| /* |
| * Copyright 2003-2007 the original author or authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package groovy.util.slurpersupport; |
| |
| import groovy.lang.Buildable; |
| import groovy.lang.Closure; |
| import groovy.lang.GroovyObject; |
| import groovy.lang.Writable; |
| |
| import java.io.IOException; |
| import java.io.Writer; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Stack; |
| |
| |
| /** |
| * @author John Wilson |
| * |
| */ |
| |
| public class Node implements Writable { |
| private final String name; |
| private final Map attributes; |
| private final Map attributeNamespaces; |
| private final String namespaceURI; |
| private final List children = new LinkedList(); |
| private final Stack replacementNodeStack = new Stack(); |
| |
| public Node(final Node parent, final String name, final Map attributes, final Map attributeNamespaces, final String namespaceURI) { |
| this.name = name; |
| this.attributes = attributes; |
| this.attributeNamespaces = attributeNamespaces; |
| this.namespaceURI = namespaceURI; |
| } |
| |
| public String name() { |
| return this.name; |
| } |
| |
| public String namespaceURI() { |
| return this.namespaceURI; |
| } |
| |
| public Map attributes() { |
| return this.attributes; |
| } |
| |
| public List children() { |
| return this.children; |
| } |
| |
| public void addChild(final Object child) { |
| this.children.add(child); |
| } |
| |
| public void replaceNode(final Closure replacementClosure, final GPathResult result) { |
| this.replacementNodeStack.push(new ReplacementNode() { |
| public void build(final GroovyObject builder, final Map namespaceMap, final Map namespaceTagHints) { |
| final Closure c = (Closure)replacementClosure.clone(); |
| |
| Node.this.replacementNodeStack.pop(); // disable the replacement whilst the closure is being executed |
| c.setDelegate(builder); |
| c.call(new Object[]{result}); |
| Node.this.replacementNodeStack.push(this); |
| } |
| }); |
| } |
| |
| |
| protected void replaceBody(final Object newValue) { |
| this.children.clear(); |
| this.children.add(newValue); |
| } |
| |
| protected void appendNode(final Object newValue, final GPathResult result) { |
| if (newValue instanceof Closure) { |
| this.children.add(new ReplacementNode() { |
| public void build(final GroovyObject builder, final Map namespaceMap, final Map namespaceTagHints) { |
| final Closure c = (Closure)((Closure)newValue).clone(); |
| |
| c.setDelegate(builder); |
| c.call(new Object[]{result}); |
| } |
| }); |
| } else { |
| this.children.add(newValue); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.codehaus.groovy.sandbox.util.slurpersupport.Node#text() |
| */ |
| public String text() { |
| final StringBuffer buff = new StringBuffer(); |
| final Iterator iter = this.children.iterator(); |
| |
| while (iter.hasNext()) { |
| final Object child = iter.next(); |
| |
| if (child instanceof Node) { |
| buff.append(((Node)child).text()); |
| } else { |
| buff.append(child); |
| } |
| } |
| |
| return buff.toString(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.codehaus.groovy.sandbox.util.slurpersupport.Node#childNodes() |
| */ |
| |
| public Iterator childNodes() { |
| return new Iterator() { |
| private final Iterator iter = Node.this.children.iterator(); |
| private Object nextElementNodes = getNextElementNodes(); |
| |
| public boolean hasNext() { |
| return this.nextElementNodes != null; |
| } |
| |
| public Object next() { |
| try { |
| return this.nextElementNodes; |
| } finally { |
| this.nextElementNodes = getNextElementNodes(); |
| } |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| private Object getNextElementNodes() { |
| while (iter.hasNext()) { |
| final Object node = iter.next(); |
| |
| if (node instanceof Node) { |
| return node; |
| } |
| } |
| |
| return null; |
| } |
| }; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.codehaus.groovy.sandbox.util.slurpersupport.Node#writeTo(java.io.Writer) |
| */ |
| public Writer writeTo(final Writer out) throws IOException { |
| if (this.replacementNodeStack.empty()) { |
| final Iterator iter = this.children.iterator(); |
| |
| while (iter.hasNext()) { |
| final Object child = iter.next(); |
| |
| if (child instanceof Writable) { |
| ((Writable)child).writeTo(out); |
| } else { |
| out.write(child.toString()); |
| } |
| } |
| |
| return out; |
| |
| } else { |
| return ((Writable)this.replacementNodeStack.peek()).writeTo(out); |
| } |
| } |
| |
| public void build(final GroovyObject builder, final Map namespaceMap, final Map namespaceTagHints) { |
