/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jsp;
import com.caucho.jsp.java.JspTagFileSupport;
import com.caucho.util.L10N;
import com.caucho.xml.QName;
import javax.servlet.jsp.tagext.SimpleTag;
import javax.servlet.jsp.tagext.TagAttributeInfo;
import javax.servlet.jsp.tagext.TagInfo;
import javax.servlet.jsp.tagext.VariableInfo;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.logging.Logger;
/**
* Describes a single tag instance.
*/
public class TagInstance {
static final L10N L = new L10N(TagInstance.class);
private static final Logger log
= Logger.getLogger(TagInstance.class.getName());
// Special object to note that the attribute varies
private static final Object VARIES = new Varies();
public static final String TOP_TAG = null;
public static final String FRAGMENT_WITH_TAG_PARENT = "top_tag_fragment";
public static final String FRAGMENT_WITH_SIMPLE_PARENT = "top_simple_fragment";
private ParseTagManager _manager;
private TagInstance _top;
private TagInfo _tagInfo;
private int _maxId;
private TagInstance _parent;
private ArrayList<TagInstance> _children = new ArrayList<TagInstance>();
private ArrayList<TagInstance> _tags = new ArrayList<TagInstance>();
private JspGenerator _gen;
private String _tagId = null;
private QName _qname;
private Class _cl;
private VariableInfo []_varInfo;
private boolean _needsAdapter;
private boolean _hasAdapterDeclaration;
private AnalyzedTag _analyzedTag;
private ArrayList<QName> _attributeNames = new ArrayList<QName>();
private ArrayList<Object> _attributeValues = new ArrayList<Object>();
private boolean _hasBodyContent;
public TagInstance(ParseTagManager manager)
{
_manager = manager;
_top = this;
_tagId = null;
}
public TagInstance(ParseTagManager manager,
String id)
{
_manager = manager;
_top = this;
_tagId = id;
}
TagInstance(JspGenerator gen,
TagInstance parent,
TagInfo tagInfo,
QName qname,
Class cl)
{
_gen = gen;
_qname = qname;
_parent = parent;
_manager = parent._manager;
_tagInfo = tagInfo;
_cl = cl;
_top = parent._top;
parent._children.add(this);
_top._tags.add(this);
if (tagInfo != null) {
String className = tagInfo.getTagClassName();
int p = className.lastIndexOf('.');
if (p >= 0)
className = className.substring(p + 1);
_tagId = "_jsp_" + className + "_" + _gen.uniqueId();
}
_analyzedTag = _manager.analyzeTag(cl);
}
/**
* Returns the tag name
*/
public QName getQName()
{
return _qname;
}
/**
* Returns the tag name
*/
public String getName()
{
return _qname.getName();
}
public String getId()
{
return _tagId;
}
public void setId(String id)
{
_tagId = id;
}
public boolean generateAdapterDeclaration()
{
if (_hasAdapterDeclaration) {
return false;
}
else {
_hasAdapterDeclaration = true;
return true;
}
}
public TagInstance getParent()
{
return _parent;
}
/**
* Returns true for a top tag.
*/
public boolean isTop()
{
return _tagId == null || _tagId.startsWith("top_");
}
/**
* Returns the tag class.
*/
public Class getTagClass()
{
return _cl;
}
/**
* Returns true if it's a simple tag.
*/
public boolean isSimpleTag()
{
return _cl != null && SimpleTag.class.isAssignableFrom(_cl);
}
/**
* Returns true if it's a simple tag.
*/
public boolean isTagFileTag()
{
return _cl != null && JspTagFileSupport.class.isAssignableFrom(_cl);
}
public TagInfo getTagInfo()
{
return _tagInfo;
}
/**
* Returns the analyzed tag.
*/
public AnalyzedTag getAnalyzedTag()
{
return _analyzedTag;
}
void setVarInfo(VariableInfo []varInfo)
{
_varInfo = varInfo;
}
public VariableInfo []getVarInfo()
{
return _varInfo;
}
public int size()
{
return _top._maxId;
}
/**
* Returns true if there are children.
*/
public boolean hasChildren()
{
return _children != null && _children.size() > 0;
}
/**
* Set true if needs an adapter.
*/
public boolean getNeedsAdapter()
{
return _needsAdapter || isSimpleTag() && hasChildren();
}
/**
* if needs an adapter.
*/
public void setNeedsAdapter(boolean needsAdapter)
{
_needsAdapter = needsAdapter;
}
/**
* Iterates through the children.
*/
public Iterator<TagInstance> iterator()
{
return _children.iterator();
}
/**
* Iterates through the children.
*/
public TagInstance get(int i)
{
return _top._tags.get(i);
}
/**
* Returns the tag's attribute names.
