2021SC@SDUSC
- jdom包
- NodeListModel.java
- 代码展示
- 代码分析
- NodeListModel()构造方法
- createNodeListModel()方法
- isEmpty()方法
- getAsString()方法
package freemarker.ext.jdom;
import java.io.FileReader;
import java.io.IOException;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.linkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.WeakHashMap;
import org.jaxen.Context;
import org.jaxen.JaxenException;
import org.jaxen.NamespaceContext;
import org.jaxen.jdom.JDOMXPath;
import org.jdom.Attribute;
import org.jdom.CDATA;
import org.jdom.Comment;
import org.jdom.DocType;
import org.jdom.document;
import org.jdom.Element;
import org.jdom.EntityRef;
import org.jdom.Namespace;
import org.jdom.ProcessingInstruction;
import org.jdom.Text;
import org.jdom.output.XMLOutputter;
import freemarker.template.SimpleHash;
import freemarker.template.SimpleScalar;
import freemarker.template.Template;
import freemarker.template.TemplateCollectionModel;
import freemarker.template.TemplateHashModel;
import freemarker.template.TemplateMethodModel;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;
import freemarker.template.TemplateModelIterator;
import freemarker.template.TemplateScalarModel;
import freemarker.template.TemplateSequenceModel;
import freemarker.template._TemplateAPI;
@Deprecated
public class NodeListModel
implements
TemplateHashModel,
TemplateMethodModel,
TemplateCollectionModel,
TemplateSequenceModel,
TemplateScalarModel {
private static final AttributeXMLOutputter OUTPUT = new AttributeXMLOutputter();
// A convenience singleton for representing a node list without nodes.
private static final NodeListModel EMPTY = new NodeListModel(null, false);
// Cache of already parsed XPath expressions
private static final Map XPATH_CACHE = new WeakHashMap();
private static final NamedNodeOperator NAMED_CHILDREN_OP = new NamedChildrenOp();
private static final NamedNodeOperator NAMED_ATTRIBUTE_OP = new NamedAttributeOp();
private static final NodeOperator ALL_ATTRIBUTES_OP = new AllAttributesOp();
private static final NodeOperator ALL_CHILDREN_OP = new AllChildrenOp();
private static final Map OPERATIONS = createOperations();
private static final Map SPECIAL_OPERATIONS = createSpecialOperations();
private static final int SPECIAL_OPERATION_COPY = 0;
private static final int SPECIAL_OPERATION_UNIQUE = 1;
private static final int SPECIAL_OPERATION_FILTER_NAME = 2;
private static final int SPECIAL_OPERATION_FILTER_TYPE = 3;
private static final int SPECIAL_OPERATION_QUERY_TYPE = 4;
private static final int SPECIAL_OPERATION_REGISTER_NAMESPACE = 5;
private static final int SPECIAL_OPERATION_PLAINTEXT = 6;
// The contained nodes
private final List nodes;
private final Map namespaces;
public NodeListModel(document document) {
nodes = document == null ? Collections.EMPTY_LIST : Collections.singletonList(document);
namespaces = new HashMap();
}
public NodeListModel(Element element) {
nodes = element == null ? Collections.EMPTY_LIST : Collections.singletonList(element);
namespaces = new HashMap();
}
private NodeListModel(Object object, Map namespaces) {
nodes = object == null ? Collections.EMPTY_LIST : Collections.singletonList(object);
this.namespaces = namespaces;
}
public NodeListModel(List nodes) {
this(nodes, true);
}
public NodeListModel(List nodes, boolean copy) {
this.nodes = copy && nodes != null ? new ArrayList(nodes) : (nodes == null ? Collections.EMPTY_LIST : nodes);
namespaces = new HashMap();
}
private NodeListModel(List nodes, Map namespaces) {
this.nodes = nodes == null ? Collections.EMPTY_LIST : nodes;
this.namespaces = namespaces;
}
private static final NodeListModel createNodeListModel(List list, Map namespaces) {
if (list == null || list.isEmpty()) {
if (namespaces.isEmpty()) {
return EMPTY;
} else {
return new NodeListModel(Collections.EMPTY_LIST, namespaces);
