| /******************************************************************************* |
| * Copyright (c) 2000, 2009 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.core; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.jdt.core.compiler.CharOperation; |
| import org.eclipse.jdt.internal.core.BufferManager; |
| import org.eclipse.jdt.internal.core.CompilationUnit; |
| import org.eclipse.jdt.internal.core.DefaultWorkingCopyOwner; |
| import org.eclipse.jdt.internal.core.ExternalJavaProject; |
| import org.eclipse.jdt.internal.core.PackageFragment; |
| import org.eclipse.jdt.internal.core.PackageFragmentRoot; |
| |
| /** |
| * The owner of an {@link ICompilationUnit} handle in working copy mode. |
| * An owner is used to identify a working copy and to create its buffer. |
| * <p> |
| * Clients should subclass this class to instantiate a working copy owner that is specific to their need and that |
| * they can pass in to various APIs (e.g. {@link IType#resolveType(String, WorkingCopyOwner)}. |
| * Clients can also override the default implementation of {@link #createBuffer(ICompilationUnit)}. |
| * </p><p> |
| * Note: even though this class has no abstract method, which means that it provides functional default behavior, |
| * it is still an abstract class, as clients are intended to own their owner implementation. |
| * </p> |
| * @see ICompilationUnit#becomeWorkingCopy(org.eclipse.core.runtime.IProgressMonitor) |
| * @see ICompilationUnit#discardWorkingCopy() |
| * @see ICompilationUnit#getWorkingCopy(org.eclipse.core.runtime.IProgressMonitor) |
| * @since 3.0 |
| */ |
| public abstract class WorkingCopyOwner { |
| |
| /** |
| * Sets the buffer provider of the primary working copy owner. Note that even if the |
| * buffer provider is a working copy owner, only its <code>createBuffer(ICompilationUnit)</code> |
| * method is used by the primary working copy owner. It doesn't replace the internal primary |
| * working owner. |
| * <p> |
| * This method is for internal use by the jdt-related plug-ins. |
| * Clients outside of the jdt should not reference this method. |
| * </p> |
| * |
| * @param primaryBufferProvider the primary buffer provider |
| */ |
| public static void setPrimaryBufferProvider(WorkingCopyOwner primaryBufferProvider) { |
| DefaultWorkingCopyOwner.PRIMARY.primaryBufferProvider = primaryBufferProvider; |
| } |
| |
| /** |
| * Creates a buffer for the given working copy. |
| * The new buffer will be initialized with the contents of the underlying file |
| * if and only if it was not already initialized by the compilation owner (a buffer is |
| * uninitialized if its content is <code>null</code>). |
| * <p> |
| * Note: This buffer will be associated to the working copy for its entire life-cycle. Another |
| * working copy on same unit but owned by a different owner would not share the same buffer |
| * unless its owner decided to implement such a sharing behaviour. |
| * </p> |
| * |
| * @param workingCopy the working copy of the buffer |
| * @return IBuffer the created buffer for the given working copy |
| * @see IBuffer |
| */ |
| public IBuffer createBuffer(ICompilationUnit workingCopy) { |
| |
| return BufferManager.createBuffer(workingCopy); |
| } |
| |
| /** |
| * Returns the problem requestor used by a working copy of this working copy owner. |
| * <p> |
| * By default, no problem requestor is configured. Clients can override this |
| * method to provide a requestor. |
| * </p> |
| * |
| * @param workingCopy The problem requestor used for the given working copy. |
| * @return the problem requestor to be used by working copies of this working |
| * copy owner or <code>null</code> if no problem requestor is configured. |
| * |
| * @since 3.3 |
| */ |
| public IProblemRequestor getProblemRequestor(ICompilationUnit workingCopy) { |
| return null; |
| } |
| |
| /** |
| * Returns the source of the compilation unit that defines the given type in |
| * the given package, or <code>null</code> if the type is unknown to this |
| * owner. |