| if (this.replacementNodeStack.empty()) { |
| final Closure rest = new Closure(null) { |
| public Object doCall(final Object o) { |
| buildChildren(builder, namespaceMap, namespaceTagHints); |
| |
| return null; |
| } |
| }; |
| |
| if (this.namespaceURI.length() == 0 && this.attributeNamespaces.isEmpty()) { |
| builder.invokeMethod(this.name, new Object[]{this.attributes, rest}); |
| } else { |
| final List newTags = new LinkedList(); |
| builder.getProperty("mkp"); |
| final List namespaces = (List)builder.invokeMethod("getNamespaces", new Object[]{}); |
| |
| final Map current = (Map)namespaces.get(0); |
| final Map pending = (Map)namespaces.get(1); |
| |
| if (this.attributeNamespaces.isEmpty()) { |
| builder.getProperty(getTagFor(this.namespaceURI, current, pending, namespaceMap, namespaceTagHints, newTags, builder)); |
| builder.invokeMethod(this.name, new Object[]{this.attributes, rest}); |
| } else { |
| final Map attributesWithNamespaces = new HashMap(this.attributes); |
| final Iterator attrs = this.attributes.keySet().iterator(); |
| |
| while (attrs.hasNext()) { |
| final Object key = attrs.next(); |
| final Object attributeNamespaceURI = this.attributeNamespaces.get(key); |
| |
| if (attributeNamespaceURI != null) { |
| attributesWithNamespaces.put(getTagFor(attributeNamespaceURI, current, pending, namespaceMap, namespaceTagHints, newTags, builder) + |
| "$" + key, attributesWithNamespaces.remove(key)); |
| } |
| } |
| |
| builder.getProperty(getTagFor(this.namespaceURI, current, pending, namespaceMap,namespaceTagHints, newTags, builder)); |
| builder.invokeMethod(this.name, new Object[]{attributesWithNamespaces, rest}); |
| } |
| |
| // remove the new tags we had to define for this element |
| if (!newTags.isEmpty()) { |
| final Iterator iter = newTags.iterator(); |
| |
| do { |
| pending.remove(iter.next()); |
| } while (iter.hasNext()); |
| } |
| } |
| } else { |
| ((ReplacementNode)this.replacementNodeStack.peek()).build(builder, namespaceMap, namespaceTagHints); |
| } |
| } |
| |
| private static String getTagFor(final Object namespaceURI, final Map current, |
| final Map pending, final Map local, final Map tagHints, |
| final List newTags, final GroovyObject builder) { |
| String tag = findNamespaceTag(pending, namespaceURI); // look in the namespaces whose declaration has already been emitted |
| |
| if (tag == null) { |
| tag = findNamespaceTag(current, namespaceURI); // look in the namespaces who will be declared at the next element |
| |
| if (tag == null) { |
| // we have to declare the namespace - choose a tag |
| tag = findNamespaceTag(local, namespaceURI); // If the namespace has been decared in the GPath expression use that tag |
| |
| if (tag == null || tag.length() == 0) { |
| tag = findNamespaceTag(tagHints, namespaceURI); // If the namespace has been used in the parse documant use that tag |
| } |
| |
| if (tag == null || tag.length() == 0) { // otherwise make up a new tag and check it has not been used before |
| int suffix = 0; |
| |
| do { |
| final String posibleTag = "tag" + suffix++; |
| |
| if (!pending.containsKey(posibleTag) && !current.containsKey(posibleTag) && !local.containsKey(posibleTag)) { |
| tag = posibleTag; |
| } |
| } while (tag == null); |
| } |
| |
| final Map newNamespace = new HashMap(); |
| newNamespace.put(tag, namespaceURI); |
| builder.getProperty("mkp"); |
| builder.invokeMethod("declareNamespace", new Object[]{newNamespace}); |
| newTags.add(tag); |
| } |
| } |
| |
| return tag; |
| } |
| |
| private static String findNamespaceTag(final Map tagMap, final Object namespaceURI) { |
| if (tagMap.containsValue(namespaceURI)) { |
| final Iterator entries = tagMap.entrySet().iterator(); |
| |
| while (entries.hasNext()) { |
| final Map.Entry entry = (Map.Entry)entries.next(); |
| |
| if (namespaceURI.equals(entry.getValue())) { |
| return (String)entry.getKey(); |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| private void buildChildren(final GroovyObject builder, final Map namespaceMap, final Map namespaceTagHints) { |
| final Iterator iter = this.children.iterator(); |
| |
| while (iter.hasNext()) { |
| final Object child = iter.next(); |
| |
| if (child instanceof Node) { |
| ((Node)child).build(builder, namespaceMap, namespaceTagHints); |
| } else if (child instanceof Buildable) { |
| ((Buildable)child).build(builder); |
| } else { |
| builder.getProperty("mkp"); |
| builder.invokeMethod("yield", new Object[]{child}); |
| } |
| } |
| } |
| } |