org.zkoss.zk.ui.metainfo.PageDefinition Maven / Gradle / Ivy
/* PageDefinition.java
Purpose:
Description:
History:
Tue May 31 11:27:07 2005, Created by tomyeh
Copyright (C) 2005 Potix Corporation. All Rights Reserved.
{{IS_RIGHT
This program is distributed under LGPL Version 2.1 in the hope that
it will be useful, but WITHOUT ANY WARRANTY.
}}IS_RIGHT
*/
package org.zkoss.zk.ui.metainfo;
import java.util.Iterator;
import java.util.List;
import java.util.LinkedList;
import java.util.Collections;
import java.util.Collection;
import java.util.Map;
import java.util.HashMap;
import java.util.LinkedHashMap;
import org.zkoss.lang.ClassResolver;
import org.zkoss.lang.ImportedClassResolver;
import org.zkoss.util.resource.Locator;
import org.zkoss.xel.ExpressionFactory;
import org.zkoss.xel.Expressions;
import org.zkoss.xel.Function;
import org.zkoss.xel.VariableResolver;
import org.zkoss.xel.FunctionMapper;
import org.zkoss.xel.taglib.Taglibs;
import org.zkoss.xel.taglib.Taglib;
import org.zkoss.xel.taglib.FunctionDefinition;
import org.zkoss.html.HTMLs;
import org.zkoss.zk.ui.Page;
import org.zkoss.zk.ui.UiException;
import org.zkoss.zk.ui.util.Initiator;
import org.zkoss.zk.ui.sys.PageCtrl;
import org.zkoss.zk.ui.sys.PageConfig;
import org.zkoss.zk.xel.Evaluator;
import org.zkoss.zk.xel.ExValue;
import org.zkoss.zk.xel.impl.SimpleEvaluator;
import org.zkoss.zk.xel.EvaluatorRef;
/**
* A page definition.
* It represents a ZUL page.
*
* Note: it is not thread-safe.
*
*
Note: it is not serializable.
*
* @author tomyeh
* @see ComponentDefinition
*/
public class PageDefinition implements NodeInfo {
/** A list of a children ({@link NodeInfo}). */
private final List _children = new LinkedList();
private final LanguageDefinition _langdef;
private final Locator _locator;
private String _id, _title, _style, _viewport;
/** The request path. */
private String _path = "";
/** The zscript language. */
private String _zslang = "Java";
private List _taglibs;
/** A map of imported classes for expression, Map. */
private Map> _expimps;
/** A list of XEL methods, List. */
private List _xelfuncs;
/** The evaluator. */
private Evaluator _eval;
/** The evaluator reference. */
private EvaluatorRef _evalr;
/** The function mapper. */
private FunctionMapper _mapper;
/* List(InitiatorInfo). */
private List _initdefs;
/** List(VariableResolverInfo). */
private List _resolvdefs;
/** List(FunctionMapperInfo mapper). */
private List _mapperdefs;
/** List(HeaderInfo). They are generated before ZK default headers, such as meta. */
private List _hdBfrDefs;
/** List(HeaderInfo). They are generated after ZK default headers. */
private List _hdAftDefs;
/** List(ResponseHeaderInfo). */
private List _hdResDefs;
/** List(ForwardInfo). */
private List _forwdefs;
/** Map(String name, ExValue value). */
private Map _rootAttrs;
private ExValue _contentType, _docType, _firstLine, _wgtcls;
/** The class of the expression factory (ExpressionFactory).*/
private Class _expfcls;
/** The class resolver. */
private final ImportedClassResolver _clsresolver = new ImportedClassResolver();
private final ComponentDefinitionMap _compdefs;
private Boolean _cacheable;
private Boolean _autoTimeout;
private boolean _complete;
/** Constructor.
* @param langdef the default language which is used if no namespace
* is specified. Note: a page might have components from different
* languages.
