/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package net.sourceforge.phpdt.core;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.runtime.IProgressMonitor;

/**
 * Represent the root Java element corresponding to the workspace. Since there
 * is only one such root element, it is commonly referred to as <em>the</em>
 * Java model element. The Java model element needs to be opened before it can
 * be navigated or manipulated. The Java model element has no parent (it is the
 * root of the Java element hierarchy). Its children are
 * <code>IJavaProject</code>s.
 * <p>
 * This interface provides methods for performing copy, move, rename, and delete
 * operations on multiple Java elements.
 * </p>
 * <p>
 * This interface is not intended to be implemented by clients. An instance of
 * one of these handles can be created via
 * <code>JavaCore.create(workspace.getRoot())</code>.
 * </p>
 * 
 * @see JavaCore#create(org.eclipse.core.resources.IWorkspaceRoot)
 */
public interface IJavaModel extends IJavaElement, IOpenable, IParent {
	/**
	 * Returns whether this Java model contains an <code>IJavaElement</code>
	 * whose resource is the given resource or a non-Java resource which is the
	 * given resource.
	 * <p>
	 * Note: no existency check is performed on the argument resource. If it is
	 * not accessible (see <code>IResource.isAccessible()</code>) yet but
	 * would be located in Java model range, then it will return
	 * <code>true</code>.
	 * </p>
	 * <p>
	 * If the resource is accessible, it can be reached by navigating the Java
	 * model down using the <code>getChildren()</code> and/or
	 * <code>getNonJavaResources()</code> methods.
	 * </p>
	 * 
	 * @param resource
	 *            the resource to check
	 * @return true if the resource is accessible through the Java model
	 * @since 2.1
	 */
	boolean contains(IResource resource);

	/**
	 * Copies the given elements to the specified container(s). If one container
	 * is specified, all elements are copied to that container. If more than one
	 * container is specified, the number of elements and containers must match,
	 * and each element is copied to its associated container.
	 * <p>
	 * Optionally, each copy can positioned before a sibling element. If
	 * <code>null</code> is specified for a given sibling, the copy is
	 * inserted as the last child of its associated container.
	 * </p>
	 * <p>
	 * Optionally, each copy can be renamed. If <code>null</code> is specified
	 * for the new name, the copy is not renamed.
	 * </p>
	 * <p>
	 * Optionally, any existing child in the destination container with the same
	 * name can be replaced by specifying <code>true</code> for force.
	 * Otherwise an exception is thrown in the event that a name collision
	 * occurs.
	 * </p>
	 * 
	 * @param elements
	 *            the elements to copy
	 * @param containers
	 *            the container, or list of containers
	 * @param siblings
	 *            the list of siblings element any of which may be
	 *            <code>null</code>; or <code>null</code>
	 * @param renamings
	 *            the list of new names any of which may be <code>null</code>;
	 *            or <code>null</code>
	 * @param replace
	 *            <code>true</code> if any existing child in a target
	 *            container with the target name should be replaced, and
	 *            <code>false</code> to throw an exception in the event of a
	 *            name collision
	 * @param monitor
	 *            a progress monitor
	 * @exception JavaModelException
	 *                if an element could not be copied. Reasons include:
	 *                <ul>
	 *                <li> There is no element to process
	 *                (NO_ELEMENTS_TO_PROCESS). The given elements is null or
	 *                empty</li>
	 *                <li> A specified element, container, or sibling does not
	 *                exist (ELEMENT_DOES_NOT_EXIST)</li>
	 *                <li> A <code>CoreException</code> occurred while
	 *                updating an underlying resource</li>
	 *                <li> A container is of an incompatible type (<code>INVALID_DESTINATION</code>)</li>
	 *                <li> A sibling is not a child of it associated container (<code>INVALID_SIBLING</code>)</li>
	 *                <li> A new name is invalid (<code>INVALID_NAME</code>)</li>
	 *                <li> A child in its associated container already exists
	 *                with the same name and <code>replace</code> has been
	 *                specified as <code>false</code> (<code>NAME_COLLISION</code>)</li>
	 *                <li> A container or element is read-only (<code>READ_ONLY</code>)
	 *                </li>
	 *                </ul>
	 */
	void copy(IJavaElement[] elements, IJavaElement[] containers,
			IJavaElement[] siblings, String[] renamings, boolean replace,
			IProgressMonitor monitor) throws JavaModelException;