}
}
if (list.size() == 1) return new NodeListModel(list.get(0), namespaces);
return new NodeListModel(list, namespaces);
}
@Override
public boolean isEmpty() {
return nodes.isEmpty();
}
@Override
public String getAsString()
throws TemplateModelException {
if (isEmpty())
return "";
java.io.StringWriter sw = new java.io.StringWriter(nodes.size() * 128);
try {
for (Iterator i = nodes.iterator(); i.hasNext(); ) {
Object node = i.next();
if (node instanceof Element)
OUTPUT.output((Element) node, sw);
else if (node instanceof Attribute)
OUTPUT.output((Attribute) node, sw);
else if (node instanceof String)
sw.write(OUTPUT.escapeElementEntities(node.toString()));
else if (node instanceof Text)
OUTPUT.output((Text) node, sw);
else if (node instanceof document)
OUTPUT.output((document) node, sw);
else if (node instanceof ProcessingInstruction)
OUTPUT.output((ProcessingInstruction) node, sw);
else if (node instanceof Comment)
OUTPUT.output((Comment) node, sw);
else if (node instanceof CDATA)
OUTPUT.output((CDATA) node, sw);
else if (node instanceof DocType)
OUTPUT.output((DocType) node, sw);
else if (node instanceof EntityRef)
OUTPUT.output((EntityRef) node, sw);
else
throw new TemplateModelException(node.getClass().getName() + " is not a core JDOM class");
}
} catch (IOException e) {
throw new TemplateModelException(e.getMessage());
}
return sw.toString();
}
@Override
public TemplateModel get(String key)
throws TemplateModelException {
if (isEmpty())
return EMPTY;
if (key == null || key.length() == 0)
throw new TemplateModelException("Invalid key [" + key + "]");
NodeOperator op = null;
NamedNodeOperator nop = null;
String name = null;
switch (key.charAt(0)) {
case '@':
{
if (key.length() != 2 || key.charAt(1) != '*') {
// Generic attribute key
nop = NAMED_ATTRIBUTE_OP;
name = key.substring(1);
} else
// It is @*
op = ALL_ATTRIBUTES_OP;
break;
}
case '*':
{
if (key.length() == 1)
op = ALL_CHILDREN_OP;
else
// Explicitly disallow any other identifier starting with asterisk
throw new TemplateModelException("Invalid key [" + key + "]");
break;
}
case 'x':
case '_':
{
op = (NodeOperator) OPERATIONS.get(key);
if (op == null) {
// Some special operation?
Integer specop = (Integer) SPECIAL_OPERATIONS.get(key);
if (specop != null) {
switch (specop.intValue()) {
case SPECIAL_OPERATION_COPY:
{
synchronized (namespaces) {
return new NodeListModel(nodes, (Map) ((HashMap) namespaces).clone());
}
}
case SPECIAL_OPERATION_UNIQUE:
return new NodeListModel(removeDuplicates(nodes), namespaces);
case SPECIAL_OPERATION_FILTER_NAME:
return new NameFilter();
case SPECIAL_OPERATION_FILTER_TYPE:
return new TypeFilter();
case SPECIAL_OPERATION_QUERY_TYPE:
return getType();
case SPECIAL_OPERATION_REGISTER_NAMESPACE:
return new RegisterNamespace();
case SPECIAL_OPERATION_PLAINTEXT:
return getPlainText();
}
}
}
break;
}
}
if (op == null && nop == null) {
nop = NAMED_CHILDREN_OP;
name = key;
}
List list = null;
if (op != null)
list = evaluateElementOperation(op, nodes);
else {
String localName = name;
Namespace namespace = Namespace.NO_NAMESPACE;
int colon = name.indexOf(':');
if (colon != -1) {
localName = name.substring(colon + 1);
String nsPrefix = name.substring(0, colon);
synchronized (namespaces) {
namespace = (Namespace) namespaces.get(nsPrefix);
}
if (namespace == null) {
if (nsPrefix.equals("xml"))
namespace = Namespace.XML_NAMESPACE;
else
throw new TemplateModelException("Unregistered namespace prefix '" + nsPrefix + "'");
}
}
list = evaluateNamedElementOperation(nop, localName, namespace, nodes);
}
return createNodeListModel(list, namespaces);
}
private TemplateModel getType() {
if (nodes.size() == 0)
return new SimpleScalar("");
Object firstNode = nodes.get(0);
char code;
if (firstNode instanceof Element)
code = 'e';
