| /* |
| * Copyright 2008 Google Inc. |
| * |
| * 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 com.google.gwt.resources.rg; |
| |
| import com.google.gwt.core.ext.TreeLogger; |
| import com.google.gwt.core.ext.UnableToCompleteException; |
| import com.google.gwt.core.ext.typeinfo.JMethod; |
| import com.google.gwt.resources.client.DataResource.DoNotEmbed; |
| import com.google.gwt.resources.client.DataResource.MimeType; |
| import com.google.gwt.resources.client.impl.DataResourcePrototype; |
| import com.google.gwt.resources.ext.AbstractResourceGenerator; |
| import com.google.gwt.resources.ext.ResourceContext; |
| import com.google.gwt.resources.ext.ResourceGeneratorUtil; |
| import com.google.gwt.resources.ext.SupportsGeneratorResultCaching; |
| import com.google.gwt.safehtml.shared.UriUtils; |
| import com.google.gwt.user.rebind.SourceWriter; |
| import com.google.gwt.user.rebind.StringSourceWriter; |
| |
| import java.net.URL; |
| |
| /** |
| * Provides implementations of DataResource. |
| */ |
| public final class DataResourceGenerator extends AbstractResourceGenerator implements |
| SupportsGeneratorResultCaching { |
| @Override |
| public String createAssignment(TreeLogger logger, ResourceContext context, JMethod method) |
| throws UnableToCompleteException { |
| |
| URL[] resources = ResourceGeneratorUtil.findResources(logger, context, method); |
| |
| if (resources.length != 1) { |
| logger.log(TreeLogger.ERROR, "Exactly one resource must be specified", null); |
| throw new UnableToCompleteException(); |
| } |
| |
| // Determine if a MIME Type has been specified |
| MimeType mimeTypeAnnotation = method.getAnnotation(MimeType.class); |
| String mimeType = mimeTypeAnnotation != null ? mimeTypeAnnotation.value() : null; |
| |
| // Determine if resource should not be embedded |
| DoNotEmbed doNotEmbed = method.getAnnotation(DoNotEmbed.class); |
| boolean forceExternal = (doNotEmbed != null); |
| |
| URL resource = resources[0]; |
| String outputUrlExpression = context.deploy(resource, mimeType, forceExternal); |
| |
| SourceWriter sw = new StringSourceWriter(); |
| // Convenience when examining the generated code. |
| if (!AbstractResourceGenerator.STRIP_COMMENTS) { |
| sw.println("// " + resource.toExternalForm()); |
| } |
| sw.println("new " + DataResourcePrototype.class.getName() + "("); |
| sw.indent(); |
| sw.println('"' + method.getName() + "\","); |
| sw.println(UriUtils.class.getName() + ".fromTrustedString(" + outputUrlExpression + ")"); |
| sw.outdent(); |
| sw.print(")"); |
| |
| return sw.toString(); |
| } |
| } |