src/share/jaxws_classes/com/sun/xml/internal/txw2/ContainerElement.java - platform/external/jetbrains/jdk8u_jaxws - Git at Google

 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */

 package com.sun.xml.internal.txw2;

 import com.sun.xml.internal.txw2.annotation.XmlAttribute;
 import com.sun.xml.internal.txw2.annotation.XmlElement;
 import com.sun.xml.internal.txw2.annotation.XmlNamespace;
 import com.sun.xml.internal.txw2.annotation.XmlValue;
 import com.sun.xml.internal.txw2.annotation.XmlCDATA;

 import javax.xml.namespace.QName;
 import java.lang.reflect.InvocationHandler;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Proxy;

 /**
  * Dynamically implements {@link TypedXmlWriter} interfaces.
  *
  * @author Kohsuke Kawaguchi
  */
 final class ContainerElement implements InvocationHandler, TypedXmlWriter {

     final Document document;

     /**
      * Initially, point to the start tag token, but
      * once we know we are done with the start tag, we will reset it to null
      * so that the token sequence can be GC-ed.
      */
     StartTag startTag;
     final EndTag endTag = new EndTag();

     /**
      * Namespace URI of this element.
      */
     private final String nsUri;

     /**
      * When this element can accept more child content, this value
      * is non-null and holds the last child {@link Content}.
      *
      * If this element is committed, this parameter is null.
      */
     private Content tail;

     /**
      * Uncommitted {@link ContainerElement}s form a doubly-linked list,
      * so that the parent can close them recursively.
      */
     private ContainerElement prevOpen;
     private ContainerElement nextOpen;
     private final ContainerElement parent;
     private ContainerElement lastOpenChild;

     /**
      * Set to true if the start eleent is blocked.
      */
     private boolean blocked;

     public ContainerElement(Document document,ContainerElement parent,String nsUri, String localName) {
         this.parent = parent;
         this.document = document;
         this.nsUri = nsUri;
         this.startTag = new StartTag(this,nsUri,localName);
         tail = startTag;

         if(isRoot())
             document.setFirstContent(startTag);
     }

     private boolean isRoot() {
         return parent==null;
     }

     private boolean isCommitted() {
         return tail==null;
     }

     public Document getDocument() {
         return document;
     }

     boolean isBlocked() {
         return blocked && !isCommitted();
     }

     public void block() {
         blocked = true;
     }

     public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
         if(method.getDeclaringClass()==TypedXmlWriter.class || method.getDeclaringClass()==Object.class) {
             // forward to myself
             try {
                 return method.invoke(this,args);
             } catch (InvocationTargetException e) {
                 throw e.getTargetException();
             }
         }

         XmlAttribute xa = method.getAnnotation(XmlAttribute.class);
         XmlValue xv = method.getAnnotation(XmlValue.class);
         XmlElement xe = method.getAnnotation(XmlElement.class);


         if(xa!=null) {
             if(xv!=null || xe!=null)
                 throw new IllegalAnnotationException(method.toString());

             addAttribute(xa,method,args);
             return proxy; // allow method chaining
         }
         if(xv!=null) {
             if(xe!=null)
                 throw new IllegalAnnotationException(method.toString());

             _pcdata(args);
             return proxy; // allow method chaining
         }

         return addElement(xe,method,args);
     }

     /**
      * Writes an attribute.
      */
     private void addAttribute(XmlAttribute xa, Method method, Object[] args) {
         assert xa!=null;

         checkStartTag();

         String localName = xa.value();
         if(xa.value().length()==0)
             localName = method.getName();

         _attribute(xa.ns(),localName,args);
     }

     private void checkStartTag() {
         if(startTag==null)
             throw new IllegalStateException("start tag has already been written");
     }

     /**
      * Writes a new element.
      */
     private Object addElement(XmlElement e, Method method, Object[] args) {
         Class<?> rt = method.getReturnType();

         // the last precedence: default name
         String nsUri = "##default";
         String localName = method.getName();

         if(e!=null) {
             // then the annotation on this method
             if(e.value().length()!=0)
                 localName = e.value();
             nsUri = e.ns();
         }

         if(nsUri.equals("##default")) {
             // look for the annotation on the declaring class
             Class<?> c = method.getDeclaringClass();
             XmlElement ce = c.getAnnotation(XmlElement.class);
             if(ce!=null) {
                 nsUri = ce.ns();
             }

             if(nsUri.equals("##default"))
                 // then default to the XmlNamespace
                 nsUri = getNamespace(c.getPackage());
         }


         if(rt==Void.TYPE) {
             // leaf element with just a value

             boolean isCDATA = method.getAnnotation(XmlCDATA.class)!=null;