else if (firstNode instanceof Text || firstNode instanceof String)
code = 'x';
else if (firstNode instanceof Attribute)
code = 'a';
else if (firstNode instanceof EntityRef)
code = 'n';
else if (firstNode instanceof document)
code = 'd';
else if (firstNode instanceof DocType)
code = 't';
else if (firstNode instanceof Comment)
code = 'c';
else if (firstNode instanceof ProcessingInstruction)
code = 'p';
else
code = '?';
return new SimpleScalar(new String(new char[] { code}));
}
private SimpleScalar getPlainText()
throws TemplateModelException {
List list = evaluateElementOperation((TextOp) OPERATIONS.get("_text"), nodes);
StringBuilder buf = new StringBuilder();
for (Iterator it = list.iterator(); it.hasNext(); ) {
buf.append(it.next());
}
return new SimpleScalar(buf.toString());
}
@Override
public TemplateModelIterator iterator() {
return new TemplateModelIterator()
{
private final Iterator it = nodes.iterator();
@Override
public TemplateModel next() {
return it.hasNext() ? new NodeListModel(it.next(), namespaces) : null;
}
@Override
public boolean hasNext() {
return it.hasNext();
}
};
}
@Override
public TemplateModel get(int i)
throws TemplateModelException {
try {
return new NodeListModel(nodes.get(i), namespaces);
} catch (IndexOutOfBoundsException e) {
throw new TemplateModelException("Index out of bounds: " + e.getMessage());
}
}
@Override
public int size() {
return nodes.size();
}
@Override
public Object exec(List arguments)
throws TemplateModelException {
if (arguments == null || arguments.size() != 1)
throw new TemplateModelException("Exactly one argument required for execute() on NodeTemplate");
String xpathString = (String) arguments.get(0);
JDOMXPathEx xpath = null;
try {
synchronized (XPATH_CACHE) {
xpath = (JDOMXPathEx) XPATH_CACHE.get(xpathString);
if (xpath == null) {
xpath = new JDOMXPathEx(xpathString);
XPATH_CACHE.put(xpathString, xpath);
}
}
return createNodeListModel(xpath.selectNodes(nodes, namespaces), namespaces);
} catch (Exception e) {
throw new TemplateModelException("Could not evaulate XPath expression " + xpathString, e);
}
}
public void registerNamespace(String prefix, String uri) {
synchronized (namespaces) {
namespaces.put(prefix, Namespace.getNamespace(prefix, uri));
}
}
private interface NodeOperator {
List operate(Object node)
throws TemplateModelException;
}
private interface NamedNodeOperator {
List operate(Object node, String localName, Namespace namespace)
throws TemplateModelException;
}
private static final class AllChildrenOp implements NodeOperator {
@Override
public List operate(Object node) {
if (node instanceof Element)
return((Element) node).getChildren();
else if (node instanceof document) {
Element root = ((document) node).getRootElement();
return root == null ? Collections.EMPTY_LIST : Collections.singletonList(root);
}
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
return null;
}
}
private static final class NamedChildrenOp implements NamedNodeOperator {
@Override
public List operate(Object node, String localName, Namespace namespace) {
if (node instanceof Element) {
return((Element) node).getChildren(localName, namespace);
} else if (node instanceof document) {
Element root = ((document) node).getRootElement();
if (root != null &&
root.getName().equals(localName) &&
root.getNamespaceURI().equals(namespace.getURI())) {
return Collections.singletonList(root);
} else
return Collections.EMPTY_LIST;
}
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
return null;
}
}
private static final class AllAttributesOp implements NodeOperator {
@Override
public List operate(Object node) {
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
if (!(node instanceof Element)) {
return null;
}
return ((Element) node).getAttributes();
}
}
private static final class NamedAttributeOp implements NamedNodeOperator {
@Override