*/
public PageDefinition(LanguageDefinition langdef, Locator locator) {
if (langdef == null)
throw new IllegalArgumentException("null langdef");
if (locator == null)
throw new IllegalArgumentException("null locator");
_langdef = langdef;
_locator = locator;
_compdefs = new ComponentDefinitionMap(
_langdef.getComponentDefinitionMap().isCaseInsensitive());
}
/** Constructor.
* @param langdef the default language which is used if no namespace
* is specified. Note: a page might have components from different
* languages.
* @param id the identifier. See {@link #setId}.
* @param title the title. See {@link #setTitle}.
* @param style the CSS style. See {@link #setStyle}.
*/
public PageDefinition(LanguageDefinition langdef, String id, String title,
String style, Locator locator) {
this(langdef, locator);
setId(id);
setTitle(title);
setStyle(style);
}
/** Returns the language definition that this page is default to be.
*/
public LanguageDefinition getLanguageDefinition() {
return _langdef;
}
/** Returns the locator associated with this page definition.
*/
public Locator getLocator() {
return _locator;
}
/** Returns the default scripting language which is assumed when
* a zscript element doesn't specify any language.
*
* Default: Java.
*/
public String getZScriptLanguage() {
return _zslang;
}
/** Sets the default scripting language which is assumed when
* a zscript element doesn't specify any language.
*
* @param zslang the default scripting language.
*/
public void setZScriptLanguage(String zslang) {
if (zslang == null || zslang.length() == 0)
throw new IllegalArgumentException("null or empty");
_zslang = zslang;
}
/** Returns the identifier that will be assigned to pages created from
* this definition, or null if the identifier shall be generated automatically.
*
Note: the returned value might contain EL expressions.
*/
public String getId() {
return _id;
}
/** Sets the identifier that will be assigned to pages created from this
* definition.
* @param id the identifier. It might contain EL expressions.
* If null or empty (null is assumed), page's ID is generated automatically.
* If not empty, ID (after evaluated) must be unique in the same request.
*/
public void setId(String id) {
_id = id != null && id.length() > 0 ? id: null;
}
/** Returns the title that will be assigned to pages created from
* this definition, or null if no title is assigned at the beginning.
*
Note: the returned value might contain EL expressions.
*/
public String getTitle() {
return _title;
}
/** Sets the title that will be assigned to pages created from
* this definition, or null if no title is assigned at the beginning.
* @param title the title. If empty, null is assumed.
*/
public void setTitle(String title) {
_title = title != null && title.length() > 0 ? title: null;
}
/** Returns the CSS style that will be assigned to pages created from
* this definition, or null if no style is assigned at the beginning.
*
Note: the returned value might contain EL expressions.
*/
public String getStyle() {
return _style;
}
/** Sets the CSS style that will be assigned to pages created from
* this definition, or null if no style is assigned at the beginning.
* @param style the CSS style. If empty, null is assumed.
*/
public void setStyle(String style) {
_style = style != null && style.length() > 0 ? style: null;
}
/** Returns the viewport that will be assigned to pages created from
* this definition, or "auto" if no viewport is assigned at the beginning.
*
Note: the returned value might contain EL expressions.
* @since 6.5.0
*/
public String getViewport() {
return _viewport;
}
/** Sets the viewport that will be assigned to pages created from
* this definition, or "auto" if no viewport is assigned at the beginning.
* @param viewport the viewport setting. If empty, "auto" is assumed.
* @since 6.5.0
*/
public void setViewport(String viewport) {
_viewport = viewport != null && viewport.length() > 0 ? viewport: "auto";
}
/** Returns the widget class of the given page, or null if the default is used.
* @since 5.0.5
*/
public String getWidgetClass(Page page) {
return _wgtcls != null ?
(String)_wgtcls.getValue(_evalr, page): null;
}
/** Sets the widget class of the page.
* @param wgtcls the widget class. It may contain EL expressions.
* If null or empty, the default widget class is assumed.
