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The XSLT and XQuery Processor
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2023 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.linked;
import net.sf.saxon.Configuration;
import net.sf.saxon.event.Builder;
import net.sf.saxon.om.*;
import net.sf.saxon.pattern.AnyNodeTest;
import net.sf.saxon.pattern.NameTest;
import net.sf.saxon.pattern.NodePredicate;
import net.sf.saxon.pattern.NodeTest;
import net.sf.saxon.s9api.Location;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.tree.NamespaceNode;
import net.sf.saxon.tree.iter.AxisIterator;
import net.sf.saxon.tree.iter.EmptyIterator;
import net.sf.saxon.tree.util.Navigator;
import net.sf.saxon.tree.util.SteppingNavigator;
import net.sf.saxon.tree.util.SteppingNode;
import net.sf.saxon.tree.wrapper.SiblingCountingNode;
import net.sf.saxon.type.*;
import net.sf.saxon.value.StringValue;
/**
* A node in the "linked" tree representing any kind of node except a namespace node.
* Specific node kinds are represented by concrete subclasses.
*
*/
public abstract class NodeImpl
implements MutableNodeInfo, SteppingNode, SiblingCountingNode, Location {
/*@Nullable*/ private ParentNodeImpl parent;
private int index; // Set to -1 when the node is deleted
/**
* Chararacteristic letters to identify each type of node, indexed using the node type
* values. These are used as the initial letter of the result of generate-id()
*/
/*@NotNull*/ public static final char[] NODE_LETTER =
{'x', 'e', 'a', 't', 'x', 'x', 'x', 'p', 'c', 'r', 'x', 'x', 'x', 'n'};
/**
* To implement {@link Sequence}, this method returns the item itself
*
* @return this item
*/
@Override
public NodeImpl head() {
return this;
}
/**
* To implement {@link Sequence}, this method returns a singleton iterator
* that delivers this item in the form of a sequence
*
* @return a singleton iterator that returns this item
*/
//
// public SingletonIterator iterate() {
// return SingletonIterator.makeIterator(this);
// }
/**
* Get information about the tree to which this NodeInfo belongs
*
* @return the TreeInfo
* @since 9.7
*/
@Override
public TreeInfo getTreeInfo() {
return getPhysicalRoot();
}
/**
* Get the type annotation
*
* @return the type annotation of the base node
*/
@Override
public SchemaType getSchemaType() {
return Untyped.getInstance();
}
/**
* Get the column number of the node.
* The default implementation returns -1, meaning unknown
*/
@Override
public int getColumnNumber() {
if (parent == null) {
return -1;
} else {
return parent.getColumnNumber();
}
}
/**
* Get the index position of this node among its siblings (starting from 0)
*
* @return 0 for the first child, 1 for the second child, etc. Returns -1 for a node
* that has been deleted.
*/
@Override
public final int getSiblingPosition() {
return index;
}
/**
* Set the index position. For internal use only
*
* @param index the position of the node among its siblings, counting from zero.
*/
protected final void setSiblingPosition(int index) {
this.index = index;
}
/**
* 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
*/
@Override
public AtomicSequence atomize() throws XPathException {
SchemaType stype = getSchemaType();
if (stype == Untyped.getInstance() || stype == BuiltInAtomicType.UNTYPED_ATOMIC) {
return StringValue.makeUntypedAtomic(getUnicodeStringValue());
} else {
return stype.atomize(this);
}
}
/**
* Set the system ID of this node. This method is provided so that a NodeInfo
* implements the javax.xml.transform.Source interface, allowing a node to be
* used directly as the Source of a transformation
*/
@Override
public void setSystemId(String uri) {
// overridden in DocumentImpl and ElementImpl
NodeInfo p = getParent();
if (p != null) {
p.setSystemId(uri);
}
}
/**
* Determine whether this is the same node as another node
*
* @return true if the argument is the same node in the tree.
*/
public boolean equals(Object other) {
// default implementation: differs for attribute and namespace nodes
return this == other;
}
@Override
public int hashCode() {
return System.identityHashCode(this);
}
/**
* Get the name of the node. Returns null for an unnamed node
*
* @return the name of the node
*/
public NodeName getNodeName() {
return null;
}
/**
* 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 the fingerprint of the node. This is used to compare whether two nodes
* have equivalent names. Return -1 for a node with no name.
