| // Copyright 2004 The Apache Software Foundation |
| // |
| // 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 org.apache.tapestry.spec; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.commons.lang.builder.ToStringBuilder; |
| import org.apache.tapestry.ApplicationRuntimeException; |
| import org.apache.tapestry.ILocation; |
| import org.apache.tapestry.IResourceLocation; |
| import org.apache.tapestry.IResourceResolver; |
| import org.apache.tapestry.Tapestry; |
| |
| /** |
| * Specification for a library. {@link org.apache.tapestry.spec.ApplicationSpecification} |
| * is a specialized kind of library. |
| * |
| * @author Howard Lewis Ship |
| * @version $Id$ |
| * @since 2.2 |
| * |
| **/ |
| |
| public class LibrarySpecification extends LocatablePropertyHolder implements ILibrarySpecification |
| { |
| /** |
| * Resource resolver (used to instantiate extensions). |
| * |
| **/ |
| |
| private IResourceResolver _resolver; |
| |
| /** |
| * Map of page name to page specification path. |
| * |
| **/ |
| |
| private Map _pages; |
| |
| /** |
| * Map of component alias to component specification path. |
| * |
| **/ |
| private Map _components; |
| |
| /** |
| * Map of service name to service class name. |
| * |
| **/ |
| |
| private Map _services; |
| |
| /** |
| * Map of library id to library specification path. |
| * |
| **/ |
| |
| private Map _libraries; |
| |
| private String _description; |
| |
| /** |
| * Map of extension name to {@link IExtensionSpecification}. |
| * |
| **/ |
| |
| private Map _extensions; |
| |
| /** |
| * Map of extension name to Object for instantiated extensions. |
| * |
| **/ |
| |
| private Map _instantiatedExtensions; |
| |
| /** |
| * The XML Public Id used when the library specification was read |
| * (if applicable). |
| * |
| * @since 2.2 |
| * |
| **/ |
| |
| private String _publicId; |
| |
| /** |
| * The location of the specification. |
| * |
| **/ |
| |
| private IResourceLocation _specificationLocation; |
| |
| public String getLibrarySpecificationPath(String id) |
| { |
| return (String) get(_libraries, id); |
| } |
| |
| /** |
| * Sets the specification path for an embedded library. |
| * |
| * @throws IllegalArgumentException if a library with the given |
| * id already exists |
| * |
| **/ |
| |
| public void setLibrarySpecificationPath(String id, String path) |
| { |
| if (_libraries == null) |
| _libraries = new HashMap(); |
| |
| if (_libraries.containsKey(id)) |
| throw new IllegalArgumentException( |
| Tapestry.format("LibrarySpecification.duplicate-child-namespace-id", id)); |
| |
| _libraries.put(id, path); |
| } |
| |
| public List getLibraryIds() |
| { |
| return sortedKeys(_libraries); |
| } |
| |
| public String getPageSpecificationPath(String name) |
| { |
| return (String) get(_pages, name); |
| } |
| |
| public void setPageSpecificationPath(String name, String path) |
| { |
| if (_pages == null) |
| _pages = new HashMap(); |
| |
| if (_pages.containsKey(name)) |
| throw new IllegalArgumentException( |
| Tapestry.format("LibrarySpecification.duplicate-page-name", name)); |
| |
| _pages.put(name, path); |
| } |
| |
| public List getPageNames() |
| { |
| return sortedKeys(_pages); |
| } |
| |
| public void setComponentSpecificationPath(String alias, String path) |
| { |
| if (_components == null) |
| _components = new HashMap(); |
| |
| if (_components.containsKey(alias)) |
| throw new IllegalArgumentException( |
| Tapestry.format("LibrarySpecification.duplicate-component-alias", alias)); |
| |
| _components.put(alias, path); |
| } |
| |
| public String getComponentSpecificationPath(String alias) |
| { |
| return (String) get(_components, alias); |
| } |
| |
| /** |
| * @since 3.0 |
| * |
| **/ |
| |
| public List getComponentTypes() |
| { |
| return sortedKeys(_components); |
| } |
| |
| public String getServiceClassName(String name) |
| { |
| return (String) get(_services, name); |
| } |
| |
| public List getServiceNames() |
| { |
| return sortedKeys(_services); |
| } |
| |
| public void setServiceClassName(String name, String className) |
| { |
| if (_services == null) |
| _services = new HashMap(); |
| |
| if (_services.containsKey(name)) |
| throw new IllegalArgumentException( |
| Tapestry.format("LibrarySpecification.duplicate-service-name", name)); |
| |
| _services.put(name, className); |
| } |
| |
| private List sortedKeys(Map map) |
| { |
| if (map == null) |
| return Collections.EMPTY_LIST; |
| |
| List result = new ArrayList(map.keySet()); |
| |
| Collections.sort(result); |
| |
