| /******************************************************************************* |
| * Copyright (c) 2008, 2018 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.pde.api.tools.internal.builder; |
| |
| import java.text.MessageFormat; |
| import java.util.Set; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.jdt.core.Flags; |
| import org.eclipse.jdt.core.IType; |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.Position; |
| import org.eclipse.pde.api.tools.internal.provisional.ApiPlugin; |
| import org.eclipse.pde.api.tools.internal.provisional.IApiAnnotations; |
| import org.eclipse.pde.api.tools.internal.provisional.IApiDescription; |
| import org.eclipse.pde.api.tools.internal.provisional.RestrictionModifiers; |
| import org.eclipse.pde.api.tools.internal.provisional.VisibilityModifiers; |
| import org.eclipse.pde.api.tools.internal.provisional.builder.IReference; |
| import org.eclipse.pde.api.tools.internal.provisional.descriptors.IElementDescriptor; |
| import org.eclipse.pde.api.tools.internal.provisional.model.IApiComponent; |
| import org.eclipse.pde.api.tools.internal.provisional.model.IApiMember; |
| import org.eclipse.pde.api.tools.internal.provisional.model.IApiMethod; |
| import org.eclipse.pde.api.tools.internal.provisional.model.IApiType; |
| import org.eclipse.pde.api.tools.internal.provisional.problems.IApiProblem; |
| import org.eclipse.pde.api.tools.internal.provisional.problems.IApiProblemTypes; |
| import org.eclipse.pde.api.tools.internal.util.Signatures; |
| |
| /** |
| * Detects leaks in method return types and parameters |
| * |
| * @since 1.1 |
| * @noextend This class is not intended to be sub-classed by clients. |
| */ |
| public abstract class MethodLeakDetector extends AbstractLeakProblemDetector { |
| |
| /** |
| * @param nonApiPackageNames |
| */ |
| public MethodLeakDetector(Set<String> nonApiPackageNames) { |
| super(nonApiPackageNames); |
| } |
| |
| @Override |
| protected int getElementType(IReference reference) { |
| return IElementDescriptor.METHOD; |
| } |
| |
| @Override |
| protected int getProblemKind() { |
| return IApiProblem.API_LEAK; |
| } |
| |
| @Override |
| protected String getSeverityKey() { |
| return IApiProblemTypes.LEAK_METHOD_RETURN_TYPE; |
| } |
| |
| @Override |
| protected boolean isProblem(IReference reference, IProgressMonitor monitor) { |
| IApiMethod method = (IApiMethod) reference.getMember(); |
| IApiType type = (IApiType) reference.getResolvedReference(); |
| try { |
| // referenced type is non-API |
| IApiAnnotations annotations = type.getApiComponent().getApiDescription().resolveAnnotations(type.getHandle()); |
| if (annotations != null) { |
| if (VisibilityModifiers.isPrivate(annotations.getVisibility())) { |
| if ((Flags.AccProtected & method.getModifiers()) > 0) { |
| // ignore protected members if contained in a @noextend |
| // type |
| // TODO: we could perform this check before resolution - |
| // it's on the source location |
| IApiDescription description = method.getApiComponent().getApiDescription(); |
| annotations = description.resolveAnnotations(method.getHandle().getEnclosingType()); |
| if (annotations == null || RestrictionModifiers.isExtendRestriction(annotations.getRestrictions())) { |
| // ignore |
| return false; |
| } |
| } |
| return true; |
| } |
| } else { |
| // could be a reference to a top level secondary/non-public type |
| if (isEnclosingTypeVisible(type)) { |
| // this is an unexpected condition - the enclosing type is |
| // visible, but it has no annotations - log an error |
| String typeName = type.getName(); |
| if (typeName != null) { |
| if (!typeName.startsWith("javax.")) { //$NON-NLS-1$ |
| ApiPlugin.log(Status.info(MessageFormat.format(BuilderMessages.AbstractTypeLeakDetector_vis_type_has_no_api_description, typeName))); |
| } |
| } |
| } else { |