*/
@Override
public int getFingerprint() {
NodeName name = getNodeName();
if (name == null) {
return -1;
} else {
return name.obtainFingerprint(getConfiguration().getNamePool());
}
}
/**
* Get the attributes of the node. By default there are none; this is overridden for element nodes
*
* @return an empty attribute map
*/
@Override
public AttributeMap attributes() {
return EmptyAttributeMap.getInstance();
}
/**
* Get a character string that uniquely identifies this node
*/
@Override
public void generateId(/*@NotNull*/ StringBuilder buffer) {
long seq = getSequenceNumber();
if (seq == -1L) {
getPhysicalRoot().generateId(buffer);
buffer.append(NODE_LETTER[getNodeKind()]);
buffer.append(seq + "h" + hashCode());
} else {
parent.generateId(buffer);
buffer.append(NODE_LETTER[getNodeKind()]);
buffer.append(index);
}
}
/**
* Get the system ID for the node. Default implementation for child nodes.
*/
/*@Nullable*/
@Override
public String getSystemId() {
return parent.getSystemId();
}
/**
* Get the base URI for the node. Default implementation for child nodes.
*/
@Override
public String getBaseURI() {
return parent.getBaseURI();
}
/**
* Get the node sequence number (in document order). Sequence numbers are monotonic but not
* consecutive. In the current implementation, parent nodes (elements and roots) have a zero
* least-significant word, while namespaces, attributes, text nodes, comments, and PIs have
* the top word the same as their owner and the bottom half reflecting their relative position.
* This is the default implementation for child nodes.
* For nodes added by XQuery Update, the sequence number is -1L
*
* @return the sequence number if there is one, or -1L otherwise.
*/
protected long getSequenceNumber() {
NodeImpl prev = this;
for (int i = 0; ; i++) {
if (prev instanceof ParentNodeImpl) {
long prevseq = prev.getSequenceNumber();
return prevseq == -1L ? prevseq : prevseq + 0x10000 + i;
// note the 0x10000 is to leave room for namespace and attribute nodes.
}
assert prev != null;
prev = prev.getPreviousInDocument();
}
}
/**
* 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 final int compareOrder(/*@NotNull*/ NodeInfo other) {
if (other instanceof NamespaceNode) {
return 0 - other.compareOrder(this);
}
long a = getSequenceNumber();
long b = ((NodeImpl) other).getSequenceNumber();
if (a == -1L || b == -1L) {
// Nodes added by XQuery Update do not have sequence numbers
return Navigator.compareOrder(this, (NodeImpl) other);
}
return Long.compare(a, b);
}
/**
* Get the configuration
*/
@Override
public Configuration getConfiguration() {
return getPhysicalRoot().getConfiguration();
}
/**
* Get the NamePool
* @return the namePool for the configuration owning this node
*/
public NamePool getNamePool() {
return getPhysicalRoot().getNamePool();
}
/**
* 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 an empty string.
*/
@Override
public String getPrefix() {
NodeName qName = getNodeName();
return qName == null ? "" : qName.getPrefix();
}
/**
* 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 the null namespace, return an
* empty string. For an unnamed node, return the empty string.
*/
@Override
public NamespaceUri getNamespaceUri() {
NodeName qName = getNodeName();
return qName == null ? NamespaceUri.NULL : qName.getNamespaceUri();
}
/**
* 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.
*/
@Override
public String getDisplayName() {
NodeName qName = getNodeName();
return qName == null ? "" : qName.getDisplayName();
}
/**
* Get the local name of this node.
*
* @return The local name of this node.
* For a node with no name, return "",.
*/
@Override
public String getLocalPart() {
NodeName qName = getNodeName();
return qName == null ? "" : qName.getLocalPart();
}
/**
* Get the line number of the node within its source document entity
*/
@Override
public int getLineNumber() {
return parent.getLineNumber();
}
/**
* 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;
}
/**
* Find the parent node of this node.
*
* @return The Node object describing the containing element or root node.