| * <p>This method is called before the normal lookup (i.e. before looking |
| * at the project's classpath and before looking at the working copies of this |
| * owner.)</p> |
| * <p>This allows to provide types that are not normally available, or to hide |
| * types that would normally be available by returning an empty source for |
| * the given type and package.</p> |
| * <p>Example of use: |
| * <pre> |
| * WorkingCopyOwner owner = new WorkingCopyOwner() { |
| * public String findSource(String typeName, String packageName) { |
| * if ("to.be".equals(packageName) && "Generated".equals(typeName)) { |
| * return |
| * "package to.be;\n" + |
| * "public class Generated {\n" + |
| * "}"; |
| * } |
| * return super.findSource(typeName, packageName); |
| * } |
| * public boolean isPackage(String[] pkg) { |
| * switch (pkg.length) { |
| * case 1: |
| * return "to".equals(pkg[0]); |
| * case 2: |
| * return "to".equals(pkg[0]) && "be".equals(pkg[1]); |
| * } |
| * return false; |
| * } |
| * }; |
| * // Working copy on X.java with the following contents: |
| * // public class X extends to.be.Generated { |
| * // } |
| * ICompilationUnit workingCopy = ... |
| * ASTParser parser = ASTParser.newParser(AST.JLS3); |
| * parser.setSource(workingCopy); |
| * parser.setResolveBindings(true); |
| * parser.setWorkingCopyOwner(owner); |
| * CompilationUnit cu = (CompilationUnit) parser.createAST(null); |
| * assert cu.getProblems().length == 0; |
| * </pre> |
| * </p> |
| * |
| * @param typeName the simple name of the type to lookup |
| * @param packageName the dot-separated name of the package of type |
| * @return the source of the compilation unit that defines the given type in |
| * the given package, or <code>null</code> if the type is unknown |
| * @see #isPackage(String[]) |
| * @since 3.5 |
| */ |
| public String findSource(String typeName, String packageName) { |
| return null; |
| } |
| |
| /** |
| * Returns whether the given package segments represent a package. |
| * <p>This method is called before the normal lookup (i.e. before looking |
| * at the project's classpath and before looking at the working copies of this |
| * owner.)</p> |
| * <p>This allows to provide packages that are not normally available.</p> |
| * <p>If <code>false</code> is returned, then normal lookup is used on |
| * this package.</p> |
| * |
| * @param pkg the segments of a package to lookup |
| * @return whether the given package segments represent a package. |
| * @see #findSource(String, String) |
| * @since 3.5 |
| */ |
| public boolean isPackage(String[] pkg) { |
| return false; |
| } |
| |
| /** |
| * Returns a new working copy with the given name using this working copy owner to |
| * create its buffer. |
| * <p> |
| * This working copy always belongs to the default package in a package |
| * fragment root that corresponds to its Java project, and this Java project never exists. |
| * However this Java project has the given classpath that is used when resolving names |
| * in this working copy. |
| * </p><p> |
| * A DOM AST created using this working copy will have bindings resolved using the given |
| * classpath, and problem are reported to the given problem requestor. |
| * <p></p> |
| * <code>JavaCore#getOptions()</code> is used to create the DOM AST as it is not |
| * possible to set the options on the non-existing Java project. |
| * </p><p> |
| * When the working copy instance is created, an {@link IJavaElementDelta#ADDED added delta} is |
| * reported on this working copy. |
| * </p><p> |
| * Once done with the working copy, users of this method must discard it using |
| * {@link ICompilationUnit#discardWorkingCopy()}. |
| * </p><p> |
| * Note that when such working copy is committed, only its buffer is saved (see |
| * {@link IBuffer#save(IProgressMonitor, boolean)}) but no resource is created. |
| * </p><p> |
| * This method is not intended to be overriden by clients. |
| * </p> |
| * |
| * @param name the name of the working copy (e.g. "X.java") |
| * @param classpath the classpath used to resolve names in this working copy |