public List operate(Object node, String localName, Namespace namespace) {
Attribute attr = null;
if (node instanceof Element) {
Element element = (Element) node;
attr = element.getAttribute(localName, namespace);
} else if (node instanceof ProcessingInstruction) {
ProcessingInstruction pi = (ProcessingInstruction) node;
if ("target".equals(localName))
attr = new Attribute("target", pi.getTarget());
else if ("data".equals(localName))
attr = new Attribute("data", pi.getData());
else
attr = new Attribute(localName, pi.getValue(localName));
} else if (node instanceof DocType) {
DocType doctype = (DocType) node;
if ("publicId".equals(localName))
attr = new Attribute("publicId", doctype.getPublicID());
else if ("systemId".equals(localName))
attr = new Attribute("systemId", doctype.getSystemID());
else if ("elementName".equals(localName))
attr = new Attribute("elementName", doctype.getElementName());
}
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
else {
return null;
}
return attr == null ? Collections.EMPTY_LIST : Collections.singletonList(attr);
}
}
private static final class NameOp implements NodeOperator {
@Override
public List operate(Object node) {
if (node instanceof Element)
return Collections.singletonList(((Element) node).getName());
else if (node instanceof Attribute)
return Collections.singletonList(((Attribute) node).getName());
else if (node instanceof EntityRef)
return Collections.singletonList(((EntityRef) node).getName());
else if (node instanceof ProcessingInstruction)
return Collections.singletonList(((ProcessingInstruction) node).getTarget());
else if (node instanceof DocType)
return Collections.singletonList(((DocType) node).getPublicID());
else
return null;
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
// throw new TemplateModelException("_name can not be applied on " + node.getClass());
}
}
private static final class QNameOp implements NodeOperator {
@Override
public List operate(Object node) {
if (node instanceof Element)
return Collections.singletonList(((Element) node).getQualifiedName());
else if (node instanceof Attribute)
return Collections.singletonList(((Attribute) node).getQualifiedName());
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
return null;
// throw new TemplateModelException("_qname can not be applied on " + node.getClass());
}
}
private static final class NamespaceUriOp implements NodeOperator {
@Override
public List operate(Object node) {
if (node instanceof Element)
return Collections.singletonList(((Element) node).getNamespace().getURI());
else if (node instanceof Attribute)
return Collections.singletonList(((Attribute) node).getNamespace().getURI());
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
return null;
// throw new TemplateModelException("_nsuri can not be applied on " + node.getClass());
}
}
private static final class NamespacePrefixOp implements NodeOperator {
@Override
public List operate(Object node) {
if (node instanceof Element)
return Collections.singletonList(((Element) node).getNamespace().getPrefix());
else if (node instanceof Attribute)
return Collections.singletonList(((Attribute) node).getNamespace().getPrefix());
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
return null;
// throw new TemplateModelException("_nsprefix can not be applied on " + node.getClass());
}
}
private static final class CanonicalNameOp implements NodeOperator {
@Override
public List operate(Object node) {
if (node instanceof Element) {
Element element = (Element) node;
return Collections.singletonList(element.getNamespace().getURI() + element.getName());
} else if (node instanceof Attribute) {
Attribute attribute = (Attribute) node;
return Collections.singletonList(attribute.getNamespace().getURI() + attribute.getName());
}
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