*/
/*@Nullable*/
@Override
public final NodeImpl getParent() {
if (parent instanceof DocumentImpl && ((DocumentImpl) parent).isImaginary()) {
return null;
}
return parent;
}
/**
* Get the raw value of the parent pointer. This will usually be the same as the parent node
* in the XDM model, but in the case of a parentless element it will be a pointer to the "imaginary"
* document node which is not properly part of the tree.
*
* @return either the real parent of this node, or the "imaginary" parent present in the tree
* implementation to provide a root object for the tree
*/
/*@Nullable*/
protected final ParentNodeImpl getRawParent() {
return parent;
}
/**
* Set the raw parent pointer
*
* @param parent the "raw" parent pointer: either the real parent, or a dummy parent
* added to ensure that the tree is properly rooted.
*/
protected final void setRawParent(/*@Nullable*/ ParentNodeImpl parent) {
this.parent = parent;
}
/**
* Get the previous sibling of the node
*
* @return The previous sibling node. Returns null if the current node is the first
* child of its parent.
*/
/*@Nullable*/
@Override
public NodeImpl getPreviousSibling() {
if (parent == null) {
return null;
}
return parent.getNthChild(index - 1);
}
/**
* Get next sibling node
*
* @return The next sibling node of the required type. Returns null if the current node is the last
* child of its parent.
*/
/*@Nullable*/
@Override
public NodeImpl getNextSibling() {
if (parent == null) {
return null;
}
return parent.getNthChild(index + 1);
}
/**
* Get first child - default implementation used for leaf nodes
*
* @return null
*/
/*@Nullable*/
@Override
public NodeImpl getFirstChild() {
return null;
}
/**
* Get last child - default implementation used for leaf nodes
*
* @return null
*/
/*@Nullable*/
public NodeInfo getLastChild() {
return null;
}
/**
* Return an iterator over the nodes reached by the given axis from this node
*
* @param axisNumber The axis to be iterated over
* @return an AxisIterator that scans the nodes reached by the axis in turn.
*/
@Override
public AxisIterator iterateAxis(int axisNumber) {
// Fast path for child axis
if (axisNumber == AxisInfo.CHILD) {
if (this instanceof ParentNodeImpl) {
return ((ParentNodeImpl) this).iterateChildren(null);
} else {
return EmptyIterator.ofNodes();
}
} else {
return iterateAxis(axisNumber, AnyNodeTest.getInstance());
}
}
/**
* 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 an AxisIterator that scans the nodes reached by the axis in turn.
*/
@Override
public AxisIterator iterateAxis(int axisNumber, NodePredicate predicate) {
NodeTest nodeTest = Navigator.nodeTestFromPredicate(predicate);
switch (axisNumber) {
case AxisInfo.ANCESTOR:
return new AncestorEnumeration(this, nodeTest, false);
case AxisInfo.ANCESTOR_OR_SELF:
return new AncestorEnumeration(this, nodeTest, true);
case AxisInfo.ATTRIBUTE:
if (getNodeKind() != Type.ELEMENT) {
return EmptyIterator.ofNodes();
} else {
return ((ElementImpl)this).iterateAttributes(nodeTest);
}
case AxisInfo.CHILD:
if (this instanceof ParentNodeImpl) {
return ((ParentNodeImpl) this).iterateChildren(nodeTest);
} else {
return EmptyIterator.ofNodes();
}
case AxisInfo.DESCENDANT:
if (getNodeKind() == Type.DOCUMENT &&
nodeTest instanceof NameTest &&
((NameTest)nodeTest).getPrimitiveType() == Type.ELEMENT) {
return ((DocumentImpl) this).getAllElements(((NameTest)nodeTest).getFingerprint());
} else if (hasChildNodes()) {
return new SteppingNavigator.DescendantAxisIterator(this, false, nodeTest);
} else {
return EmptyIterator.ofNodes();
}
case AxisInfo.DESCENDANT_OR_SELF:
return new SteppingNavigator.DescendantAxisIterator(this, true, nodeTest);
case AxisInfo.FOLLOWING:
return new FollowingEnumeration(this, nodeTest);
case AxisInfo.FOLLOWING_SIBLING:
return new FollowingSiblingEnumeration(this, nodeTest);
case AxisInfo.NAMESPACE:
if (getNodeKind() != Type.ELEMENT) {
return EmptyIterator.ofNodes();
}
return NamespaceNode.makeIterator(this, nodeTest);
case AxisInfo.PARENT:
NodeInfo parent = getParent();
if (parent == null) {
return EmptyIterator.ofNodes();
}
return Navigator.filteredSingleton(parent, nodeTest);
case AxisInfo.PRECEDING:
return new PrecedingEnumeration(this, nodeTest);
case AxisInfo.PRECEDING_SIBLING:
return new PrecedingSiblingEnumeration(this, nodeTest);
case AxisInfo.SELF:
return Navigator.filteredSingleton(this, nodeTest);
case AxisInfo.PRECEDING_OR_ANCESTOR:
return new PrecedingOrAncestorEnumeration(this, nodeTest);
default:
throw new IllegalArgumentException("Unknown axis number " + axisNumber);
}
}
/**
* Find the value of a given attribute of this node.
