Copyright (c) 2000, 2008 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
/*******************************************************************************
 * Copyright (c) 2000, 2008 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.jdt.internal.core;

import org.eclipse.core.resources.*;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jdt.core.*;
import org.eclipse.jdt.internal.core.util.Messages;

public class CopyPackageFragmentRootOperation extends JavaModelOperation {
	IPath destination;
	int updateResourceFlags;
	int updateModelFlags;
	IClasspathEntry sibling;

	public CopyPackageFragmentRootOperation(
		IPackageFragmentRoot root,
		IPath destination,
		int updateResourceFlags,
		int updateModelFlags,
		IClasspathEntry sibling) {

		super(root);
		this.destination = destination;
		this.updateResourceFlags = updateResourceFlags;
		this.updateModelFlags = updateModelFlags;
		this.sibling = sibling;
	}
	@Override
	protected void executeOperation() throws JavaModelException {

		IPackageFragmentRoot root = (IPackageFragmentRoot)getElementToProcess();
		IClasspathEntry rootEntry = root.getRawClasspathEntry();
		IWorkspaceRoot workspaceRoot = ResourcesPlugin.getWorkspace().getRoot();

		// copy resource
		if (!root.isExternal() && (this.updateModelFlags & IPackageFragmentRoot.NO_RESOURCE_MODIFICATION) == 0) {
			copyResource(root, rootEntry, workspaceRoot);
		}

		// update classpath if needed
		if ((this.updateModelFlags & IPackageFragmentRoot.DESTINATION_PROJECT_CLASSPATH) != 0) {
			addEntryToClasspath(rootEntry, workspaceRoot);
		}
	}
	protected void copyResource(
		IPackageFragmentRoot root,
		IClasspathEntry rootEntry,
		final IWorkspaceRoot workspaceRoot)
		throws JavaModelException {
		final char[][] exclusionPatterns = ((ClasspathEntry)rootEntry).fullExclusionPatternChars();
		IResource rootResource = ((JavaElement) root).resource();
		if (root.getKind() == IPackageFragmentRoot.K_BINARY || exclusionPatterns == null) {
			try {
				IResource destRes;
				if ((this.updateModelFlags & IPackageFragmentRoot.REPLACE) != 0) {
					if (rootEntry.getPath().equals(this.destination)) return;
					if ((destRes = workspaceRoot.findMember(this.destination)) != null) {
						destRes.delete(this.updateResourceFlags, this.progressMonitor);
					}
				}
				rootResource.copy(this.destination, this.updateResourceFlags, this.progressMonitor);
			} catch (CoreException e) {
				throw new JavaModelException(e);
			}
		} else {
			final int sourceSegmentCount = rootEntry.getPath().segmentCount();
			final IFolder destFolder = workspaceRoot.getFolder(this.destination);
			final IPath[] nestedFolders = getNestedFolders(root);
			IResourceProxyVisitor visitor = new IResourceProxyVisitor() {
				@Override
				public boolean visit(IResourceProxy proxy) throws CoreException {
					if (proxy.getType() == IResource.FOLDER) {
						IPath path = proxy.requestFullPath();
						if (prefixesOneOf(path, nestedFolders)) {
							if (equalsOneOf(path, nestedFolders)) {
								// nested source folder
								return false;
							} else {
								// folder containing nested source folder
								IFolder folder = destFolder.getFolder(path.removeFirstSegments(sourceSegmentCount));
								if ((CopyPackageFragmentRootOperation.this.updateModelFlags & IPackageFragmentRoot.REPLACE) != 0
										&& folder.exists()) {
									return true;
								}
								folder.create(CopyPackageFragmentRootOperation.this.updateResourceFlags, true, CopyPackageFragmentRootOperation.this.progressMonitor);
								return true;
							}
						} else {
							// subtree doesn't contain any nested source folders
							IPath destPath = CopyPackageFragmentRootOperation.this.destination.append(path.removeFirstSegments(sourceSegmentCount));
							IResource destRes;
							if ((CopyPackageFragmentRootOperation.this.updateModelFlags & IPackageFragmentRoot.REPLACE) != 0
									&& (destRes = workspaceRoot.findMember(destPath)) != null) {
								destRes.delete(CopyPackageFragmentRootOperation.this.updateResourceFlags, CopyPackageFragmentRootOperation.this.progressMonitor);
							}
							proxy.requestResource().copy(destPath, CopyPackageFragmentRootOperation.this.updateResourceFlags, CopyPackageFragmentRootOperation.this.progressMonitor);
							return false;
						}
					} else {
						IPath path = proxy.requestFullPath();
						IPath destPath = CopyPackageFragmentRootOperation.this.destination.append(path.removeFirstSegments(sourceSegmentCount));
						IResource destRes;
						if ((CopyPackageFragmentRootOperation.this.updateModelFlags & IPackageFragmentRoot.REPLACE) != 0
								&& (destRes = workspaceRoot.findMember(destPath)) != null) {
							destRes.delete(CopyPackageFragmentRootOperation.this.updateResourceFlags, CopyPackageFragmentRootOperation.this.progressMonitor);
						}
						proxy.requestResource().copy(destPath, CopyPackageFragmentRootOperation.this.updateResourceFlags, CopyPackageFragmentRootOperation.this.progressMonitor);
						return false;
					}
				}
			};
			try {
				rootResource.accept(visitor, IResource.NONE);
			} catch (CoreException e) {
				throw new JavaModelException(e);
			}
		}
		setAttribute(HAS_MODIFIED_RESOURCE_ATTR, TRUE);
	}
	protected void addEntryToClasspath(IClasspathEntry rootEntry, IWorkspaceRoot workspaceRoot) throws JavaModelException {

