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/* *************************************************************************
IT Mill Toolkit
Development of Browser User Interfaces Made Easy
Copyright (C) 2000-2006 IT Mill Ltd
*************************************************************************
This product is distributed under commercial license that can be found
from the product package on license.pdf. Use of this product might
require purchasing a commercial license from IT Mill Ltd. For guidelines
on usage, see licensing-guidelines.html
*************************************************************************
For more information, contact:
IT Mill Ltd phone: +358 2 4802 7180
Ruukinkatu 2-4 fax: +358 2 4802 7181
20540, Turku email: info@itmill.com
Finland company www: www.itmill.com
Primary source for information and releases: www.itmill.com
********************************************************************** */
package com.itmill.toolkit.terminal.web;
import java.io.InputStream;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
/**
* Theme source for consisting of collection of other theme sources. This class
* is used to implement the retrieval of themes from multiple sources. Also this
* class implements the inheritance of themes by first retrieving the relevant
* parent theme information.
*
* @author IT Mill Ltd.
* @version
* @VERSION@
* @since 3.0
*/
public class CollectionThemeSource implements ThemeSource {
private List sources = new LinkedList();
/**
* Gets the name of the ThemeSource.
* @see com.itmill.toolkit.terminal.web.ThemeSource#getName()
*/
public String getName() {
return "THEMES";
}
/**
* Gets the XSL stream for the specified theme and web-browser type.
* @see com.itmill.toolkit.terminal.web.ThemeSource#getXSLStreams(Theme,
* WebBrowser)
*/
public Collection getXSLStreams(Theme theme, WebBrowser type)
throws ThemeException {
Collection xslFiles = new LinkedList();
// Adds parent theme XSL
xslFiles.addAll(this.getParentXSLStreams(theme, type));
// Adds theme XSL, Handle subdirectories: return the first match
for (Iterator i = this.sources.iterator(); i.hasNext();) {
ThemeSource source = (ThemeSource) i.next();
if (source.getThemes().contains(theme))
xslFiles.addAll(source.getXSLStreams(theme, type));
}
return xslFiles;
}
/**
*
* @param theme
* @param type
* @return
* @throws ThemeException If the resource is not found or there was
* some problem finding the resource.
*/
private Collection getParentXSLStreams(Theme theme, WebBrowser type)
throws ThemeException {
Collection xslFiles = new LinkedList();
String parentName = theme.getParent();
if (parentName != null) {
Theme parent = this.getThemeByName(parentName);
if (parent != null) {
xslFiles.addAll(this.getXSLStreams(parent, type));
} else {
throw new ThemeSource.ThemeException(
"Parent theme not found for name: " + parentName);
}
}
return xslFiles;
}
/**
* Gets the last modification time, used to reload theme on changes.
* @see com.itmill.toolkit.terminal.web.ThemeSource#getModificationTime()
*/
public long getModificationTime() {
long modTime = 0;
for (Iterator i = this.sources.iterator(); i.hasNext();) {
long t = ((ThemeSource) i.next()).getModificationTime();
if (t > modTime)
modTime = t;
}
return modTime;
}
/**
* Gets the input stream for the resource with the specified resource id.
* @see com.itmill.toolkit.terminal.web.ThemeSource#getResource(String)
*/
public InputStream getResource(String resourceId) throws ThemeException {
// Resolves theme name and resource name
int delim = resourceId.indexOf("/");
String subResourceId = "";
String themeName = "";
if (delim >= 0 && delim < resourceId.length() - 1) {
subResourceId = resourceId.substring(delim + 1);
themeName = resourceId.substring(0, delim);
}
// Gets the list of themes to look for the resource
List themes = new LinkedList();
while (themeName != null && themeName.length() > 0) {
Theme t = this.getThemeByName(themeName);
if (t != null)
themes.add(themeName);
themeName = t.getParent();
}
// Iterate all themes in list
for (Iterator ti = themes.iterator(); ti.hasNext();) {
String name = (String) ti.next();
String resource = name + "/" + subResourceId;
// Search all sources
for (Iterator i = this.sources.iterator(); i.hasNext();) {
try {
InputStream in = ((ThemeSource) i.next())
.getResource(resource);
if (in != null)
return in;
} catch (ThemeException e) {
// Ignore and continue to next source
}
}
}
throw new ThemeException("Theme resource not found:" + subResourceId
+ " in themes " + themes);
}
/**
* Gets the list of themes in the theme source.
* @see com.itmill.toolkit.terminal.web.ThemeSource#getThemes()
*/
public Collection getThemes() {
Collection themes = new LinkedList();
for (Iterator i = this.sources.iterator(); i.hasNext();) {
Collection c = ((ThemeSource) i.next()).getThemes();
themes.addAll(c);
}
return themes;
}
/**
* Gets the theme instance by name.
* @param name the theme name.
* @see com.itmill.toolkit.terminal.web.ThemeSource#getThemeByName(String)
*/
public Theme getThemeByName(String name) {
for (Iterator i = this.sources.iterator(); i.hasNext();) {
Theme t = ((ThemeSource) i.next()).getThemeByName(name);
if (t != null)
return t;
}
return null;
}
/**
* Adds new theme source to this collection.
*
* @param source
* the Theme source to be added.
*/
public void add(ThemeSource source) {
this.sources.add(source);
}
}
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