* @since 5.0.5
*/
public void setWidgetClass(String wgtcls) {
_wgtcls = wgtcls != null && wgtcls.length() > 0 ?
new ExValue(wgtcls, String.class): null;
}
/** Returns the request path of this page definition, or ""
* if not available.
*
It is the same as the servlet path
* (javax.servlet.http.HttpServletRequest's getServletPath), if ZK is running
* at a servlet container.
*/
public String getRequestPath() {
return _path;
}
/** Sets the request path of this page definition.
*/
public void setRequestPath(String path) {
_path = path != null ? path: "";
}
/** Imports the specified directives from the specified page definition.
*
* @param pgdef the page definition to import from.
* @param directives an array of the directive names to import.
* If null, {"init", "component"} is assumed, i.e., only the init
* directives and component definitions are imported.
* Importable directives include "component", "init", "meta",
* "taglib", "variable-resolver", and "xel-method".
* If "*", all of them are imported.
* Note: "meta" implies "link".
* @since 3.0.2
*/
public void imports(PageDefinition pgdef, String[] directives) {
if (directives == null || contains(directives, "import"))
_clsresolver.addAll(pgdef._clsresolver);
if (pgdef._initdefs != null
&& (directives == null || contains(directives, "init")))
for (InitiatorInfo ii: pgdef._initdefs)
addInitiatorInfo(ii);
if (directives == null || contains(directives, "component")) {
for (Iterator it = pgdef._compdefs.getNames().iterator();
it.hasNext();)
addComponentDefinition(pgdef._compdefs.get((String)it.next()));
}
if (pgdef._taglibs != null
&& directives != null && contains(directives, "taglib"))
for (Taglib tl: pgdef._taglibs)
addTaglib(tl);
if (pgdef._resolvdefs != null
&& directives != null && contains(directives, "variable-resolver")) {
for (VariableResolverInfo vri: pgdef._resolvdefs)
addVariableResolverInfo(vri);
}
if (pgdef._mapperdefs != null
&& directives != null && contains(directives, "function-mapper")) {
for (FunctionMapperInfo fmi: pgdef._mapperdefs)
addFunctionMapperInfo(fmi);
}
if (pgdef._xelfuncs != null
&& directives != null && contains(directives, "xel-method"))
for (FunctionDefinition xfi: pgdef._xelfuncs)
addXelMethod(xfi.prefix, xfi.name, xfi.function);
if (pgdef._hdBfrDefs != null
&& directives != null && contains(directives, "meta")) {
for (HeaderInfo hi: pgdef._hdBfrDefs)
addHeaderInfo(hi, true);
}
if (pgdef._hdAftDefs != null
&& directives != null && contains(directives, "meta")) {
for (HeaderInfo hi: pgdef._hdAftDefs)
addHeaderInfo(hi, false);
}
if (pgdef._hdResDefs != null
&& directives != null && contains(directives, "header")) {
for (ResponseHeaderInfo rhi: pgdef._hdResDefs)
addResponseHeaderInfo(rhi);
}
}
private static boolean contains(String[] dirs, String dir) {
for (int j = dirs.length; --j >= 0;)
if ("*".equals(dirs[j]) || dir.equalsIgnoreCase(dirs[j]))
return true;
return false;
}
/** Imports the init directives and component definitions from
* the specified page definition.
*
*
It is the same as imports(pgdef, null).
*
* @since #imports(PageDefinition, String[])
*/
public void imports(PageDefinition pgdef) {
imports(pgdef, null);
}
/** Adds an imported class
* Like Java, it is used to import a class or a package of classes, so
* that it simplifies the use of the apply attribute, the init directive
* and others.
*
* @param clsptn the class's fully-qualified name, e.g., com.foo.FooComposer,
* a wildcard representing all classes of the give package, e.g., com.foo.*.
* @since 6.0.0
*/
public void addImportedClass(String clsptn) throws ClassNotFoundException {
_clsresolver.addImportedClass(clsptn);
}
/** Returns a readonly list of the imported class names.