		IProject destProject = workspaceRoot.getProject(this.destination.segment(0));
		IJavaProject jProject = JavaCore.create(destProject);
		IClasspathEntry[] classpath = jProject.getRawClasspath();
		int length = classpath.length;
		IClasspathEntry[] newClasspath;

		// case of existing entry and REPLACE was specified
		if ((this.updateModelFlags & IPackageFragmentRoot.REPLACE) != 0) {
			// find existing entry
			for (int i = 0; i < length; i++) {
				if (this.destination.equals(classpath[i].getPath())) {
					newClasspath = new IClasspathEntry[length];
					System.arraycopy(classpath, 0, newClasspath, 0, length);
					newClasspath[i] = copy(rootEntry);
					jProject.setRawClasspath(newClasspath, this.progressMonitor);
					return;
				}
			}
		}

		// other cases
		int position;
		if (this.sibling == null) {
			// insert at the end
			position = length;
		} else {
			// insert before sibling
			position = -1;
			for (int i = 0; i < length; i++) {
				if (this.sibling.equals(classpath[i])) {
					position = i;
					break;
				}
			}
		}
		if (position == -1) {
			throw new JavaModelException(new JavaModelStatus(IJavaModelStatusConstants.INVALID_SIBLING, this.sibling.toString()));
		}
		newClasspath = new IClasspathEntry[length+1];
		if (position != 0) {
			System.arraycopy(classpath, 0, newClasspath, 0, position);
		}
		if (position != length) {
			System.arraycopy(classpath, position, newClasspath, position+1, length-position);
		}
		IClasspathEntry newEntry = copy(rootEntry);
		newClasspath[position] = newEntry;
		jProject.setRawClasspath(newClasspath, this.progressMonitor);
	}
	/*
	 * Copies the given classpath entry replacing its path with the destination path
	 * if it is a source folder or a library.
	 */
	protected IClasspathEntry copy(IClasspathEntry entry) throws JavaModelException {
		switch (entry.getEntryKind()) {
			case IClasspathEntry.CPE_CONTAINER:
				return JavaCore.newContainerEntry(entry.getPath(), entry.getAccessRules(), entry.getExtraAttributes(), entry.isExported());
			case IClasspathEntry.CPE_LIBRARY:
				try {
					return JavaCore.newLibraryEntry(this.destination, entry.getSourceAttachmentPath(), entry.getSourceAttachmentRootPath(), entry.getAccessRules(), entry.getExtraAttributes(), entry.isExported());
				} catch (ClasspathEntry.AssertionFailedException e) {
					IJavaModelStatus status = new JavaModelStatus(IJavaModelStatusConstants.INVALID_PATH, e.getMessage());
					throw new JavaModelException(status);
				}
			case IClasspathEntry.CPE_PROJECT:
				return JavaCore.newProjectEntry(entry.getPath(), entry.getAccessRules(), entry.combineAccessRules(), entry.getExtraAttributes(), entry.isExported());
			case IClasspathEntry.CPE_SOURCE:
