| 1 | /******************************************************************************* |
| 2 | * Copyright (c) 2009 IBM Corporation and others. |
| 3 | * All rights reserved. This program and the accompanying materials |
| 4 | * are made available under the terms of the Eclipse Public License v1.0 |
| 5 | * which accompanies this distribution, and is available at |
| 6 | * http://www.eclipse.org/legal/epl-v10.html |
| 7 | * |
| 8 | * Contributors: |
| 9 | * IBM Corporation - initial API and implementation |
| 10 | *******************************************************************************/ |
| 11 | package org.eclipse.pde.api.tools.internal; |
| 12 | |
| 13 | import java.util.HashSet; |
| 14 | import java.util.Set; |
| 15 | import java.util.Stack; |
| 16 | |
| 17 | import org.eclipse.core.runtime.CoreException; |
| 18 | import org.eclipse.pde.api.tools.internal.provisional.ApiDescriptionVisitor; |
| 19 | import org.eclipse.pde.api.tools.internal.provisional.IApiAnnotations; |
| 20 | import org.eclipse.pde.api.tools.internal.provisional.descriptors.IElementDescriptor; |
| 21 | import org.eclipse.pde.api.tools.internal.provisional.descriptors.IFieldDescriptor; |
| 22 | import org.eclipse.pde.api.tools.internal.provisional.descriptors.IMethodDescriptor; |
| 23 | import org.eclipse.pde.api.tools.internal.provisional.descriptors.IPackageDescriptor; |
| 24 | import org.eclipse.pde.api.tools.internal.provisional.descriptors.IReferenceTypeDescriptor; |
| 25 | import org.eclipse.pde.api.tools.internal.provisional.model.IApiComponent; |
| 26 | import org.eclipse.pde.api.tools.internal.util.Signatures; |
| 27 | import org.eclipse.pde.api.tools.internal.util.Util; |
| 28 | import org.w3c.dom.Document; |
| 29 | import org.w3c.dom.Element; |
| 30 | |
| 31 | /** |
| 32 | * {@link IApiDescription} visitor that generates XML for the given {@link IApiComponent}. |
| 33 | * |
| 34 | * @since 1.0.0 |
| 35 | */ |
| 36 | public class ApiDescriptionXmlCreator extends ApiDescriptionVisitor { |
| 37 | |
| 38 | /** |
| 39 | * Component element |
| 40 | */ |
| 41 | private Element fComponent; |
| 42 | |
| 43 | /** |
| 44 | * XML doc being generated |
| 45 | */ |
| 46 | private Document fDoc; |
| 47 | |
| 48 | /** |
| 49 | * Current package node being created |
| 50 | */ |
| 51 | private Element fPackage; |
| 52 | |
| 53 | /** |
| 54 | * Visibility modifiers for package being visited |
| 55 | */ |
| 56 | private int fPackageVisibility; |
| 57 | |
| 58 | /** |
| 59 | * The stack of current type node being visited |
| 60 | */ |
| 61 | private Stack fTypeStack; |
| 62 | |
| 63 | /** |
| 64 | * Set of package names already visited (to avoid re-visiting same package) |
| 65 | */ |
| 66 | private Set fVisitedPackages; |
| 67 | |
| 68 | /** |
| 69 | * Constructs a new visitor for the given component. |
| 70 | * |
| 71 | * @param component API component |
| 72 | * @throws CoreException if unable to construct the visitor |
| 73 | */ |
| 74 | public ApiDescriptionXmlCreator(IApiComponent component) throws CoreException { |
| 75 | this(component.getName(), component.getId()); |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Constructs a new visitor for the given component. |
| 80 | * |
| 81 | * @param componentName the given component name |
| 82 | * @param componentId the given component id |
| 83 | * |
| 84 | * @throws CoreException if unable to construct the visitor |
| 85 | */ |
| 86 | public ApiDescriptionXmlCreator(String componentName, String componentId) throws CoreException { |
| 87 | fDoc = Util.newDocument(); |
| 88 | fComponent = fDoc.createElement(IApiXmlConstants.ELEMENT_COMPONENT); |
| 89 | fComponent.setAttribute(IApiXmlConstants.ATTR_NAME, componentName); |
| 90 | fComponent.setAttribute(IApiXmlConstants.ATTR_VERSION, IApiXmlConstants.API_DESCRIPTION_CURRENT_VERSION); |
| 91 | fDoc.appendChild(fComponent); |
| 92 | Element plugin = fDoc.createElement(IApiXmlConstants.ELEMENT_PLUGIN); |
| 93 | plugin.setAttribute(IApiXmlConstants.ATTR_ID, componentId); |
| 94 | fComponent.appendChild(plugin); |
| 95 | fVisitedPackages = new HashSet(); |
| 96 | fTypeStack = new Stack(); |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Annotates the attribute set of the specified {@link Element} |
| 101 | * |
| 102 | * @param componentContext component context to which the API applies, or <code>null</code> |
| 103 | * @param description the description to annotate from |
| 104 | * @param element the element to annotate |
| 105 | */ |
| 106 | private void annotateElementAttributes(IApiAnnotations description, Element element) { |