	/**
	 * Deletes the given elements, forcing the operation if necessary and
	 * specified.
	 * 
	 * @param elements
	 *            the elements to delete
	 * @param force
	 *            a flag controlling whether underlying resources that are not
	 *            in sync with the local file system will be tolerated
	 * @param monitor
	 *            a progress monitor
	 * @exception JavaModelException
	 *                if an element could not be deleted. Reasons include:
	 *                <ul>
	 *                <li> There is no element to process
	 *                (NO_ELEMENTS_TO_PROCESS). The given elements is null or
	 *                empty</li>
	 *                <li> A specified element does not exist
	 *                (ELEMENT_DOES_NOT_EXIST)</li>
	 *                <li> A <code>CoreException</code> occurred while
	 *                updating an underlying resource</li>
	 *                <li> An element is read-only (<code>READ_ONLY</code>)
	 *                </li>
	 *                </ul>
	 */
	void delete(IJavaElement[] elements, boolean force, IProgressMonitor monitor)
			throws JavaModelException;

	/**
	 * Returns the Java project with the given name. This is a handle-only
	 * method. The project may or may not exist.
	 * 
	 * @return the Java project with the given name
	 */
	IJavaProject getJavaProject(String name);

	/**
	 * Returns the Java projects in this Java model, or an empty array if there
	 * are none.
	 * 
	 * @return the Java projects in this Java model, or an empty array if there
	 *         are none
	 * @exception JavaModelException
	 *                if this request fails.
	 */
	IJavaProject[] getJavaProjects() throws JavaModelException;

	/**
	 * Returns an array of non-Java resources (that is, non-Java projects) in
	 * the workspace.
	 * <p>
	 * Non-Java projects include all projects that are closed (even if they have
	 * the Java nature).
	 * </p>
	 * 
	 * @return an array of non-Java projects contained in the workspace.
	 * @throws JavaModelException
	 *             if this element does not exist or if an exception occurs
	 *             while accessing its corresponding resource
	 * @since 2.1
	 */
	// Object[] getNonJavaResources() throws JavaModelException;
	/**
	 * Returns the workspace associated with this Java model.
	 * 
	 * @return the workspace associated with this Java model
	 */
	IWorkspace getWorkspace();

	/**
	 * Moves the given elements to the specified container(s). If one container
	 * is specified, all elements are moved to that container. If more than one
	 * container is specified, the number of elements and containers must match,
	 * and each element is moved to its associated container.
	 * <p>
	 * Optionally, each element can positioned before a sibling element. If
	 * <code>null</code> is specified for sibling, the element is inserted as
	 * the last child of its associated container.
	 * </p>
	 * <p>
	 * Optionally, each element can be renamed. If <code>null</code> is
	 * specified for the new name, the element is not renamed.
	 * </p>
	 * <p>
	 * Optionally, any existing child in the destination container with the same
	 * name can be replaced by specifying <code>true</code> for force.
	 * Otherwise an exception is thrown in the event that a name collision
	 * occurs.
	 * </p>
	 * 
	 * @param elements
	 *            the elements to move
	 * @param containers
	 *            the container, or list of containers
	 * @param siblings
	 *            the list of siblings element any of which may be
	 *            <code>null</code>; or <code>null</code>
	 * @param renamings
	 *            the list of new names any of which may be <code>null</code>;
	 *            or <code>null</code>
	 * @param replace
	 *            <code>true</code> if any existing child in a target
	 *            container with the target name should be replaced, and
	 *            <code>false</code> to throw an exception in the event of a
	 *            name collision
	 * @param monitor
	 *            a progress monitor
	 * @exception JavaModelException
	 *                if an element could not be moved. Reasons include:
	 *                <ul>
	 *                <li> There is no element to process
	 *                (NO_ELEMENTS_TO_PROCESS). The given elements is null or
	 *                empty</li>
	 *                <li> A specified element, container, or sibling does not
	 *                exist (ELEMENT_DOES_NOT_EXIST)</li>
	 *                <li> A <code>CoreException</code> occurred while
	 *                updating an underlying resource</li>
	 *                <li> A container is of an incompatible type (<code>INVALID_DESTINATION</code>)</li>
	 *                <li> A sibling is not a child of it associated container (<code>INVALID_SIBLING</code>)</li>
	 *                <li> A new name is invalid (<code>INVALID_NAME</code>)</li>
	 *                <li> A child in its associated container already exists
	 *                with the same name and <code>replace</code> has been
	 *                specified as <code>false</code> (<code>NAME_COLLISION</code>)</li>
	 *                <li> A container or element is read-only (<code>READ_ONLY</code>)
	 *                </li>
	 *                </ul>
	 * 
	 * @exception IllegalArgumentException
	 *                any element or container is <code>null</code>
	 */
	void move(IJavaElement[] elements, IJavaElement[] containers,
			IJavaElement[] siblings, String[] renamings, boolean replace,
			IProgressMonitor monitor) throws JavaModelException;