             StartTag st = new StartTag(document,nsUri,localName);
             addChild(st);
             for( Object arg : args ) {
                 Text text;
                 if(isCDATA)     text = new Cdata(document,st,arg);
                 else            text = new Pcdata(document,st,arg);
                 addChild(text);
             }
             addChild(new EndTag());
             return null;
         }
         if(TypedXmlWriter.class.isAssignableFrom(rt)) {
             // sub writer
             return _element(nsUri,localName,(Class)rt);
         }

         throw new IllegalSignatureException("Illegal return type: "+rt);
     }

     /**
      * Decides the namespace URI of the given package.
      */
     private String getNamespace(Package pkg) {
         if(pkg==null)       return "";

         String nsUri;
         XmlNamespace ns = pkg.getAnnotation(XmlNamespace.class);
         if(ns!=null)
             nsUri = ns.value();
         else
             nsUri = "";
         return nsUri;
     }

     /**
      * Appends this child object to the tail.
      */
     private void addChild(Content child) {
         tail.setNext(document,child);
         tail = child;
     }

     public void commit() {
         commit(true);
     }

     public void commit(boolean includingAllPredecessors) {
         _commit(includingAllPredecessors);
         document.flush();
     }

     private void _commit(boolean includingAllPredecessors) {
         if(isCommitted())  return;

         addChild(endTag);
         if(isRoot())
             addChild(new EndDocument());
         tail = null;

         // _commit predecessors if so told
         if(includingAllPredecessors) {
             for( ContainerElement e=this; e!=null; e=e.parent ) {
                 while(e.prevOpen!=null) {
                     e.prevOpen._commit(false);
                     // e.prevOpen should change as a result of committing it.
                 }
             }
         }

         // _commit all children recursively
         while(lastOpenChild!=null)
             lastOpenChild._commit(false);

         // remove this node from the link
         if(parent!=null) {
             if(parent.lastOpenChild==this) {
                 assert nextOpen==null : "this must be the last one";
                 parent.lastOpenChild = prevOpen;
             } else {
                 assert nextOpen.prevOpen==this;
                 nextOpen.prevOpen = this.prevOpen;
             }
             if(prevOpen!=null) {
                 assert prevOpen.nextOpen==this;
                 prevOpen.nextOpen = this.nextOpen;
             }
         }

         this.nextOpen = null;
         this.prevOpen = null;
     }

     public void _attribute(String localName, Object value) {
         _attribute("",localName,value);
     }

     public void _attribute(String nsUri, String localName, Object value) {
         checkStartTag();
         startTag.addAttribute(nsUri,localName,value);
     }

     public void _attribute(QName attributeName, Object value) {
         _attribute(attributeName.getNamespaceURI(),attributeName.getLocalPart(),value);
     }

     public void _namespace(String uri) {
         _namespace(uri,false);
     }

     public void _namespace(String uri, String prefix) {
         if(prefix==null)
             throw new IllegalArgumentException();
         checkStartTag();
         startTag.addNamespaceDecl(uri,prefix,false);
     }

     public void _namespace(String uri, boolean requirePrefix) {
         checkStartTag();
         startTag.addNamespaceDecl(uri,null,requirePrefix);
     }

     public void _pcdata(Object value) {
         // we need to allow this method even when startTag has already been completed.
         // checkStartTag();
         addChild(new Pcdata(document,startTag,value));
     }

     public void _cdata(Object value) {
         addChild(new Cdata(document,startTag,value));
     }

     public void _comment(Object value) throws UnsupportedOperationException {
         addChild(new Comment(document,startTag,value));
     }

     public <T extends TypedXmlWriter> T _element(String localName, Class<T> contentModel) {
         return _element(nsUri,localName,contentModel);
     }

     public <T extends TypedXmlWriter> T _element(QName tagName, Class<T> contentModel) {
         return _element(tagName.getNamespaceURI(),tagName.getLocalPart(),contentModel);
     }

     public <T extends TypedXmlWriter> T _element(Class<T> contentModel) {
         return _element(TXW.getTagName(contentModel),contentModel);
     }

     public <T extends TypedXmlWriter> T _cast(Class<T> facadeType) {
         return facadeType.cast(Proxy.newProxyInstance(facadeType.getClassLoader(),new Class[]{facadeType},this));
     }

     public <T extends TypedXmlWriter> T _element(String nsUri, String localName, Class<T> contentModel) {
         ContainerElement child = new ContainerElement(document,this,nsUri,localName);
         addChild(child.startTag);
         tail = child.endTag;