return null;
// throw new TemplateModelException("_cname can not be applied on " + node.getClass());
}
}
private static final Element getParent(Object node) {
if (node instanceof Element)
return((Element) node).getParent();
else if (node instanceof Attribute)
return((Attribute) node).getParent();
else if (node instanceof Text)
return((Text) node).getParent();
else if (node instanceof ProcessingInstruction)
return((ProcessingInstruction) node).getParent();
else if (node instanceof Comment)
return((Comment) node).getParent();
else if (node instanceof EntityRef)
return((EntityRef) node).getParent();
else
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
return null;
// throw new TemplateModelException("_parent can not be applied on " + node.getClass());
}
private static final class ParentOp implements NodeOperator {
@Override
public List operate(Object node) {
Element parent = getParent(node);
return parent == null ? Collections.EMPTY_LIST : Collections.singletonList(parent);
}
}
private static final class AncestorOp implements NodeOperator {
@Override
public List operate(Object node) {
Element parent = getParent(node);
if (parent == null) return Collections.EMPTY_LIST;
linkedList list = new linkedList();
do {
list.addFirst(parent);
parent = parent.getParent();
} while (parent != null);
return list;
}
}
private static final class AncestorOrSelfOp implements NodeOperator {
@Override
public List operate(Object node) {
Element parent = getParent(node);
if (parent == null) return Collections.singletonList(node);
linkedList list = new linkedList();
list.addFirst(node);
do {
list.addFirst(parent);
parent = parent.getParent();
} while (parent != null);
return list;
}
}
private static class DescendantOp implements NodeOperator {
@Override
public List operate(Object node) {
linkedList list = new linkedList();
if (node instanceof Element) {
addChildren((Element) node, list);
} else if (node instanceof document) {
Element root = ((document) node).getRootElement();
list.add(root);
addChildren(root, list);
} else
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
return null;
// throw new TemplateModelException("_descendant can not be applied on " + node.getClass());
return list;
}
private void addChildren(Element element, List list) {
List children = element.getChildren();
Iterator it = children.iterator();
while (it.hasNext()) {
Element child = (Element) it.next();
list.add(child);
addChildren(child, list);
}
}
}
private static final class DescendantOrSelfOp extends DescendantOp {
@Override
public List operate(Object node) {
linkedList list = (linkedList) super.operate(node);
list.addFirst(node);
return list;
}
}
private static final class documentOp implements NodeOperator {
@Override
public List operate(Object node) {
document doc = null;
if (node instanceof Element)
doc = ((Element) node).getdocument();
else if (node instanceof Attribute) {
Element parent = ((Attribute) node).getParent();
doc = parent == null ? null : parent.getdocument();
} else if (node instanceof Text) {
Element parent = ((Text) node).getParent();
doc = parent == null ? null : parent.getdocument();
} else if (node instanceof document)
doc = (document) node;
else if (node instanceof ProcessingInstruction)
doc = ((ProcessingInstruction) node).getdocument();
else if (node instanceof EntityRef)
doc = ((EntityRef) node).getdocument();
else if (node instanceof Comment)
doc = ((Comment) node).getdocument();
else
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
return null;
// throw new TemplateModelException("_document can not be applied on " + node.getClass());
return doc == null ? Collections.EMPTY_LIST : Collections.singletonList(doc);
}
}
private static final class DocTypeOp implements NodeOperator {
@Override
public List operate(Object node) {
if (node instanceof document) {