* @since 6.0.0
*/
public List getImportedClasses() {
return _clsresolver.getImportedClasses();
}
/** Returns the class resolver represented by {@link #getImportedClasses}.
* @since 6.0.0
*/
public ClassResolver getImportedClassResolver() {
return _clsresolver;
}
/** Adds a definition of {@link Initiator}. */
public void addInitiatorInfo(InitiatorInfo init) {
if (init == null)
throw new IllegalArgumentException("null");
if (_initdefs == null)
_initdefs = new LinkedList();
_initdefs.add(init);
}
/** Returns a list of all {@link Initiator} and invokes
* its {@link Initiator#doInit} before returning.
* It never returns null.
*/
public List doInit(Page page) {
if (_initdefs == null)
return Collections.emptyList();
final List inits = new LinkedList();
try {
for (InitiatorInfo ii: _initdefs) {
final Initiator init = ii.newInitiator(getEvaluator(), page);
if (init != null) inits.add(init);
}
} catch (Throwable ex) {
throw UiException.Aide.wrap(ex);
}
return inits;
}
/** Adds a definition of {@link VariableResolver}.
*/
public void addVariableResolverInfo(VariableResolverInfo resolver) {
if (resolver == null)
throw new IllegalArgumentException("null");
if (_resolvdefs == null)
_resolvdefs = new LinkedList();
_resolvdefs.add(resolver);
}
/** Adds a definition of {@link FunctionMapper}.
* @since 3.5.0
*/
public void addFunctionMapperInfo(FunctionMapperInfo mapper) {
if (mapper == null)
throw new IllegalArgumentException("null");
if (_mapperdefs == null)
_mapperdefs = new LinkedList();
_mapperdefs.add(mapper);
}
/** Adds a XEL method.
*
* @param prefix the prefix of the method name
* @param name the method name. The final name is "prefix:name"
* @param func the function.
* @since 3.0.0
*/
public void addXelMethod(String prefix, String name, Function func) {
checkXelModifiable();
if (name == null || prefix == null || func == null)
throw new IllegalArgumentException();
if (_xelfuncs == null)
_xelfuncs = new LinkedList();
_xelfuncs.add(new FunctionDefinition(prefix, name, func));
}
/** Adds a response header.
* @since 5.0.2
*/
public void addResponseHeaderInfo(ResponseHeaderInfo header) {
if (header == null)
throw new IllegalArgumentException();
if (_hdResDefs == null)
_hdResDefs = new LinkedList();
_hdResDefs.add(header);
}
/** Returns a map of response headers (never null).
* The value of each entry is a two-element object array. The
* first element of the array is the value which is an instance of {@link java.util.Date}
* or {@link String} (and never null).
* The second element indicates whether to add (rather than set)
* header. It is an instance of Boolean (and never null).
*/
public Collection getResponseHeaders(Page page) {
final List headers = new LinkedList();
if (_hdResDefs != null)
for (ResponseHeaderInfo rhi: _hdResDefs) {
headers.add(new Object[] {
rhi.getName(), rhi.getValue(this, page),
Boolean.valueOf(rhi.shallAppend(this, page))});
}
return headers;
}
/** Adds a header definition ({@link HeaderInfo}).
* @param before whether to place the header before ZK's
* CSS/JS headers. If false, it is placed after ZK's CSS/JS headers.
* @since 3.6.1
*/
public void addHeaderInfo(HeaderInfo header, boolean before) {
if (header == null)
throw new IllegalArgumentException();
if (before) {
if (_hdBfrDefs == null)
_hdBfrDefs = new LinkedList();
_hdBfrDefs.add(header);
} else {
if (_hdAftDefs == null)
_hdAftDefs = new LinkedList();
_hdAftDefs.add(header);
}
}
/** Adds a header definition ({@link HeaderInfo}).
* It places the meta headers before ZK's CSS/JS headers,
* and others after ZK's CSS/JS headers.
