TreeReceiver.java
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net.sf.saxon.event |
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Saxon |
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These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
package net.sf.saxon.event;
import net.sf.saxon.om.*;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.value.AtomicValue;
import net.sf.saxon.type.Type;
/**
* A TreeReceiver acts as a bridge between a SequenceReceiver, which can receive
* events for constructing any kind of sequence, and an ordinary Receiver, which
* only handles events relating to the building of trees. To do this, it has to
* process any items added to the sequence using the append() interface; all other
* events are passed through unchanged.
*/
public class TreeReceiver extends SequenceReceiver {
private Receiver baseReceiver;
private boolean contentStarted = true;
public TreeReceiver(Receiver nextInChain) {
baseReceiver = nextInChain;
previousAtomic = false;
setPipelineConfiguration(nextInChain.getPipelineConfiguration());
}
public void setSystemId(String systemId) {
if (systemId != this.systemId) {
this.systemId = systemId;
if (baseReceiver != null) {
baseReceiver.setSystemId(systemId);
}
}
}
/**
* Get the underlying Receiver (that is, the next one in the pipeline)
*/
public Receiver getUnderlyingReceiver() {
return baseReceiver;
}
/**
* Start of event sequence
*/
public void open() throws XPathException {
if (baseReceiver == null) {
throw new IllegalStateException("TreeReceiver.open(): no underlying receiver provided");
}
baseReceiver.open();
previousAtomic = false;
}
/**
* End of event sequence
*/
public void close() throws XPathException {
if (baseReceiver != null) {
baseReceiver.close();
}
previousAtomic = false;
}
/**
* Start of a document node.
*/
public void startDocument(int properties) throws XPathException {
baseReceiver.startDocument(properties);
}
/**
* Notify the end of a document node
*/
public void endDocument() throws XPathException {
baseReceiver.endDocument();
}
/**
* Notify the start of an element
* @param nameCode integer code identifying the name of the element within the name pool.
* @param typeCode integer code identifying the element's type within the name pool.
* @param properties bit-significant properties of the element node
*/
public void startElement(int nameCode, int typeCode, int locationId, int properties) throws XPathException {
if (!contentStarted) {
startContent();
}
contentStarted = false;
baseReceiver.startElement(nameCode, typeCode, locationId, properties);
previousAtomic = false;
}
/**
* Notify a namespace. Namespaces are notified <b>after</b> the startElement event, and before
* any children for the element. The namespaces that are reported are only required
* to include those that are different from the parent element; however, duplicates may be reported.
* A namespace must not conflict with any namespaces already used for element or attribute names.
* @param namespaceCode an integer: the top half is a prefix code, the bottom half a URI code.
* These may be translated into an actual prefix and URI using the name pool. A prefix code of
* zero represents the empty prefix (that is, the default namespace). A URI code of zero represents
* a URI of "", that is, a namespace undeclaration.
* @throws IllegalStateException: attempt to output a namespace when there is no open element
* start tag
*/
public void namespace(int namespaceCode, int properties) throws XPathException {
baseReceiver.namespace(namespaceCode, properties);
previousAtomic = false;
}
/**
* Notify an attribute. Attributes are notified after the startElement event, and before any
* children. Namespaces and attributes may be intermingled.
* @param nameCode The name of the attribute, as held in the name pool
* @param typeCode The type of the attribute, as held in the name pool
* @param properties Bit significant value. The following bits are defined:
* <dd>DISABLE_ESCAPING</dd> <dt>Disable escaping for this attribute</dt>
* <dd>NO_SPECIAL_CHARACTERS</dd> <dt>Attribute value contains no special characters</dt>
* @throws IllegalStateException: attempt to output an attribute when there is no open element
* start tag
*/
public void attribute(int nameCode, int typeCode, CharSequence value, int locationId, int properties)
throws XPathException {
baseReceiver.attribute(nameCode, typeCode, value, locationId, properties);
previousAtomic = false;
}
/**
* Notify the start of the content, that is, the completion of all attributes and namespaces.
* Note that the initial receiver of output from XSLT instructions will not receive this event,
* it has to detect it itself. Note that this event is reported for every element even if it has
* no attributes, no namespaces, and no content.
*/
public void startContent() throws XPathException {
contentStarted = true;
baseReceiver.startContent();
previousAtomic = false;
}
/**
* End of element
*/
public void endElement() throws XPathException {
if (!contentStarted) {
startContent();
}
baseReceiver.endElement();
previousAtomic = false;
}
/**
* Character data
*/
public void characters(CharSequence chars, int locationId, int properties) throws XPathException {
if (!contentStarted) {
startContent();
}
baseReceiver.characters(chars, locationId, properties);
previousAtomic = false;
}
/**
* Processing Instruction
*/
public void processingInstruction(String target, CharSequence data, int locationId, int properties) throws XPathException {
if (!contentStarted) {
startContent();
}
baseReceiver.processingInstruction(target, data, locationId, properties);
previousAtomic = false;
}
/**
* Output a comment
*/
public void comment(CharSequence chars, int locationId, int properties) throws XPathException {
if (!contentStarted) {
startContent();
}
baseReceiver.comment(chars, locationId, properties);
previousAtomic = false;
}
/**
* Set the URI for an unparsed entity in the document.
*/
public void setUnparsedEntity(String name, String uri, String publicId) throws XPathException {
baseReceiver.setUnparsedEntity(name, uri, publicId);
}
/**
* Append an arbitrary item (node or atomic value) to the output
*/
public void append(Item item, int locationId, int copyNamespaces) throws XPathException {
if (item instanceof AtomicValue) {
if (previousAtomic) {
characters(" ", locationId, 0);
}
characters(item.getStringValueCS(), locationId, 0);
previousAtomic = true;
} else if (((NodeInfo)item).getNodeKind() == Type.DOCUMENT) {
SequenceIterator iter = ((NodeInfo)item).iterateAxis(Axis.CHILD);
while (true) {
Item it = iter.next();
if (it == null) break;
append(it, locationId, NodeInfo.ALL_NAMESPACES);
}
} else {
((NodeInfo)item).copy(this, NodeInfo.ALL_NAMESPACES, true, locationId);
previousAtomic = false;
}
}
}
//
// 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.
//
The table below shows all metrics for TreeReceiver.java.