| // enclosing type is not visible - this is a problem |
| return true; |
| } |
| } |
| } catch (CoreException e) { |
| ApiPlugin.log(e); |
| checkIfDisposed(method.getApiComponent(), monitor); |
| } |
| return false; |
| } |
| |
| @Override |
| protected String[] getMessageArgs(IReference reference) throws CoreException { |
| IApiMethod method = (IApiMethod) reference.getMember(); |
| IApiType type = (IApiType) reference.getResolvedReference(); |
| return new String[] { |
| getSimpleTypeName(type), getSimpleTypeName(method), |
| Signatures.getMethodSignature(method) }; |
| } |
| |
| @Override |
| protected String[] getQualifiedMessageArgs(IReference reference) throws CoreException { |
| IApiMethod method = (IApiMethod) reference.getMember(); |
| IApiType type = (IApiType) reference.getResolvedReference(); |
| return new String[] { |
| getQualifiedTypeName(type), getQualifiedTypeName(method), |
| Signatures.getMethodSignature(method) }; |
| } |
| |
| @Override |
| protected Position getSourceRange(IType type, IDocument doc, IReference reference) throws CoreException, BadLocationException { |
| return getSourceRangeForMethod(type, reference, (IApiMethod) reference.getMember()); |
| } |
| |
| @Override |
| public boolean considerReference(IReference reference, IProgressMonitor monitor) { |
| if (super.considerReference(reference, monitor) && isNonAPIReference(reference)) { |
| IApiMember member = reference.getMember(); |
| if (member != null && matchesSourceModifiers(member) && matchesSourceApiRestrictions(member)) { |
| retainReference(reference); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Returns if the source API restrictions for the given member matches the |
| * restrictions in the parent API description |
| * |
| * @param member |
| * @return true if it matches, false otherwise |
| */ |
| protected boolean matchesSourceApiRestrictions(IApiMember member) { |
| IApiComponent apiComponent = member.getApiComponent(); |
| try { |
| IApiMethod method = (IApiMethod) member; |
| IApiAnnotations annotations = apiComponent.getApiDescription().resolveAnnotations(method.getHandle()); |
| if (annotations != null) { |
| if (VisibilityModifiers.isAPI(annotations.getVisibility())) { |
| int ares = annotations.getRestrictions(); |
| if (ares != 0) { |
| if (method.isConstructor()) { |
| return (ares & RestrictionModifiers.NO_REFERENCE) == 0; |
| } |
| if ((ares & RestrictionModifiers.NO_OVERRIDE) == 0) { |
| IApiAnnotations annot = apiComponent.getApiDescription().resolveAnnotations(method.getEnclosingType().getHandle()); |
| int pres = 0; |
| if (annot != null) { |
| pres = annot.getRestrictions(); |
| } |
| return (ares & RestrictionModifiers.NO_REFERENCE) != 0 && (!Flags.isFinal(method.getModifiers()) && !Flags.isStatic(method.getModifiers()) && !Flags.isFinal(method.getEnclosingType().getModifiers()) && ((pres & RestrictionModifiers.NO_EXTEND) == 0)); |
| } |
| return (ares & RestrictionModifiers.NO_REFERENCE) == 0; |
| } else { |
| return !(Flags.isProtected(method.getModifiers()) && Flags.isFinal(method.getEnclosingType().getModifiers())); |
| } |
| } |
| } else { |
| return true; |
| } |
| } catch (CoreException e) { |
| ApiPlugin.log(e); |
| } |
| return false; |
| } |
| |
| /** |
| * Returns if the source modifiers for the given member match the ones |
| * specified in the detector |
| * |
| * @param member |
| * @return true if the modifiers match, false otherwise |
| */ |
| protected boolean matchesSourceModifiers(IApiMember member) { |
| IApiMember lmember = member; |
| while (lmember != null) { |
| int modifiers = lmember.getModifiers(); |
| if (Flags.isPublic(modifiers) || Flags.isProtected(modifiers)) { |
| try { |
| lmember = lmember.getEnclosingType(); |
| } catch (CoreException e) { |
| ApiPlugin.log(e.getStatus()); |
| return false; |
| } |
| } else { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| } |