| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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.internal.corext.buildpath; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| |
| import org.eclipse.jface.operation.IRunnableWithProgress; |
| |
| import org.eclipse.jdt.core.JavaModelException; |
| |
| import org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.DialogPackageExplorerActionGroup; |
| |
| |
| /** |
| * Abstract class which represents classpath modifier operation, this is, |
| * Operation that call methods on <code>ClasspathModifier</code>. |
| */ |
| public abstract class ClasspathModifierOperation extends ClasspathModifier implements IRunnableWithProgress { |
| protected IClasspathInformationProvider fInformationProvider; |
| protected CoreException fException; |
| private int fType; |
| /** |
| * A human readable name for this operation |
| */ |
| private String fName; |
| |
| /** |
| * Constructor |
| * |
| * @param listener a <code>IClasspathModifierListener</code> that is notified about |
| * changes on classpath entries or <code>null</code> if no such notification is |
| * necessary. |
| * @param informationProvider a provider to offer information to the operation |
| * @param name a human readable name for this operation |
| * @param type the type of the operation, that is a constant of <code> |
| * IClasspathInformationProvider</code> |
| * |
| * @see IClasspathInformationProvider |
| * @see ClasspathModifier |
| */ |
| public ClasspathModifierOperation(IClasspathModifierListener listener, IClasspathInformationProvider informationProvider, String name, int type) { |
| super(listener); |
| fInformationProvider= informationProvider; |
| fException= null; |
| fName= name; |
| fType= type; |
| } |
| |
| protected void handleResult(List result, IProgressMonitor monitor) throws InvocationTargetException{ |
| /* |
| * if (fMonitor != null && fException != null) then |
| * the action was called with the run method of |
| * the IRunnableWithProgress which will throw an |
| * InvocationTargetException in the case that an |
| * exception ocurred. Then error handling is |
| * done by the client which called run(monitor). |
| * |
| * Otherwise we pass the information back to the |
| * information provider. |
| */ |
| if (monitor == null || fException == null) |
| fInformationProvider.handleResult(result, fException, fType); |
| else |
| throw new InvocationTargetException(fException); |
| fException= null; |
| } |
| |
| /** |
| * Method which runs the actions with a progress monitor.<br> |
| * |
| * @param monitor a progress monitor, can be <code>null</code> |
| */ |
| public abstract void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException; |
| |
| /** |
| * Get the type converted into a string. |
| * |
| * @return the ID (that is the type) of this operation as string. |
| */ |
| public String getId() { |
| return Integer.toString(fType); |
| } |
| |
| /** |
| * Find out whether this operation can be executed on |
| * the provided list of elements. |
| * |
| * @param elements a list of elements |
| * @param types an array of types for each element, that is, |
| * the type at position 'i' belongs to the selected element |
| * at position 'i' |
| * |
| * @return <code>true</code> if the operation can be |
| * executed on the provided list of elements, <code> |
| * false</code> otherwise. |
| * |
| * @throws JavaModelException |
| */ |
| public abstract boolean isValid(List elements, int[] types) throws JavaModelException; |
| |
| /** |
| * Get a description for this operation. The description depends on |
| * the provided type parameter, which must be a constant of |
| * <code>DialogPackageExplorerActionGroup</code>. If the type is |
| * <code>DialogPackageExplorerActionGroup.MULTI</code>, then the |
| * description will be very general to describe the situation of |
| * all the different selected objects as good as possible. |
| * |
| * @param type the type of the selected object, must be a constant of |
| * <code>DialogPackageExplorerActionGroup</code>. |
| * @return a string describing the operation. |
| */ |
| public abstract String getDescription(int type); |
| |
| public String getName() { |
| return fName; |
| } |
| |
| public List getSelectedElements() { |
| return fInformationProvider.getSelection().toList(); |
| } |
| |
| public int getTypeId() { |
| return fType; |
| } |
| |
| public boolean isValid() throws JavaModelException { |
| List selectedElements= getSelectedElements(); |
| int[] types= new int[selectedElements.size()]; |
| for(int i= 0; i < types.length; i++) { |
| types[i]= DialogPackageExplorerActionGroup.getType(selectedElements.get(i), fInformationProvider.getJavaProject()); |
| } |
| return isValid(selectedElements, types); |
| } |
| } |