*/
public ArrayList<QName> getAttributeNames()
{
return _attributeNames;
}
/**
* Set true if the tag has a body content.
*/
public void setBodyContent(boolean hasBodyContent)
{
_hasBodyContent = hasBodyContent;
}
/**
* Get true if the tag has a body content.
*/
public boolean getBodyContent()
{
return _hasBodyContent;
}
/**
* Adds a child tag. If the tag exists, just reuse it.
*
* @param tagName the JSP name of the tag
* @param tagInfo the TagInfo structure for the tag
* @param cl the tag's implementation class
* @param names the array of attribute names
* @param values the array of attribute values
*/
public TagInstance addTag(JspGenerator gen,
QName tagName,
TagInfo tagInfo,
Class cl,
ArrayList<QName> names,
ArrayList<Object> values,
boolean hasBodyContent)
{
TagInstance child = null;//findTag(tagName, names);
if (child == null)
child = new TagInstance(gen, this, tagInfo, tagName, cl);
child.setBodyContent(hasBodyContent);
for (int i = 0; i < names.size(); i++) {
QName name = names.get(i);
Object value = values.get(i);
if (value instanceof String) {
String strValue = (String) value;
// runtime and EL expressions can't have shared values
if (strValue.startsWith("<%=") || strValue.startsWith("%="))
value = null;
else if (strValue.indexOf("${") >= 0)
value = null;
else if (strValue.indexOf("#{") >= 0) {
// jsp/1cn1 - the expression can depend on the context
value = null;
}
child.addAttribute(name, value);
} else {
child.addAttribute(name, null);
}
}
return child;
}
/**
* Adds a new tag. Always create a new tag.
*/
public TagInstance addNewTag(JspGenerator gen,
QName tagName,
TagInfo tagInfo,
Class cl,
ArrayList<QName> names,
ArrayList<String> values,
boolean hasBodyContent)
{
TagInstance child = null;
if (child == null)
child = new TagInstance(gen, this, tagInfo, tagName, cl);
child.setBodyContent(hasBodyContent);
for (int i = 0; i < names.size(); i++) {
QName name = names.get(i);
String value = values.get(i);
if (value.startsWith("<%=") || value.startsWith("%="))
value = null;
child.addAttribute(name, value);
}
return child;
}
/**
* Sets the attribute. Null values can't be pre-cached.
*/
public void addAttribute(QName name, Object value)
{
for (int i = 0; i < _attributeNames.size(); i++) {
QName attrName = _attributeNames.get(i);
if (attrName.equals(name)) {
Object oldValue = _attributeValues.get(i);
if (value == null || oldValue == null || ! value.equals(oldValue))
_attributeValues.set(i, null);
return;
}
}
if (name == null)
throw new NullPointerException();
_attributeNames.add(name);
_attributeValues.add(value);
}
public String getAttribute(QName name)
{
for (int i = 0; i < _attributeNames.size(); i++) {
if (name.equals(_attributeNames.get(i)))
return (String) _attributeValues.get(i);
}
return null;
}
boolean canBeRequestTime(String name)
{
TagAttributeInfo attrs[] = _tagInfo.getAttributes();
if (attrs == null)
return true;
for (int i = 0; i < attrs.length; i++) {
if (name.equals(attrs[i].getName()))
return attrs[i].canBeRequestTime();
}
return false;
}
public TagAttributeInfo getAttributeInfo(String name)
{
if (_tagInfo == null)
return null;
TagAttributeInfo attrs[] = _tagInfo.getAttributes();
if (attrs == null)
return null;
for (int i = 0; i < attrs.length; i++) {
if (name.equals(attrs[i].getName()))
return attrs[i];
}
return null;
}
/**
* Finds the matching tag.
*/
public TagInstance findTag(QName tagName,
ArrayList<QName> names,
boolean hasBodyContent)
{
for (int i = 0; i < _children.size(); i++) {
TagInstance child = _children.get(i);
if (child.match(tagName, names, hasBodyContent))
return child;
}
return null;
}
/**
* Returns true for matching instances.
*/
boolean match(QName tagName, ArrayList<QName> names, boolean hasBodyContent)
{
if (! _qname.equals(tagName))
return false;
if (_attributeNames.size() != names.size())
return false;
if (_hasBodyContent != hasBodyContent)
return false;
for (int i = 0; i < _attributeNames.size(); i++) {
QName attrName = _attributeNames.get(i);
if (names.indexOf(attrName) < 0)
return false;
}
for (int i = 0; i < names.size(); i++) {
QName name = names.get(i);
if (_attributeNames.indexOf(name) < 0)
return false;
}
return true;
}
static class Varies {
public String toString()
{
return "Value-Varies[]";
}
}
}