| return result; |
| } |
| |
| private Object get(Map map, Object key) |
| { |
| if (map == null) |
| return null; |
| |
| return map.get(key); |
| } |
| |
| /** |
| * |
| * Returns the documentation for this library.. |
| * |
| * |
| **/ |
| |
| public String getDescription() |
| { |
| return _description; |
| } |
| |
| /** |
| * |
| * Sets the documentation for this library. |
| * |
| * |
| **/ |
| |
| public void setDescription(String description) |
| { |
| _description = description; |
| } |
| |
| /** |
| * Returns a Map of extensions; key is extension name, value is |
| * {@link org.apache.tapestry.spec.IExtensionSpecification}. |
| * May return null. The returned Map is immutable. |
| * |
| **/ |
| |
| public Map getExtensionSpecifications() |
| { |
| if (_extensions == null) |
| return null; |
| |
| return Collections.unmodifiableMap(_extensions); |
| } |
| |
| /** |
| * Adds another extension specification. |
| * |
| * @throws IllegalArgumentException if an extension with the given name already exists. |
| * |
| **/ |
| |
| public void addExtensionSpecification(String name, IExtensionSpecification extension) |
| { |
| if (_extensions == null) |
| _extensions = new HashMap(); |
| |
| if (_extensions.containsKey(name)) |
| throw new IllegalArgumentException( |
| Tapestry.format("LibrarySpecification.duplicate-extension-name", this, name)); |
| |
| _extensions.put(name, extension); |
| } |
| |
| /** |
| * Returns a sorted List of the names of all extensions. May return the empty list, |
| * but won't return null. |
| * |
| **/ |
| |
| public synchronized List getExtensionNames() |
| { |
| return sortedKeys(_instantiatedExtensions); |
| } |
| |
| /** |
| * Returns the named IExtensionSpecification, or null if it doesn't exist. |
| * |
| **/ |
| |
| public IExtensionSpecification getExtensionSpecification(String name) |
| { |
| if (_extensions == null) |
| return null; |
| |
| return (IExtensionSpecification) _extensions.get(name); |
| } |
| |
| /** |
| * Returns true if this library specification has a specification |
| * for the named extension. |
| * |
| **/ |
| |
| public boolean checkExtension(String name) |
| { |
| if (_extensions == null) |
| return false; |
| |
| return _extensions.containsKey(name); |
| } |
| |
| /** |
| * Returns an instantiated extension. Extensions are created as needed and |
| * cached for later use. |
| * |
| * @throws IllegalArgumentException if no extension specification exists for the |
| * given name. |
| * |
| **/ |
| |
| public synchronized Object getExtension(String name) |
| { |
| return getExtension(name, null); |
| } |
| |
| /** @since 3.0 **/ |
| |
| public synchronized Object getExtension(String name, Class typeConstraint) |
| { |
| if (_instantiatedExtensions == null) |
| _instantiatedExtensions = new HashMap(); |
| |
| Object result = _instantiatedExtensions.get(name); |
| IExtensionSpecification spec = getExtensionSpecification(name); |
| |
| if (spec == null) |
| throw new IllegalArgumentException( |
| Tapestry.format("LibrarySpecification.no-such-extension", name)); |
| |
| if (result == null) |
| { |
| |
| result = spec.instantiateExtension(_resolver); |
| |
| _instantiatedExtensions.put(name, result); |
| } |
| |
| if (typeConstraint != null) |
| applyTypeConstraint(name, result, typeConstraint, spec.getLocation()); |
| |
| return result; |
| } |
| |
| /** |
| * Checks that an extension conforms to the supplied type constraint. |
| * |
| * @throws IllegalArgumentException if the extension fails the check. |
| * |
| * @since 3.0 |
| * |
| **/ |
| |
| protected void applyTypeConstraint( |
| String name, |
| Object extension, |
| Class typeConstraint, |
| ILocation location) |
| { |
| Class extensionClass = extension.getClass(); |
| |
| // Can you assign an instance of the extension to a variable |
| // of type typeContraint legally? |
| |
| if (typeConstraint.isAssignableFrom(extensionClass)) |
| return; |
| |
| String key = |
| typeConstraint.isInterface() |
| ? "LibrarySpecification.extension-does-not-implement-interface" |
| : "LibrarySpecification.extension-not-a-subclass"; |
| |
| throw new ApplicationRuntimeException( |
| Tapestry.format(key, name, extensionClass.getName(), typeConstraint.getName()), |
| location, |
| null); |
| } |
| |
| /** |
| * Invoked after the entire specification has been constructed |
| * to instantiate any extensions marked immediate. |
| * |
| **/ |
| |
| public synchronized void instantiateImmediateExtensions() |
| { |
| if (_extensions == null) |
| return; |
| |