* This method is defined on all nodes to meet XSL requirements, but for nodes
* other than elements it will always return null.
*
* @param uri the namespace uri of an attribute
* @param localName the local name of an attribute
* @return the value of the attribute, if it exists, otherwise null
*/
/*@Nullable*/
@Override
public String getAttributeValue( /*@NotNull*/ NamespaceUri uri, /*@NotNull*/ String localName) {
return null;
}
/**
* Get the root node
*
* @return the NodeInfo representing the logical root of the tree. For this tree implementation the
* root will either be a document node or an element node.
*/
@Override
public NodeInfo getRoot() {
NodeInfo parent = getParent();
if (parent == null) {
return this;
} else {
return parent.getRoot();
}
}
/**
* Get the physical root of the tree. This may be an imaginary document node: this method
* should be used only when control information held at the physical root is required
*
* @return the document node, which may be imaginary. In the case of a node that has been detached
* from the tree by means of a delete() operation, this method returns null.
*/
/*@Nullable*/
public DocumentImpl getPhysicalRoot() {
ParentNodeImpl up = parent;
while (up != null && !(up instanceof DocumentImpl)) {
up = up.getRawParent();
}
return (DocumentImpl) up;
}
/**
* Get the next node in document order
*
* @param anchor the scan stops when it reaches a node that is not a descendant of the specified
* anchor node
* @return the next node in the document, or null if there is no such node
*/
/*@Nullable*/
public NodeImpl getNextInDocument(NodeImpl anchor) {
// find the first child node if there is one; otherwise the next sibling node
// if there is one; otherwise the next sibling of the parent, grandparent, etc, up to the anchor element.
// If this yields no result, return null.
NodeImpl next = getFirstChild();
if (next != null) {
return next;
}
if (this == anchor) {
return null;
}
next = getNextSibling();
if (next != null) {
return next;
}
NodeImpl parent = this;
while (true) {
parent = parent.getParent();
if (parent == null) {
return null;
}
if (parent == anchor) {
return null;
}
next = parent.getNextSibling();
if (next != null) {
return next;
}
}
}
@Override
public NodeImpl getSuccessorElement(SteppingNode anchor, NamespaceUri uri, String local) {
NodeImpl next = getNextInDocument((NodeImpl)anchor);
while (next != null && !(next.getNodeKind() == Type.ELEMENT &&
(uri == null || next.getNodeName().hasURI(uri)) &&
(local == null || local.equals(next.getLocalPart())))) {
next = next.getNextInDocument((NodeImpl)anchor);
}
return next;
}
/**
* Get the previous node in document order
*
* @return the previous node in the document, or null if there is no such node
*/
/*@Nullable*/
public NodeImpl getPreviousInDocument() {
// finds the last child of the previous sibling if there is one;
// otherwise the previous sibling element if there is one;
// otherwise the parent, up to the anchor element.
// If this reaches the document root, return null.
NodeImpl prev = getPreviousSibling();
if (prev != null) {
return prev.getLastDescendantOrSelf();
}
return getParent();
}
/*@NotNull*/
private NodeImpl getLastDescendantOrSelf() {
NodeImpl last = (NodeImpl) getLastChild();
if (last == null) {
return this;
}
return last.getLastDescendantOrSelf();
}
/**
* 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 ""). The map does NOT include
* the implicit binding of the XML namespace. 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.