| * @param problemRequestor a requestor which will get notified of problems detected during |
| * reconciling as they are discovered. The requestor can be set to <code>null</code> indicating |
| * that the client is not interested in problems. |
| * @param monitor a progress monitor used to report progress while opening the working copy |
| * or <code>null</code> if no progress should be reported |
| * @throws JavaModelException if the contents of this working copy can |
| * not be determined. |
| * @return a new working copy |
| * @see ICompilationUnit#becomeWorkingCopy(IProblemRequestor, IProgressMonitor) |
| * @since 3.2 |
| * |
| * @deprecated Use {@link #newWorkingCopy(String, IClasspathEntry[], IProgressMonitor)} instead. |
| * Note that if this deprecated method is used, problems may be reported twice |
| * if the given requestor is not the same as the current working copy owner one. |
| */ |
| public final ICompilationUnit newWorkingCopy(String name, IClasspathEntry[] classpath, IProblemRequestor problemRequestor, IProgressMonitor monitor) throws JavaModelException { |
| ExternalJavaProject project = new ExternalJavaProject(classpath); |
| IPackageFragment parent = ((PackageFragmentRoot) project.getPackageFragmentRoot(project.getProject())).getPackageFragment(CharOperation.NO_STRINGS); |
| CompilationUnit result = new CompilationUnit((PackageFragment) parent, name, this); |
| result.becomeWorkingCopy(problemRequestor, monitor); |
| return result; |
| } |
| |
| /** |
| * Returns a new working copy with the given name using this working copy owner to |
| * create its buffer. |
| * <p> |
| * This working copy always belongs to the default package in a package |
| * fragment root that corresponds to its Java project, and this Java project never exists. |
| * However this Java project has the given classpath that is used when resolving names |
| * in this working copy. |
| * </p><p> |
| * If a DOM AST is created using this working copy, then given classpath will be used |
| * if bindings need to be resolved. Problems will be reported to the problem requestor |
| * of the current working copy owner problem if it is not <code>null</code>. |
| * <p></p> |
| * Options used to create the DOM AST are got from {@link JavaCore#getOptions()} |
| * as it is not possible to set the options on a non-existing Java project. |
| * </p><p> |
| * When the working copy instance is created, an {@link IJavaElementDelta#ADDED added delta} is |
| * reported on this working copy. |
| * </p><p> |
| * Once done with the working copy, users of this method must discard it using |
| * {@link ICompilationUnit#discardWorkingCopy()}. |
| * </p><p> |
| * Note that when such working copy is committed, only its buffer is saved (see |
| * {@link IBuffer#save(IProgressMonitor, boolean)}) but no resource is created. |
| * </p><p> |
| * This method is not intended to be overriden by clients. |
| * </p> |
| * |
| * @param name the name of the working copy (e.g. "X.java") |
| * @param classpath the classpath used to resolve names in this working copy |
| * @param monitor a progress monitor used to report progress while opening the working copy |
| * or <code>null</code> if no progress should be reported |
| * @throws JavaModelException if the contents of this working copy can |
| * not be determined. |
| * @return a new working copy |
| * @see ICompilationUnit#becomeWorkingCopy(IProgressMonitor) |
| * |
| * @since 3.3 |
| */ |
| public final ICompilationUnit newWorkingCopy(String name, IClasspathEntry[] classpath, IProgressMonitor monitor) throws JavaModelException { |
| ExternalJavaProject project = new ExternalJavaProject(classpath); |
| IPackageFragment parent = ((PackageFragmentRoot) project.getPackageFragmentRoot(project.getProject())).getPackageFragment(CharOperation.NO_STRINGS); |
| CompilationUnit result = new CompilationUnit((PackageFragment) parent, name, this); |
| result.becomeWorkingCopy(getProblemRequestor(result), monitor); |
| return result; |
| } |
| |
| } |