*/
public void addHeaderInfo(HeaderInfo header) {
addHeaderInfo(header, "meta".equals(header.getName()));
}
/** Returns the content that shall be generated inside the head element
* and before ZK's default tags (never null).
* For example, it might consist of <meta> and <link>.
*
* Since it is generated before ZK's default tags (such as CSS and JS),
* it cannot override ZK's default behaviors.
*
* @see #getAfterHeadTags
* @since 5.0.5
*/
public String getBeforeHeadTags(Page page) {
return getHeadTags(page, _hdBfrDefs);
}
/** Returns the content that shall be generated inside the head element
* and after ZK's default tags (never null).
* For example, it might consist of <meta> and <link>.
*
*
Since it is generated after ZK's default tags (such as CSS and JS),
* it could override ZK's default behaviors.
*
* @see #getBeforeHeadTags
* @since 5.0.5
*/
public String getAfterHeadTags(Page page) {
return getHeadTags(page, _hdAftDefs);
}
private String getHeadTags(Page page, List defs) {
if (defs == null)
return "";
final StringBuffer sb = new StringBuffer(256);
for (HeaderInfo hi: defs) {
final String s = hi.toHTML(this, page);
if (s != null && s.length() > 0)
sb.append(s).append('\n');
}
return sb.toString();
}
/** Adds a forward definition ({@link ForwardInfo}).
*/
public void addForwardInfo(ForwardInfo forward) {
if (forward == null)
throw new IllegalArgumentException("null");
if (_forwdefs == null)
_forwdefs = new LinkedList();
_forwdefs.add(forward);
}
/** Returns the URI to forward to, or null if not to forward.
* It evaluates the forward definition (added by {@link #addForwardInfo})
* one-by-one, if any, to see whether to forward.
* Returns null if no forward definition, or no forward definition's
* condition is satisfied.
*/
public String getForwardURI(Page page) {
if (_forwdefs == null)
return null;
for (ForwardInfo fi: _forwdefs) {
final String uri = fi.resolveURI(this, page);
if (uri != null)
return uri;
}
return null;
}
/** Returns the content type (after evaluation),
* or null to use the device default.
*
* @param page the page used to evaluate EL expressions, if any
* @since 3.0.0
*/
public String getContentType(Page page) {
return _contentType != null ?
(String)_contentType.getValue(_evalr, page): null;
}
/** Sets the content type.
*
* Default: null (use the device default).
*
* @param contentType the content type. It may contain EL expressions.
* @since 3.0.0
*/
public void setContentType(String contentType) {
_contentType = contentType != null && contentType.length() > 0 ?
new ExValue(contentType, String.class): null;
}
/** Returns the doc type (<!DOCTYPE>) (after evaluation),
* or null to use the device default.
*
* @param page the page used to evaluate EL expressions, if any
* @since 3.0.0
*/
public String getDocType(Page page) {
return _docType != null ? (String)_docType.getValue(_evalr, page): null;
}
/** Sets the doc type (<!DOCTYPE>).
*
*
Default: null (use the device default).
*
* @param docType the doc type. It may contain EL expressions.
* If null, it means device's default will be used.
* If empty, it means no doc type will be generated.
* @since 3.0.0
*/
public void setDocType(String docType) {
_docType = docType != null ? new ExValue(docType, String.class): null;
}
/** Returns the first line to be generated to the output
* (after evaluation), or null if nothing to generate.
*
*
For XML devices, it is usually the xml processing instruction:
* <?xml version="1.0" encoding="UTF-8"?>
*
* @param page the page used to evaluate EL expressions, if any
* @since 3.0.0
*/
public String getFirstLine(Page page) {
return _firstLine != null ?
(String)_firstLine.getValue(_evalr, page): null;
}
/** Sets the first line to be generated to the output.
*
* Default: null (i.e., nothing generated)
* @since 3.0.0
*/
public void setFirstLine(String firstLine) {
_firstLine = firstLine != null && firstLine.length() > 0 ?
new ExValue(firstLine, String.class): null;
}
/** Returns if the client can cache the rendered result, or null
* to use the device default.