| 107 | element.setAttribute(IApiXmlConstants.ATTR_RESTRICTIONS, Integer.toString(description.getRestrictions())); |
| 108 | int visibility = description.getVisibility(); |
| 109 | if (visibility != fPackageVisibility) { |
| 110 | element.setAttribute(IApiXmlConstants.ATTR_VISIBILITY, Integer.toString(visibility)); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | /* (non-Javadoc) |
| 115 | * @see org.eclipse.pde.api.tools.internal.provisional.ApiDescriptionVisitor#endVisitElement(org.eclipse.pde.api.tools.internal.provisional.descriptors.IElementDescriptor, org.eclipse.pde.api.tools.internal.provisional.IApiAnnotations) |
| 116 | */ |
| 117 | public void endVisitElement(IElementDescriptor element, IApiAnnotations description) { |
| 118 | switch(element.getElementType()) { |
| 119 | case IElementDescriptor.PACKAGE: { |
| 120 | // A null package indicates there was an override for the package in a different context. |
| 121 | // Package rules are stored in the manifest, not the API description file. |
| 122 | // No need to add empty packages. |
| 123 | if (fPackage != null && fPackage.hasChildNodes()) { |
| 124 | fComponent.appendChild(fPackage); |
| 125 | } |
| 126 | fPackage = null; |
| 127 | break; |
| 128 | } |
| 129 | case IElementDescriptor.TYPE: { |
| 130 | fTypeStack.pop(); |
| 131 | break; |
| 132 | } |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * Returns the settings as a UTF-8 string containing XML. |
| 138 | * |
| 139 | * @return XML |
| 140 | * @throws CoreException if something goes wrong |
| 141 | */ |
| 142 | public String getXML() throws CoreException { |
| 143 | return Util.serializeDocument(fDoc); |
| 144 | } |
| 145 | |
| 146 | /* (non-Javadoc) |
| 147 | * @see org.eclipse.pde.api.tools.model.component.ApiDescriptionVisitor#visitElement(org.eclipse.pde.api.tools.model.component.IElementDescriptor, java.lang.String, org.eclipse.pde.api.tools.model.IApiAnnotations) |
| 148 | */ |
| 149 | public boolean visitElement(IElementDescriptor element, IApiAnnotations description) { |
| 150 | switch(element.getElementType()) { |
| 151 | case IElementDescriptor.PACKAGE: { |
| 152 | IPackageDescriptor pkg = (IPackageDescriptor) element; |
| 153 | String pkgName = pkg.getName(); |
| 154 | if (fVisitedPackages.add(pkgName)) { |
| 155 | fPackage = fDoc.createElement(IApiXmlConstants.ELEMENT_PACKAGE); |
| 156 | fPackage.setAttribute(IApiXmlConstants.ATTR_NAME, pkgName); |
| 157 | // package visibility settings are stored in MANIFEST.MF, so omit them here. |
| 158 | // still keep track of the visibility to know if children should override |
| 159 | fPackageVisibility = description.getVisibility(); |
| 160 | fPackage.setAttribute(IApiXmlConstants.ATTR_VISIBILITY, Integer.toString(fPackageVisibility)); |
| 161 | fVisitedPackages.add(pkgName); |
| 162 | } |
| 163 | break; |
| 164 | } |
| 165 | case IElementDescriptor.TYPE: { |
| 166 | IReferenceTypeDescriptor typeDesc = (IReferenceTypeDescriptor) element; |
| 167 | fTypeStack.push(fDoc.createElement(IApiXmlConstants.ELEMENT_TYPE)); |
| 168 | Element type = (Element) fTypeStack.peek(); |
| 169 | annotateElementAttributes(description, type); |
| 170 | fPackage.appendChild(type); |
| 171 | type.setAttribute(IApiXmlConstants.ATTR_NAME, Signatures.getSimpleTypeName(typeDesc.getQualifiedName())); |
| 172 | break; |
| 173 | } |
| 174 | case IElementDescriptor.METHOD: { |
| 175 | IMethodDescriptor desc = (IMethodDescriptor) element; |
| 176 | Element method = fDoc.createElement(IApiXmlConstants.ELEMENT_METHOD); |
| 177 | Element type = (Element) fTypeStack.peek(); |
| 178 | //add standard attributes |
| 179 | annotateElementAttributes(description, method); |
| 180 | if (method.hasAttributes()) { |
| 181 | type.appendChild(method); |
| 182 | //add specific method attributes |
| 183 | method.setAttribute(IApiXmlConstants.ATTR_SIGNATURE, desc.getSignature()); |
| 184 | method.setAttribute(IApiXmlConstants.ATTR_NAME, desc.getName()); |
| 185 | } |
| 186 | break; |
| 187 | } |
| 188 | case IElementDescriptor.FIELD: { |
| 189 | IFieldDescriptor desc = (IFieldDescriptor) element; |
| 190 | Element field = fDoc.createElement(IApiXmlConstants.ELEMENT_FIELD); |
| 191 | Element type = (Element) fTypeStack.peek(); |
| 192 | annotateElementAttributes(description, field); |
| 193 | if (field.hasAttributes()) { |
| 194 | type.appendChild(field); |
| 195 | //add standard attributes |
| 196 | //add specific field attributes |
| 197 | field.setAttribute(IApiXmlConstants.ATTR_NAME, desc.getName()); |
| 198 | } |
| 199 | break; |
| 200 | } |
| 201 | } |
| 202 | return true; |
| 203 | } |
| 204 | } |