*/
@Override
public NamespaceMap getAllNamespaces() {
return null;
}
/**
* Determine whether the node has any children.
*
* @return true if the node has any children,
* false if the node has no children.
*/
@Override
public boolean hasChildNodes() {
return getFirstChild() != null;
}
/**
* Set the type annotation on a node. This must only be called when the caller has verified (by validation)
* that the node is a valid instance of the specified type. The call is ignored if the node is not an element
* or attribute node.
*
* @param type the type annotation (possibly including high bits set to indicate the isID, isIDREF, and
* isNilled properties)
*/
@Override
public void setTypeAnnotation(SchemaType type) {
// no action
}
/**
* Delete this node (that is, detach it from its parent)
*/
@Override
public void delete() {
// Overridden for attribute nodes
if (parent != null) {
parent.removeChild(this);
DocumentImpl newRoot = new DocumentImpl();
newRoot.setConfiguration(getConfiguration());
newRoot.setImaginary(true);
parent = newRoot;
}
index = -1;
}
/**
* Test whether this MutableNodeInfo object represents a node that has been deleted.
* Generally, such a node is unusable, and any attempt to use it will result in an exception
* being thrown
*
* @return true if this node has been deleted
*/
@Override
public boolean isDeleted() {
return index == -1 || (parent != null && parent.isDeleted());
}
/**
* Set the attribute list for this (element) node
*
* @param attributes the new attribute list
* @throws UnsupportedOperationException if this is not an element node
*/
@Override
public void setAttributes(AttributeMap attributes) {
throw new UnsupportedOperationException("setAttributes() applies only to element nodes");
}
/**
* Remove an attribute from this element node
* If this node is not an element, or if the specified node is not an attribute
* of this element, this method takes no action.
* The attribute object itself becomes unusable; any attempt to use this attribute object,
* or any other object representing the same node, is likely to result in an exception.
*
* @param attribute the attribute node to be removed
*/
@Override
public void removeAttribute(NodeInfo attribute) {
// no action (overridden in subclasses)
}
/**
* Add an attribute to this element node.
* If this node is not an element, or if the supplied node is not an attribute, the method
* takes no action. If the element already has an attribute with this name, the method
* throws an exception.
* This method does not perform any namespace fixup. It is the caller's responsibility
* to ensure that any namespace prefix used in the name of the attribute (or in its value
* if it has a namespace-sensitive type) is declared on this element.
*
* @param name the name of the new attribute
* @param attType the type annotation of the new attribute
* @param value the string value of the new attribute
* @param properties properties including IS_ID and IS_IDREF properties
* @param inheritNamespaces true if any namespace needed for this attribute is to be inherited
* by descendant elements
* @throws IllegalStateException if the element already has an attribute with the given name.
*/
@Override
public void addAttribute(NodeName name, SimpleType attType, String value, int properties, boolean inheritNamespaces) {
// No action, unless this is an element node
}
/**
* Rename this node
*
* @param newNameCode the NamePool code of the new name
* @param inherit true if any namespace needed for the new name is to be inherited by descendant elements
*/
@Override
public void rename(NodeName newNameCode, boolean inherit) {
// implemented for node kinds that have a name
}
/**
* Add a namespace binding (that is, a namespace node) to this element. This call has no effect if applied
* to a node other than an element.
*
* @param nscode The namespace binding to be added
* @param inherit true if the namespace is to be inherited by descendant elements
*/
@Override
public void addNamespace(NamespaceBinding nscode, boolean inherit) {
// implemented for element nodes only
}
/**
* Replace this node with a given sequence of nodes. This node is effectively deleted, and the replacement
* nodes are attached to the parent of this node in its place.
* The supplied nodes will become children of this node's parent. Adjacent text nodes will be merged, and
* zero-length text nodes removed. The supplied nodes may be modified in situ, for example to change their
* parent property and to add namespace bindings, or they may be copied, at the discretion of
* the implementation.
*
* @param replacement the replacement nodes. If this node is an attribute, the replacements
* must also be attributes; if this node is not an attribute, the replacements must not be attributes.