*
* @since 3.0.0
*/
public Boolean getCacheable() {
return _cacheable;
}
/** Sets if the client can cache the rendered result.
*
*
Default: null (use the device default).
* @since 3.0.0
*/
public void setCacheable(Boolean cacheable) {
_cacheable = cacheable;
}
/** Returns whether to automatically redirect to the timeout URI.
*
* @see #setAutomaticTimeout
* @since 3.6.3
*/
public Boolean getAutomaticTimeout() {
return _autoTimeout;
}
/** Sets whether to automatically redirect to the timeout URI.
*
*
Default: null (use the device default).
* Refer to {@link org.zkoss.zk.ui.util.Configuration#setAutomaticTimeout}
* for details.
* @since 3.6.3
*/
public void setAutomaticTimeout(Boolean autoTimeout) {
_autoTimeout = autoTimeout;
}
/** Returns if the page is a complete page.
* By complete we mean the page has everything that the client expects.
* For example, for HTML output, the page will generate
* the HTML, HEAD and BODY tags.
*
*
By default (false), we assume a page is complete if and only if
* it is not included by other page.
*
*
If you have a page that has a complete HTML page and
* it is included by other page, you have to specify the complete flag
* to be true.
* @since 3.0.4
*/
public boolean isComplete() {
return _complete;
}
/** Sets if the page is a complete page.
*
Default: false. It means a page is complete if and only if it
* is not included by other page.
*
* @param complete whether the page is complete.
* If true, this page is assumed to be complete no matter it is included
* or not. If false, this page is assumed to be complete if it is
* not included by other page.
* @see #isComplete
* @since 3.0.4
*/
public void setComplete(boolean complete) {
_complete = complete;
}
/** Adds a root attribute.
* The previous attribute of the same name will be replaced.
*
* @param value the value. If null, the attribute is removed.
* It can be an EL expression.
* @since 3.0.0
*/
public void setRootAttribute(String name, String value) {
if (name == null || name.length() == 0)
throw new IllegalArgumentException();
if (_rootAttrs == null) {
if (value == null)
return; //nothing to
_rootAttrs = new LinkedHashMap();
}
if (value == null) _rootAttrs.remove(name);
else _rootAttrs.put(name, new ExValue(value, String.class));
}
/** Converts the header definitions (added by {@link #setRootAttribute})
* to the attributes of the root element.
* For HTML, the root element is the HTML element.
* @since 3.0.0
*/
public String getRootAttributes(Page page) {
if (_rootAttrs == null || _rootAttrs.isEmpty())
return "";
final Evaluator eval = getEvaluator();
final StringBuffer sb = new StringBuffer(256);
for (Map.Entry me: _rootAttrs.entrySet()) {
final String val = (String)me.getValue().getValue(eval, page);
if (val != null)
HTMLs.appendAttribute(sb, me.getKey(), val);
}
return sb.toString();
}
/** Returns the map of component definition (never null).
*/
public ComponentDefinitionMap getComponentDefinitionMap() {
return _compdefs;
}
/** Adds a component definition belonging to this page definition only.
*
* It is the same as calling {@link ComponentDefinitionMap#add}
* against {@link #getComponentDefinitionMap}
*/
public void addComponentDefinition(ComponentDefinition compdef) {
final LanguageDefinition langdef = compdef.getLanguageDefinition();
if (langdef != null) {
final LanguageDefinition ld2 = getLanguageDefinition();
if (langdef != ld2
&& !langdef.getDeviceType().equals(ld2.getDeviceType()))
throw new UiException("Component definition, "+compdef
+", does not belong to the same device type of the page definition, "
+ld2.getDeviceType());
}
_compdefs.add(compdef);
}
/** Returns the component definition of the specified name, or null
* if not found.
*
*
Note: unlike {@link LanguageDefinition#getComponentDefinition},
* this method doesn't throw ComponentNotFoundException if not found.
* It just returns null.
