.
*
* @return the typed value. If requireSingleton is set to true, the result will always be an
* AtomicValue. In other cases it may be a Value representing a sequence whose items are atomic
* values.
* @since 8.5
*/
/*@NotNull*/
@Override
public AtomicSequence atomize() throws XPathException {
return StringValue.makeUntypedAtomic(getUnicodeStringValue());
}
/**
* Return an enumeration over the nodes reached by the given axis from this node
*
* @param axisNumber the axis to be iterated over
* @return a AxisIterator that scans the nodes reached by the axis in turn.
*/
/*@NotNull*/
@Override
public AxisIterator iterateAxis(int axisNumber) {
switch (axisNumber) {
case AxisInfo.ANCESTOR:
return element.iterateAxis(AxisInfo.ANCESTOR_OR_SELF);
case AxisInfo.PRECEDING_OR_ANCESTOR:
return new Navigator.PrecedingEnumeration(this, true);
case AxisInfo.ANCESTOR_OR_SELF:
return new PrependAxisIterator(this, getParent().iterateAxis(AxisInfo.ANCESTOR_OR_SELF));
case AxisInfo.FOLLOWING:
return new Navigator.FollowingEnumeration(this);
case AxisInfo.PRECEDING:
return new Navigator.PrecedingEnumeration(this, false);
case AxisInfo.PARENT:
return SingleNodeIterator.makeIterator(getParent());
case AxisInfo.ATTRIBUTE:
case AxisInfo.CHILD:
case AxisInfo.DESCENDANT:
case AxisInfo.FOLLOWING_SIBLING:
case AxisInfo.NAMESPACE:
case AxisInfo.PRECEDING_SIBLING:
return EmptyIterator.ofNodes();
case AxisInfo.SELF:
case AxisInfo.DESCENDANT_OR_SELF:
return SingleNodeIterator.makeIterator(this);
default:
throw new IllegalArgumentException("Unknown axis number " + axisNumber);
}
}
/**
* Return an enumeration over the nodes reached by the given axis from this node
*
* @param axisNumber the axis to be iterated over
* @param predicate A pattern to be matched by the returned nodes
* @return a AxisIterator that scans the nodes reached by the axis in turn.
*/
/*@NotNull*/
@Override
public AxisIterator iterateAxis(int axisNumber, NodePredicate predicate) {
NodeTest nodeTest = Navigator.nodeTestFromPredicate(predicate);
switch (axisNumber) {
case AxisInfo.ANCESTOR:
return getParent().iterateAxis(AxisInfo.ANCESTOR_OR_SELF, nodeTest);
case AxisInfo.PRECEDING_OR_ANCESTOR:
return new Navigator.AxisFilter(
new Navigator.PrecedingEnumeration(this, true),
nodeTest);
case AxisInfo.ANCESTOR_OR_SELF:
return new Navigator.AxisFilter(
new PrependAxisIterator(this, getParent().iterateAxis(AxisInfo.ANCESTOR_OR_SELF)),
nodeTest);
case AxisInfo.FOLLOWING:
return new Navigator.AxisFilter(
new Navigator.FollowingEnumeration(this),
nodeTest);
case AxisInfo.PRECEDING:
return new Navigator.AxisFilter(
new Navigator.PrecedingEnumeration(this, false),
nodeTest);
case AxisInfo.PARENT:
return Navigator.filteredSingleton(getParent(), nodeTest);
case AxisInfo.ATTRIBUTE:
case AxisInfo.CHILD:
case AxisInfo.DESCENDANT:
case AxisInfo.FOLLOWING_SIBLING:
case AxisInfo.NAMESPACE:
case AxisInfo.PRECEDING_SIBLING:
return EmptyIterator.ofNodes();
case AxisInfo.SELF:
case AxisInfo.DESCENDANT_OR_SELF:
return Navigator.filteredSingleton(this, nodeTest);
default:
throw new IllegalArgumentException("Unknown axis number " + axisNumber);
}
}
/**
* Find the parent node of this node.
*
* @return The Node object describing the containing element or root node.
*/
/*@NotNull*/
@Override
public NodeInfo getParent() {
return element;
}
/**
* Get the root node
*
* @return the NodeInfo representing the root of this tree
*/
/*@NotNull*/
@Override
public NodeInfo getRoot() {
return element.getRoot();
}
/**
* Copy the node to a given Outputter
*/
@Override
public void copy(/*@NotNull*/ Receiver out, int copyOptions, Location locationId)
throws XPathException {
out.characters(getUnicodeStringValue(), locationId, ReceiverOption.NONE);
}
}
}