	/**
	 * Triggers an update of the JavaModel with respect to the referenced
	 * external archives. This operation will issue a JavaModel delta describing
	 * the discovered changes, in term of Java element package fragment roots
	 * added, removed or changed. Note that a collection of elements can be
	 * passed so as to narrow the set of archives to refresh (passing
	 * <code>null</code> along is equivalent to refreshing the entire mode).
	 * The elements can be:
	 * <ul>
	 * <li> package fragment roots corresponding to external archives
	 * <li> Java projects, which referenced external archives will be refreshed
	 * <li> Java model, all referenced external archives will be refreshed.
	 * </ul>
	 * <p>
	 * In case an archive is used by multiple projects, the delta issued will
	 * account for all of them. This means that even if a project was not part
	 * of the elements scope, it may still be notified of changes if it is
	 * referencing a library comprised in the scope.
	 * <p>
	 * 
	 * @param elementsScope -
	 *            a collection of elements defining the scope of the refresh
	 * @param monitor -
	 *            a progress monitor used to report progress
	 * @exception JavaModelException
	 *                in one of the corresponding situation:
	 *                <ul>
	 *                <li> an exception occurs while accessing project resources
	 *                </li>
	 *                </ul>
	 * 
	 * @see IJavaElementDelta
	 * @since 2.0
	 */
	// void refreshExternalArchives(IJavaElement[] elementsScope,
	// IProgressMonitor monitor) throws JavaModelException;
	/**
	 * Renames the given elements as specified. If one container is specified,
	 * all elements are renamed within that container. If more than one
	 * container is specified, the number of elements and containers must match,
	 * and each element is renamed within its associated container.
	 * 
	 * @param elements
	 *            the elements to rename
	 * @param destinations
	 *            the container, or list of containers
	 * @param names
	 *            the list of new names
	 * @param replace
	 *            <code>true</code> if an existing child in a target container
	 *            with the target name should be replaced, and
	 *            <code>false</code> to throw an exception in the event of a
	 *            name collision
	 * @param monitor
	 *            a progress monitor
	 * @exception JavaModelException
	 *                if an element could not be renamed. Reasons include:
	 *                <ul>
	 *                <li> There is no element to process
	 *                (NO_ELEMENTS_TO_PROCESS). The given elements is null or
	 *                empty</li>
	 *                <li> A specified element does not exist
	 *                (ELEMENT_DOES_NOT_EXIST)</li>
	 *                <li> A <code>CoreException</code> occurred while
	 *                updating an underlying resource
	 *                <li> A new name is invalid (<code>INVALID_NAME</code>)
	 *                <li> A child already exists with the same name and
	 *                <code>replace</code> has been specified as
	 *                <code>false</code> (<code>NAME_COLLISION</code>)
	 *                <li> An element is read-only (<code>READ_ONLY</code>)
	 *                </ul>
	 */
	void rename(IJavaElement[] elements, IJavaElement[] destinations,
			String[] names, boolean replace, IProgressMonitor monitor)
			throws JavaModelException;

}