*
* @param recurse whether to look up the component from {@link #getLanguageDefinition}
*/
public ComponentDefinition getComponentDefinition(String name, boolean recurse) {
final ComponentDefinition compdef = _compdefs.get(name);
if (!recurse || compdef != null)
return compdef;
try {
return getLanguageDefinition().getComponentDefinition(name);
} catch (DefinitionNotFoundException ex) {
}
return null;
}
/** Returns the component definition of the specified class, or null
* if not found.
*
*
Note: unlike {@link LanguageDefinition#getComponentDefinition},
* this method doesn't throw ComponentNotFoundException if not found.
* It just returns null.
*
* @param recurse whether to look up the component from {@link #getLanguageDefinition}
*/
public ComponentDefinition getComponentDefinition(Class cls, boolean recurse) {
final ComponentDefinition compdef = _compdefs.get(cls);
if (!recurse || compdef != null)
return compdef;
try {
return getLanguageDefinition().getComponentDefinition(cls);
} catch (DefinitionNotFoundException ex) {
}
return null;
}
/** Adds a tag lib. */
public void addTaglib(Taglib taglib) {
checkXelModifiable();
if (taglib == null)
throw new IllegalArgumentException("null");
if (_taglibs == null)
_taglibs = new LinkedList();
_taglibs.add(taglib);
}
/** Adds an imported class to the expression factory.
* @since 3.0.0
*/
public void addExpressionImport(String nm, Class cls) {
checkXelModifiable();
if (nm == null || cls == null)
throw new IllegalArgumentException();
if (_expimps == null)
_expimps = new HashMap>(4);
_expimps.put(nm, cls);
}
private void checkXelModifiable() {
if (_eval != null || _mapper != null)
throw new IllegalStateException("getEvaluator() has been called, and no further change is allowed");
}
/** Sets the implementation of the expression factory that shall
* be used by this page.
*
* Default: null (use the default).
*
* @param expfcls the implementation class, or null to use the default.
* Note: expfcls must implement {@link ExpressionFactory}.
* If null is specified, the class defined in
* {@link org.zkoss.zk.ui.util.Configuration#getExpressionFactoryClass}
* @exception IllegalArgumentException if expfcls does not implement ExpressionFactory
* @since 3.0.0
*/
@SuppressWarnings("unchecked")
public void setExpressionFactoryClass(Class expfcls) {
checkXelModifiable();
if (expfcls != null && !ExpressionFactory.class.isAssignableFrom(expfcls))
throw new IllegalArgumentException(ExpressionFactory.class+" must be implemented: "+expfcls);
_expfcls = (Class)expfcls;
}
/** Returns the implementation of the expression factory that
* is used by this page, or null if
* {@link org.zkoss.zk.ui.util.Configuration#getExpressionFactoryClass}
* is used.
*
* @see #setExpressionFactoryClass
* @since 3.0.0
*/
public Class getExpressionFactoryClass() {
return _expfcls;
}
// (NodeInfo)
public Evaluator getEvaluator() {
if (_eval == null)
_eval = newEvaluator();
return _eval;
}
private Evaluator newEvaluator() {
return new SimpleEvaluator(getTaglibMapper(), _expfcls);
}
// (NodeInfo)
public EvaluatorRef getEvaluatorRef() {
if (_evalr == null)
_evalr = newEvaluatorRef();
return _evalr;
}
private EvaluatorRef newEvaluatorRef() {
return new PageEvalRef(this);
}
/** Returns the mapper representing the functions defined in
* taglib and xel-method.
*
*
Note: it doesn't include the function mapper defined added by
* {@link #addFunctionMapperInfo}.
* @since 3.5.0
*/
public FunctionMapper getTaglibMapper() {
if (_mapper == null) {
_mapper = Taglibs.getFunctionMapper(_taglibs, _expimps, _xelfuncs, _locator);
if (_mapper == null)
_mapper = Expressions.EMPTY_MAPPER;
}
return _mapper != Expressions.EMPTY_MAPPER ? _mapper: null;
}
/** Initializes the context for the given page before rendering
* this page definition.