DocType doctype = ((document) node).getDocType();
return doctype == null ? Collections.EMPTY_LIST : Collections.singletonList(doctype);
} else
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
return null;
// throw new TemplateModelException("_doctype can not be applied on " + node.getClass());
}
}
private static final class ContentOp implements NodeOperator {
@Override
public List operate(Object node) {
if (node instanceof Element)
return((Element) node).getContent();
else if (node instanceof document)
return((document) node).getContent();
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
return null;
// throw new TemplateModelException("_content can not be applied on " + node.getClass());
}
}
private static final class TextOp implements NodeOperator {
@Override
public List operate(Object node) {
if (node instanceof Element)
return Collections.singletonList(((Element) node).getTextTrim());
if (node instanceof Attribute)
return Collections.singletonList(((Attribute) node).getValue());
if (node instanceof CDATA)
return Collections.singletonList(((CDATA) node).getText());
if (node instanceof Comment)
return Collections.singletonList(((Comment) node).getText());
if (node instanceof ProcessingInstruction)
return Collections.singletonList(((ProcessingInstruction) node).getData());
// With 2.1 semantics it makes more sense to just return a null and let the core
// throw an InvalidReferenceException and the template writer can use ?exists etcetera. (JR)
return null;
// throw new TemplateModelException("_text can not be applied on " + node.getClass());
}
}
private static final List evaluateElementOperation(NodeOperator op, List nodes)
throws TemplateModelException {
int s = nodes.size();
List[] lists = new List[s];
int l = 0;
{
int i = 0;
Iterator it = nodes.iterator();
while (it.hasNext()) {
List list = op.operate(it.next());
if (list != null) {
lists[i++] = list;
l += list.size();
}
}
}
List retval = new ArrayList(l);
for (int i = 0; i < s; ++i) {
if (lists[i] != null) {
retval.addAll(lists[i]);
}
}
return retval;
}
private static final List evaluateNamedElementOperation(NamedNodeOperator op, String localName, Namespace namespace, List nodes)
throws TemplateModelException {
int s = nodes.size();
List[] lists = new List[s];
int l = 0;
{
int i = 0;
Iterator it = nodes.iterator();
while (it.hasNext()) {
List list = op.operate(it.next(), localName, namespace);
lists[i++] = list;
l += list.size();
}
}
List retval = new ArrayList(l);
for (int i = 0; i < s; ++i)
retval.addAll(lists[i]);
return retval;
}
private static final List removeDuplicates(List list) {
int s = list.size();
ArrayList ulist = new ArrayList(s);
Set set = new HashSet(s * 4 / 3, .75f);
Iterator it = list.iterator();
while (it.hasNext()) {
Object o = it.next();
if (set.add(o))
ulist.add(o);
}
ulist.trimToSize();
return ulist;
}
private static final Map createOperations() {
Map map = new HashMap();
map.put("_ancestor", new AncestorOp());
map.put("_ancestorOrSelf", new AncestorOrSelfOp());
map.put("_attributes", ALL_ATTRIBUTES_OP);
map.put("_children", ALL_CHILDREN_OP);
map.put("_cname", new CanonicalNameOp());
map.put("_content", new ContentOp());
map.put("_descendant", new DescendantOp());
map.put("_descendantOrSelf", new DescendantOrSelfOp());
map.put("_document", new documentOp());
map.put("_doctype", new DocTypeOp());
map.put("_name", new NameOp());
map.put("_nsprefix", new NamespacePrefixOp());
map.put("_nsuri", new NamespaceUriOp());
map.put("_parent", new ParentOp());
map.put("_qname", new QNameOp());
map.put("_text", new TextOp());
return map;
}
private static final Map createSpecialOperations() {
Map map = new HashMap();
Integer copy = Integer.valueOf(SPECIAL_OPERATION_COPY);
Integer unique = Integer.valueOf(SPECIAL_OPERATION_UNIQUE);