         // update uncommitted link list
         if(lastOpenChild!=null) {
             assert lastOpenChild.parent==this;

             assert child.prevOpen==null;
             assert child.nextOpen==null;
             child.prevOpen = lastOpenChild;
             assert lastOpenChild.nextOpen==null;
             lastOpenChild.nextOpen = child;
         }

         this.lastOpenChild = child;

         return child._cast(contentModel);
     }
 }
	/*
	* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package com.sun.xml.internal.txw2;

	import com.sun.xml.internal.txw2.annotation.XmlAttribute;
	import com.sun.xml.internal.txw2.annotation.XmlElement;
	import com.sun.xml.internal.txw2.annotation.XmlNamespace;
	import com.sun.xml.internal.txw2.annotation.XmlValue;
	import com.sun.xml.internal.txw2.annotation.XmlCDATA;

	import javax.xml.namespace.QName;
	import java.lang.reflect.InvocationHandler;
	import java.lang.reflect.InvocationTargetException;
	import java.lang.reflect.Method;
	import java.lang.reflect.Proxy;

	/**
	* Dynamically implements {@link TypedXmlWriter} interfaces.
	*
	* @author Kohsuke Kawaguchi
	*/
	final class ContainerElement implements InvocationHandler, TypedXmlWriter {

	final Document document;

	/**
	* Initially, point to the start tag token, but
	* once we know we are done with the start tag, we will reset it to null
	* so that the token sequence can be GC-ed.
	*/
	StartTag startTag;
	final EndTag endTag = new EndTag();

	/**
	* Namespace URI of this element.
	*/
	private final String nsUri;

	/**
	* When this element can accept more child content, this value
	* is non-null and holds the last child {@link Content}.
	*
	* If this element is committed, this parameter is null.
	*/
	private Content tail;

	/**
	* Uncommitted {@link ContainerElement}s form a doubly-linked list,
	* so that the parent can close them recursively.
	*/
	private ContainerElement prevOpen;
	private ContainerElement nextOpen;
	private final ContainerElement parent;
	private ContainerElement lastOpenChild;

	/**
	* Set to true if the start eleent is blocked.
	*/
	private boolean blocked;

	public ContainerElement(Document document,ContainerElement parent,String nsUri, String localName) {
	this.parent = parent;
	this.document = document;
	this.nsUri = nsUri;
	this.startTag = new StartTag(this,nsUri,localName);
	tail = startTag;

	if(isRoot())
	document.setFirstContent(startTag);
	}

	private boolean isRoot() {
	return parent==null;
	}

	private boolean isCommitted() {
	return tail==null;
	}

	public Document getDocument() {
	return document;
	}

	boolean isBlocked() {
	return blocked && !isCommitted();
	}

	public void block() {
	blocked = true;
	}

	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
	if(method.getDeclaringClass()==TypedXmlWriter.class \|\| method.getDeclaringClass()==Object.class) {
	// forward to myself
	try {
	return method.invoke(this,args);
	} catch (InvocationTargetException e) {
	throw e.getTargetException();
	}
	}

	XmlAttribute xa = method.getAnnotation(XmlAttribute.class);
	XmlValue xv = method.getAnnotation(XmlValue.class);
	XmlElement xe = method.getAnnotation(XmlElement.class);


	if(xa!=null) {
	if(xv!=null \|\| xe!=null)
	throw new IllegalAnnotationException(method.toString());

	addAttribute(xa,method,args);
	return proxy; // allow method chaining
	}
	if(xv!=null) {
	if(xe!=null)
	throw new IllegalAnnotationException(method.toString());

	_pcdata(args);
	return proxy; // allow method chaining
	}

	return addElement(xe,method,args);
	}

	/**
	* Writes an attribute.
	*/
	private void addAttribute(XmlAttribute xa, Method method, Object[] args) {
	assert xa!=null;

	checkStartTag();

	String localName = xa.value();
	if(xa.value().length()==0)
	localName = method.getName();

	_attribute(xa.ns(),localName,args);
	}

	private void checkStartTag() {
	if(startTag==null)
	throw new IllegalStateException("start tag has already been written");
	}

	/**
	* Writes a new element.
	*/
	private Object addElement(XmlElement e, Method method, Object[] args) {
	Class<?> rt = method.getReturnType();

	// the last precedence: default name
	String nsUri = "##default";
	String localName = method.getName();

	if(e!=null) {
	// then the annotation on this method
	if(e.value().length()!=0)
	localName = e.value();
	nsUri = e.ns();
	}

	if(nsUri.equals("##default")) {
	// look for the annotation on the declaring class
	Class<?> c = method.getDeclaringClass();
	XmlElement ce = c.getAnnotation(XmlElement.class);
	if(ce!=null) {
	nsUri = ce.ns();
	}

	if(nsUri.equals("##default"))
	// then default to the XmlNamespace
	nsUri = getNamespace(c.getPackage());
	}



	if(rt==Void.TYPE) {
	// leaf element with just a value

	boolean isCDATA = method.getAnnotation(XmlCDATA.class)!=null;