*
It is called before {@link Initiator#doInit} and {@link #init}.
*
* @param page the page to initialize the context. It cannot be null.
*/
public void preInit(Page page) {
page.addClassResolver(_clsresolver);
page.addFunctionMapper(getTaglibMapper());
if (_mapperdefs != null)
for (Iterator it = _mapperdefs.iterator(); it.hasNext();) {
final FunctionMapperInfo def = (FunctionMapperInfo)it.next();
try {
FunctionMapper mapper =
def.newFunctionMapper(this, page);
if (mapper != null)
page.addFunctionMapper(mapper);
} catch (Throwable ex) {
throw UiException.Aide.wrap(ex);
}
}
if (_resolvdefs != null)
for (Iterator it = _resolvdefs.iterator(); it.hasNext();) {
final VariableResolverInfo def = (VariableResolverInfo)it.next();
try {
VariableResolver resolver =
def.newVariableResolver(this, page);
if (resolver != null)
page.addVariableResolver(resolver);
} catch (Throwable ex) {
throw UiException.Aide.wrap(ex);
}
}
}
/** Initializes a page after execution is activated.
* It setup the identifier and title, and adds it to desktop.
*
It is called after {@link #preInit} and {@link Initiator#doInit}.
*/
public void init(final Page page, final boolean evalHeaders) {
final PageCtrl pageCtrl = (PageCtrl)page;
pageCtrl.init(
new PageConfig() {
public String getId() {return _id;}
public String getUuid() {return null;}
public String getTitle() {return _title;}
public String getStyle() {return _style;}
public String getViewport() {return _viewport;}
public String getBeforeHeadTags() {
return evalHeaders ?
PageDefinition.this.getBeforeHeadTags(page): "";
}
public String getAfterHeadTags() {
return evalHeaders ?
PageDefinition.this.getAfterHeadTags(page): "";
}
public Collection getResponseHeaders() {
if (evalHeaders)
return PageDefinition.this.getResponseHeaders(page);
return Collections.emptyList();
}
});
String s = getRootAttributes(page);
if (s != null) pageCtrl.setRootAttributes(s);
s = getContentType(page);
if (s != null) pageCtrl.setContentType(s);
s = getDocType(page);
if (s != null) pageCtrl.setDocType(s);
s = getFirstLine(page);
if (s != null) pageCtrl.setFirstLine(s);
s = getWidgetClass(page);
if (s != null) pageCtrl.setWidgetClass(s);
if (_cacheable != null) pageCtrl.setCacheable(_cacheable);
if (_autoTimeout != null) pageCtrl.setAutomaticTimeout(_autoTimeout);
if (_expfcls != null) page.setExpressionFactoryClass(_expfcls);
page.setComplete(_complete);
}
//NodeInfo//
/** Returns the parent (always null).
*/
public NodeInfo getParent() {
return null;
}
/** Returns the page definition (always this).
*/
public PageDefinition getPageDefinition() {
return this;
}
public void appendChild(NodeInfo child) {
NodeInfo oldp = child.getParent();
if (oldp != null)
oldp.removeChild(child);
_children.add(child);
((LeafInfo)child).setParentDirectly(this); //except root, all are LeafInfo
BranchInfo.fixEvaluatorRefDown(child, getEvaluatorRef());
//Use getEvaluatorRef() to force _evalr being assigned
}
public boolean removeChild(NodeInfo child) {
if (child != null && _children.remove(child)) {
((LeafInfo)child).setParentDirectly(null); //except root, all are LeafInfo
BranchInfo.fixEvaluatorRefDown(child, null);
return true;
}
return false;
}
public List getChildren() {
return _children;
}
//Object//
public String toString() {
return "[PageDefinition: "
+(_id != null ? _id: _title != null ? _title: ""+System.identityHashCode(this))
+", path="+_path+']';
}
}