Integer fname = Integer.valueOf(SPECIAL_OPERATION_FILTER_NAME);
Integer ftype = Integer.valueOf(SPECIAL_OPERATION_FILTER_TYPE);
Integer type = Integer.valueOf(SPECIAL_OPERATION_QUERY_TYPE);
Integer regns = Integer.valueOf(SPECIAL_OPERATION_REGISTER_NAMESPACE);
Integer plaintext = Integer.valueOf(SPECIAL_OPERATION_PLAINTEXT);
map.put("_copy", copy);
map.put("_unique", unique);
map.put("_fname", fname);
map.put("_ftype", ftype);
map.put("_type", type);
map.put("_registerNamespace", regns);
map.put("_plaintext", plaintext);
// These are in for backward compatibility
map.put("x_copy", copy);
map.put("x_unique", unique);
map.put("x_fname", fname);
map.put("x_ftype", ftype);
map.put("x_type", type);
return map;
}
private final class RegisterNamespace implements TemplateMethodModel {
public boolean isEmpty() {
return false;
}
@Override
public Object exec(List arguments)
throws TemplateModelException {
if (arguments.size() != 2)
throw new TemplateModelException("_registerNamespace(prefix, uri) requires two arguments");
registerNamespace((String) arguments.get(0), (String) arguments.get(1));
return TemplateScalarModel.EMPTY_STRING;
}
}
private final class NameFilter implements TemplateMethodModel {
public boolean isEmpty() {
return false;
}
@Override
public Object exec(List arguments) {
Set names = new HashSet(arguments);
List list = new linkedList(nodes);
Iterator it = list.iterator();
while (it.hasNext()) {
Object node = it.next();
String name = null;
if (node instanceof Element)
name = ((Element) node).getName();
else if (node instanceof Attribute)
name = ((Attribute) node).getName();
else if (node instanceof ProcessingInstruction)
name = ((ProcessingInstruction) node).getTarget();
else if (node instanceof EntityRef)
name = ((EntityRef) node).getName();
else if (node instanceof DocType)
name = ((DocType) node).getPublicID();
if (name == null || !names.contains(name))
it.remove();
}
return createNodeListModel(list, namespaces);
}
}
private final class TypeFilter implements TemplateMethodModel {
public boolean isEmpty() {
return false;
}
@Override
public Object exec(List arguments)
throws TemplateModelException {
if (arguments == null || arguments.size() == 0)
throw new TemplateModelException("_type expects exactly one argument");
String arg = (String) arguments.get(0);
boolean invert = arg.indexOf('!') != -1;
// NOTE: true in each of these variables means 'remove', not 'keep'
// This is so we don't invert their values in the loop. So,
// a is true <--> (a is not present in the string) xor invert.
boolean a = invert != (arg.indexOf('a') == -1);
boolean c = invert != (arg.indexOf('c') == -1);
boolean d = invert != (arg.indexOf('d') == -1);
boolean e = invert != (arg.indexOf('e') == -1);
boolean n = invert != (arg.indexOf('n') == -1);
boolean p = invert != (arg.indexOf('p') == -1);
boolean t = invert != (arg.indexOf('t') == -1);
boolean x = invert != (arg.indexOf('x') == -1);
linkedList list = new linkedList(nodes);
Iterator it = list.iterator();
while (it.hasNext()) {
Object node = it.next();
if ((node instanceof Element && e)
|| (node instanceof Attribute && a)
|| (node instanceof String && x)
|| (node instanceof Text && x)
|| (node instanceof ProcessingInstruction && p)
|| (node instanceof Comment && c)
|| (node instanceof EntityRef && n)
|| (node instanceof document && d)
|| (node instanceof DocType && t))
it.remove();
}
return createNodeListModel(list, namespaces);
}
}
@Deprecated
public static void main(String[] args)
throws Exception {
org.jdom.input.SAXBuilder builder = new org.jdom.input.SAXBuilder();
document document = builder.build(System.in);
SimpleHash model = new SimpleHash(_TemplateAPI.SAFE_OBJECT_WRAPPER);
model.put("document", new NodeListModel(document));
FileReader fr = new FileReader(args[0]);
Template template = new Template(args[0], fr);
