| /* |
| * Copyright 2000-2009 JetBrains s.r.o. |
| * |
| * 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.jetbrains.idea.maven.dom; |
| |
| import com.intellij.javaee.ExternalResourceManager; |
| import com.intellij.openapi.components.ServiceManager; |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.vfs.VfsUtil; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.PsiManager; |
| import com.intellij.psi.util.CachedValue; |
| import com.intellij.psi.util.CachedValueProvider; |
| import com.intellij.psi.util.CachedValuesManager; |
| import com.intellij.psi.util.PsiModificationTracker; |
| import com.intellij.psi.xml.XmlFile; |
| import com.intellij.psi.xml.XmlTag; |
| import com.intellij.xml.XmlElementDescriptor; |
| import com.intellij.xml.impl.schema.XmlNSDescriptorImpl; |
| import gnu.trove.THashMap; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.Map; |
| |
| public class MavenDomElementDescriptorHolder { |
| private static final Logger LOG = Logger.getInstance(MavenDomElementDescriptorHolder.class); |
| |
| private enum FileKind { |
| PROJECT_FILE { |
| public String getSchemaUrl() { |
| return MavenSchemaProvider.MAVEN_PROJECT_SCHEMA_URL; |
| } |
| }, |
| PROFILES_FILE { |
| public String getSchemaUrl() { |
| return MavenSchemaProvider.MAVEN_PROFILES_SCHEMA_URL; |
| } |
| }, |
| SETTINGS_FILE { |
| public String getSchemaUrl() { |
| return MavenSchemaProvider.MAVEN_SETTINGS_SCHEMA_URL; |
| } |
| }; |
| |
| public abstract String getSchemaUrl(); |
| } |
| |
| private final Project myProject; |
| private final Map<FileKind, CachedValue<XmlNSDescriptorImpl>> myDescriptorsMap = |
| new THashMap<FileKind, CachedValue<XmlNSDescriptorImpl>>(); |
| |
| public MavenDomElementDescriptorHolder(Project project) { |
| myProject = project; |
| } |
| |
| public static MavenDomElementDescriptorHolder getInstance(@NotNull Project project) { |
| return ServiceManager.getService(project, MavenDomElementDescriptorHolder.class); |
| } |
| |
| @Nullable |
| public XmlElementDescriptor getDescriptor(@NotNull XmlTag tag) { |
| FileKind kind = getFileKind(tag.getContainingFile()); |
| if (kind == null) return null; |
| |
| XmlNSDescriptorImpl desc; |
| synchronized (this) { |
| desc = tryGetOrCreateDescriptor(kind); |
| if (desc == null) return null; |
| } |
| LOG.assertTrue(tag.isValid()); |
| LOG.assertTrue(desc.isValid()); |
| return desc.getElementDescriptor(tag.getName(), desc.getDefaultNamespace()); |
| } |
| |
| @Nullable |
| private XmlNSDescriptorImpl tryGetOrCreateDescriptor(final FileKind kind) { |
| CachedValue<XmlNSDescriptorImpl> result = myDescriptorsMap.get(kind); |
| if (result == null) { |
| result = CachedValuesManager.getManager(myProject).createCachedValue(new CachedValueProvider<XmlNSDescriptorImpl>() { |
| @Override |
| public Result<XmlNSDescriptorImpl> compute() { |
| return Result.create(doCreateDescriptor(kind), PsiModificationTracker.OUT_OF_CODE_BLOCK_MODIFICATION_COUNT); |
| } |
| }, false); |
| myDescriptorsMap.put(kind, result); |
| } |
| return result.getValue(); |
| } |
| |
| @Nullable |
| private XmlNSDescriptorImpl doCreateDescriptor(FileKind kind) { |
| String schemaUrl = kind.getSchemaUrl(); |
| String location = ExternalResourceManager.getInstance().getResourceLocation(schemaUrl); |
| if (schemaUrl.equals(location)) return null; |
| |
| VirtualFile schema; |
| try { |
| schema = VfsUtil.findFileByURL(new URL(location)); |
| } |
| catch (MalformedURLException ignore) { |
| return null; |
| } |
| |
| if (schema == null) return null; |
| |
| PsiFile psiFile = PsiManager.getInstance(myProject).findFile(schema); |
| if (!(psiFile instanceof XmlFile)) return null; |
| |
| XmlNSDescriptorImpl result = new XmlNSDescriptorImpl(); |
| result.init(psiFile); |
| return result; |
| } |
| |
| @Nullable |
| private static FileKind getFileKind(PsiFile file) { |
| if (MavenDomUtil.isProjectFile(file)) return FileKind.PROJECT_FILE; |
| if (MavenDomUtil.isProfilesFile(file)) return FileKind.PROFILES_FILE; |
| if (MavenDomUtil.isSettingsFile(file)) return FileKind.SETTINGS_FILE; |
| return null; |
| } |
| } |