				return JavaCore.newSourceEntry(this.destination, entry.getInclusionPatterns(), entry.getExclusionPatterns(), entry.getOutputLocation(), entry.getExtraAttributes());
			case IClasspathEntry.CPE_VARIABLE:
				try {
					return JavaCore.newVariableEntry(entry.getPath(), entry.getSourceAttachmentPath(), entry.getSourceAttachmentRootPath(), entry.getAccessRules(), entry.getExtraAttributes(), entry.isExported());
				} catch (ClasspathEntry.AssertionFailedException e) {
					IJavaModelStatus status = new JavaModelStatus(IJavaModelStatusConstants.INVALID_PATH, e.getMessage());
					throw new JavaModelException(status);
				}
			default:
				throw new JavaModelException(new JavaModelStatus(IJavaModelStatusConstants.ELEMENT_DOES_NOT_EXIST, getElementToProcess()));
		}
	}
	@Override
	public IJavaModelStatus verify() {
		IJavaModelStatus status = super.verify();
		if (!status.isOK()) {
			return status;
		}
		PackageFragmentRoot root = (PackageFragmentRoot)getElementToProcess();
		if (root == null || !root.exists()) {
			return new JavaModelStatus(IJavaModelStatusConstants.ELEMENT_DOES_NOT_EXIST, root);
		}

		IResource resource = root.resource();
		if (resource instanceof IFolder) {
			if (resource.isLinked()) {
				return new JavaModelStatus(IJavaModelStatusConstants.INVALID_RESOURCE, root);
			}
		}

		if ((this.updateModelFlags & IPackageFragmentRoot.DESTINATION_PROJECT_CLASSPATH) != 0) {
			String destProjectName = this.destination.segment(0);
			IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject(destProjectName);
			if (JavaProject.hasJavaNature(project)) {
				try {
					IJavaProject destProject = JavaCore.create(project);
					IClasspathEntry[] destClasspath = destProject.getRawClasspath();
					boolean foundSibling = false;
					boolean foundExistingEntry = false;
					for (int i = 0, length = destClasspath.length; i < length; i++) {
						IClasspathEntry entry = destClasspath[i];
						if (entry.equals(this.sibling)) {
							foundSibling = true;
							break;
						}
						if (entry.getPath().equals(this.destination)) {
							foundExistingEntry = true;
						}
					}
					if (this.sibling != null && !foundSibling) {
						return new JavaModelStatus(IJavaModelStatusConstants.INVALID_SIBLING, this.sibling.toString());
					}
					if (foundExistingEntry && (this.updateModelFlags & IPackageFragmentRoot.REPLACE) == 0) {
						return new JavaModelStatus(
							IJavaModelStatusConstants.NAME_COLLISION,
							Messages.bind(Messages.status_nameCollision, new String[] {this.destination.toString()}));
					}
				} catch (JavaModelException e) {
					return e.getJavaModelStatus();
				}
			}
		}

		return JavaModelStatus.VERIFIED_OK;
	}
}