Writer w = new java.io.OutputStreamWriter(System.out);
template.process(model, w);
w.flush();
w.close();
}
private static final class AttributeXMLOutputter extends XMLOutputter {
public void output(Attribute attribute, Writer out)
throws IOException {
out.write(" ");
out.write(attribute.getQualifiedName());
out.write("=");
out.write(""");
out.write(escapeAttributeEntities(attribute.getValue()));
out.write(""");
}
}
private static final class JDOMXPathEx
extends
JDOMXPath {
JDOMXPathEx(String path)
throws JaxenException {
super(path);
}
public List selectNodes(Object object, Map namespaces)
throws JaxenException {
Context context = getContext(object);
context.getContextSupport().setNamespaceContext(new NamespaceContextImpl(namespaces));
return selectNodesForContext(context);
}
private static final class NamespaceContextImpl
implements
NamespaceContext {
private final Map namespaces;
NamespaceContextImpl(Map namespaces) {
this.namespaces = namespaces;
}
@Override
public String translateNamespacePrefixToUri(String prefix) {
// Empty prefix always maps to empty URL in XPath
if (prefix.length() == 0) {
return prefix;
}
synchronized (namespaces) {
Namespace ns = (Namespace) namespaces.get(prefix);
return ns == null ? null : ns.getURI();
}
}
}
}
}
代码分析
NodeListModel()构造方法
public NodeListModel(document document) {
nodes = document == null ? Collections.EMPTY_LIST : Collections.singletonList(document);
namespaces = new HashMap();
}
public NodeListModel(Element element) {
nodes = element == null ? Collections.EMPTY_LIST : Collections.singletonList(element);
namespaces = new HashMap();
}
private NodeListModel(Object object, Map namespaces) {
nodes = object == null ? Collections.EMPTY_LIST : Collections.singletonList(object);
this.namespaces = namespaces;
}
public NodeListModel(List nodes) {
this(nodes, true);
}
public NodeListModel(List nodes, boolean copy) {
this.nodes = copy && nodes != null ? new ArrayList(nodes) : (nodes == null ? Collections.EMPTY_LIST : nodes);
namespaces = new HashMap();
}
private NodeListModel(List nodes, Map namespaces) {
this.nodes = nodes == null ? Collections.EMPTY_LIST : nodes;
this.namespaces = namespaces;
}
createNodeListModel()方法
private static final NodeListModel createNodeListModel(List list, Map namespaces) {
if (list == null || list.isEmpty()) {
if (namespaces.isEmpty()) {
return EMPTY;
} else {
return new NodeListModel(Collections.EMPTY_LIST, namespaces);
}
}
if (list.size() == 1) return new NodeListModel(list.get(0), namespaces);
return new NodeListModel(list, namespaces);
}
isEmpty()方法
@Override
public boolean isEmpty() {
return nodes.isEmpty();
}
getAsString()方法
@Override
public String getAsString()
throws TemplateModelException {
if (isEmpty())
return "";
java.io.StringWriter sw = new java.io.StringWriter(nodes.size() * 128);
try {
for (Iterator i = nodes.iterator(); i.hasNext(); ) {
Object node = i.next();
if (node instanceof Element)
OUTPUT.output((Element) node, sw);
else if (node instanceof Attribute)
OUTPUT.output((Attribute) node, sw);
else if (node instanceof String)
sw.write(OUTPUT.escapeElementEntities(node.toString()));
else if (node instanceof Text)
OUTPUT.output((Text) node, sw);
else if (node instanceof document)
OUTPUT.output((document) node, sw);
else if (node instanceof ProcessingInstruction)
OUTPUT.output((ProcessingInstruction) node, sw);
else if (node instanceof Comment)
OUTPUT.output((Comment) node, sw);
else if (node instanceof CDATA)
OUTPUT.output((CDATA) node, sw);
else if (node instanceof DocType)
OUTPUT.output((DocType) node, sw);
else if (node instanceof EntityRef)
OUTPUT.output((EntityRef) node, sw);
else
throw new TemplateModelException(node.getClass().getName() + " is not a core JDOM class");
}
} catch (IOException e) {
throw new TemplateModelException(e.getMessage());
}
return sw.toString();
}