	StartTag st = new StartTag(document,nsUri,localName);
	addChild(st);
	for( Object arg : args ) {
	Text text;
	if(isCDATA) text = new Cdata(document,st,arg);
	else text = new Pcdata(document,st,arg);
	addChild(text);
	}
	addChild(new EndTag());
	return null;
	}
	if(TypedXmlWriter.class.isAssignableFrom(rt)) {
	// sub writer
	return _element(nsUri,localName,(Class)rt);
	}

	throw new IllegalSignatureException("Illegal return type: "+rt);
	}

	/**
	* Decides the namespace URI of the given package.
	*/
	private String getNamespace(Package pkg) {
	if(pkg==null) return "";

	String nsUri;
	XmlNamespace ns = pkg.getAnnotation(XmlNamespace.class);
	if(ns!=null)
	nsUri = ns.value();
	else
	nsUri = "";
	return nsUri;
	}

	/**
	* Appends this child object to the tail.
	*/
	private void addChild(Content child) {
	tail.setNext(document,child);
	tail = child;
	}

	public void commit() {
	commit(true);
	}

	public void commit(boolean includingAllPredecessors) {
	_commit(includingAllPredecessors);
	document.flush();
	}

	private void _commit(boolean includingAllPredecessors) {
	if(isCommitted()) return;

	addChild(endTag);
	if(isRoot())
	addChild(new EndDocument());
	tail = null;

	// _commit predecessors if so told
	if(includingAllPredecessors) {
	for( ContainerElement e=this; e!=null; e=e.parent ) {
	while(e.prevOpen!=null) {
	e.prevOpen._commit(false);
	// e.prevOpen should change as a result of committing it.
	}
	}
	}

	// _commit all children recursively
	while(lastOpenChild!=null)
	lastOpenChild._commit(false);

	// remove this node from the link
	if(parent!=null) {
	if(parent.lastOpenChild==this) {
	assert nextOpen==null : "this must be the last one";
	parent.lastOpenChild = prevOpen;
	} else {
	assert nextOpen.prevOpen==this;
	nextOpen.prevOpen = this.prevOpen;
	}
	if(prevOpen!=null) {
	assert prevOpen.nextOpen==this;
	prevOpen.nextOpen = this.nextOpen;
	}
	}

	this.nextOpen = null;
	this.prevOpen = null;
	}

	public void _attribute(String localName, Object value) {
	_attribute("",localName,value);
	}

	public void _attribute(String nsUri, String localName, Object value) {
	checkStartTag();
	startTag.addAttribute(nsUri,localName,value);
	}

	public void _attribute(QName attributeName, Object value) {
	_attribute(attributeName.getNamespaceURI(),attributeName.getLocalPart(),value);
	}

	public void _namespace(String uri) {
	_namespace(uri,false);
	}

	public void _namespace(String uri, String prefix) {
	if(prefix==null)
	throw new IllegalArgumentException();
	checkStartTag();
	startTag.addNamespaceDecl(uri,prefix,false);
	}

	public void _namespace(String uri, boolean requirePrefix) {
	checkStartTag();
	startTag.addNamespaceDecl(uri,null,requirePrefix);
	}

	public void _pcdata(Object value) {
	// we need to allow this method even when startTag has already been completed.
	// checkStartTag();
	addChild(new Pcdata(document,startTag,value));
	}

	public void _cdata(Object value) {
	addChild(new Cdata(document,startTag,value));
	}

	public void _comment(Object value) throws UnsupportedOperationException {
	addChild(new Comment(document,startTag,value));
	}

	public <T extends TypedXmlWriter> T _element(String localName, Class<T> contentModel) {
	return _element(nsUri,localName,contentModel);
	}

	public <T extends TypedXmlWriter> T _element(QName tagName, Class<T> contentModel) {
	return _element(tagName.getNamespaceURI(),tagName.getLocalPart(),contentModel);
	}

	public <T extends TypedXmlWriter> T _element(Class<T> contentModel) {
	return _element(TXW.getTagName(contentModel),contentModel);
	}

	public <T extends TypedXmlWriter> T _cast(Class<T> facadeType) {
	return facadeType.cast(Proxy.newProxyInstance(facadeType.getClassLoader(),new Class[]{facadeType},this));
	}

	public <T extends TypedXmlWriter> T _element(String nsUri, String localName, Class<T> contentModel) {
	ContainerElement child = new ContainerElement(document,this,nsUri,localName);
	addChild(child.startTag);
	tail = child.endTag;

	// update uncommitted link list
	if(lastOpenChild!=null) {
	assert lastOpenChild.parent==this;

	assert child.prevOpen==null;
	assert child.nextOpen==null;
	child.prevOpen = lastOpenChild;
	assert lastOpenChild.nextOpen==null;
	lastOpenChild.nextOpen = child;
	}

	this.lastOpenChild = child;

	return child._cast(contentModel);
	}
	}