* source the nodes to be inserted. The implementation determines what implementation classes
* of node it will accept; this implementation will accept attribute, text, comment, and processing instruction
* nodes belonging to any implementation, but elements must be instances of {@link net.sf.saxon.tree.linked.ElementImpl}.
* The supplied nodes will be modified in situ, for example
* to change their parent property and to add namespace bindings, if they are instances of
* {@link net.sf.saxon.tree.linked.ElementImpl}; otherwise they will be copied. If the nodes are copied, then on return
* the supplied source array will contain the copy rather than the original.
* @param inherit true if the replacement nodes are to inherit the namespaces of their new parent; false
* if such namespaces are to be undeclared
* @throws IllegalArgumentException if any of the replacement nodes is of the wrong kind. When replacing
* a child node, the replacement nodes must all be elements, text, comment, or PI nodes; when replacing
* an attribute, the replacement nodes must all be attributes.
* @throws IllegalStateException if this node is deleted or if it has no parent node.
* or if two replacement attributes have the same name.
*/
@Override
public void replace(NodeInfo[] replacement, boolean inherit) {
if (isDeleted()) {
throw new IllegalStateException("Cannot replace a deleted node");
}
if (getParent() == null) {
throw new IllegalStateException("Cannot replace a parentless node");
}
assert parent != null;
parent.replaceChildrenAt(replacement, index, inherit);
parent = null;
index = -1; // mark the node as deleted
}
/**
* Insert a sequence of nodes as children of this node.
* This method takes no action unless the target node is a document node or element node. It also
* takes no action in respect of any supplied nodes that are not elements, text nodes, comments, or
* processing instructions.
* The supplied nodes will form the new children. Adjacent text nodes will be merged, and
* zero-length text nodes removed. The supplied nodes may be modified in situ, for example to change their
* parent property and to add namespace bindings, or they may be copied, at the discretion of
* the implementation.
*
* @param source the nodes to be inserted. The implementation determines what implementation classes
* of node it will accept; all implementations must accept nodes constructed using the Builder supplied
* by the {@link #newBuilder} method on this object. The supplied nodes may be modified in situ, for example
* to change their parent property and to add namespace bindings, but this depends on the implementation.
* The argument array may be modified as a result of the call.
* @param atStart true if the new nodes are to be inserted before existing children; false if they are
* to be inserted after existing children
* @param inherit true if the inserted nodes are to inherit the namespaces of their new parent; false
* if such namespaces are to be undeclared
* @throws IllegalArgumentException if the supplied nodes use a node implementation that this
* implementation does not accept.
*/
@Override
public void insertChildren(NodeInfo[] source, boolean atStart, boolean inherit) {
// No action: node is not a document or element node
}
/**
* Insert copies of a sequence of nodes as siblings of this node.
* This method takes no action unless the target node is an element, text node, comment, or
* processing instruction, and one that has a parent node. It also
* takes no action in respect of any supplied nodes that are not elements, text nodes, comments, or
* processing instructions.
* The supplied nodes must use the same data model implementation as the tree into which they
* will be inserted.
*
* @param source the nodes to be inserted
* @param before true if the new nodes are to be inserted before the target node; false if they are
* @param inherit true if the inserted nodes are to inherit the namespaces of their new parent; false
* if such namespaces are to be undeclared
*/
@Override
public void insertSiblings(NodeInfo[] source, boolean before, boolean inherit) {
if (parent == null) {
throw new IllegalStateException("Cannot add siblings if there is no parent");
}
parent.insertChildrenAt(source, before ? index : index + 1, inherit);
}
/**
* Remove type information from this node (and its ancestors, recursively).
* This method implements the upd:removeType() primitive defined in the XQuery Update specification
*/
@Override
public void removeTypeAnnotation() {
// no action
}
/**
* Get a Builder suitable for building nodes that can be attached to this document.
*
* @return a new Builder that constructs nodes using the same object model implementation
* as this one, suitable for attachment to this tree
*/
/*@NotNull*/
@Override
public Builder newBuilder() {
return getPhysicalRoot().newBuilder();
}
/**
* Get the effective boolean value of this sequence
*
* @return the effective boolean value
* @throws XPathException if the sequence has no effective boolean value (for example a sequence of two integers)
*/
@Override
public boolean effectiveBooleanValue() throws XPathException {
return true;
}
}