| Iterator i = _extensions.entrySet().iterator(); |
| |
| while (i.hasNext()) |
| { |
| Map.Entry entry = (Map.Entry) i.next(); |
| |
| IExtensionSpecification spec = (IExtensionSpecification) entry.getValue(); |
| |
| if (!spec.isImmediate()) |
| continue; |
| |
| String name = (String) entry.getKey(); |
| |
| getExtension(name); |
| } |
| |
| } |
| |
| public IResourceResolver getResourceResolver() |
| { |
| return _resolver; |
| } |
| |
| public void setResourceResolver(IResourceResolver resolver) |
| { |
| _resolver = resolver; |
| } |
| |
| /** |
| * Returns the extensions map. |
| * @return Map of objects. |
| * |
| **/ |
| |
| protected Map getExtensions() |
| { |
| return _extensions; |
| } |
| |
| /** |
| * Updates the extension map. |
| * @param extension A Map of extension specification paths |
| * keyed on extension id. |
| * |
| * <p>The map is retained, not copied. |
| * |
| **/ |
| |
| protected void setExtensions(Map extension) |
| { |
| _extensions = extension; |
| } |
| |
| /** |
| * Returns the libraries map. |
| * @return Map of {@link LibrarySpecification}. |
| * |
| **/ |
| |
| protected Map getLibraries() |
| { |
| return _libraries; |
| } |
| |
| /** |
| * Updates the library map. |
| * @param libraries A Map of library specification paths |
| * keyed on library id. |
| * |
| * <p>The map is retained, not copied. |
| * |
| **/ |
| |
| protected void setLibraries(Map libraries) |
| { |
| _libraries = libraries; |
| } |
| |
| /** |
| * Returns the pages map. |
| * @return Map of {@link IComponentSpecification}. |
| * |
| **/ |
| |
| protected Map getPages() |
| { |
| return _pages; |
| } |
| |
| /** |
| * Updates the page map. |
| * @param pages A Map of page specification paths |
| * keyed on page id. |
| * |
| * <p>The map is retained, not copied. |
| * |
| **/ |
| |
| protected void setPages(Map pages) |
| { |
| _pages = pages; |
| } |
| |
| /** |
| * Returns the services. |
| * @return Map of service class names. |
| * |
| **/ |
| |
| protected Map getServices() |
| { |
| return _services; |
| } |
| |
| /** |
| * Updates the services map. |
| * @param services A Map of the fully qualified names of classes |
| * which implement |
| * {@link org.apache.tapestry.engine.IEngineService} |
| * keyed on service id. |
| * |
| * <p>The map is retained, not copied. |
| * |
| **/ |
| |
| protected void setServices(Map services) |
| { |
| _services = services; |
| } |
| |
| /** |
| * Returns the components map. |
| * @return Map of {@link IContainedComponent}. |
| * |
| **/ |
| |
| protected Map getComponents() |
| { |
| return _components; |
| } |
| |
| /** |
| * Updates the components map. |
| * @param components A Map of {@link IContainedComponent} keyed on component id. |
| * The map is retained, not copied. |
| * |
| **/ |
| |
| protected void setComponents(Map components) |
| { |
| _components = components; |
| } |
| |
| /** |
| * Returns the XML Public Id for the library file, or null |
| * if not applicable. |
| * |
| * <p> |
| * This method exists as a convienience for the Spindle plugin. |
| * A previous method used an arbitrary version string, the |
| * public id is more useful and less ambiguous. |
| * |
| * |
| **/ |
| |
| public String getPublicId() |
| { |
| return _publicId; |
| } |
| |
| public void setPublicId(String publicId) |
| { |
| _publicId = publicId; |
| } |
| |
| /** @since 3.0 **/ |
| |
| public IResourceLocation getSpecificationLocation() |
| { |
| return _specificationLocation; |
| } |
| |
| /** @since 3.0 **/ |
| |
| public void setSpecificationLocation(IResourceLocation specificationLocation) |
| { |
| _specificationLocation = specificationLocation; |
| } |
| |
| /** @since 3.0 **/ |
| |
| public synchronized String toString() |
| { |
| ToStringBuilder builder = new ToStringBuilder(this); |
| |
| builder.append("components", _components); |
| builder.append("description", _description); |
| builder.append("instantiatedExtensions", _instantiatedExtensions); |
| builder.append("libraries", _libraries); |
| builder.append("pages", _pages); |
| builder.append("publicId", _publicId); |
| builder.append("resolver", _resolver); |
| builder.append("services", _services); |
| builder.append("specificationLocation", _specificationLocation); |
| |
| extendDescription(builder); |
| |
| return builder.toString(); |
| } |
| |
| /** |
| * Does nothing, subclasses may override to add additional |
| * description. |
| * |
| * @see #toString() |
| * @since 3.0 |
| * |
| **/ |
| |
| protected void extendDescription(ToStringBuilder builder) |
| { |
| } |
| |
| } |