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/*******************************************************************************
* 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.internal.core;
import org.eclipse.jdt.core.*;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaModelStatus;
import org.eclipse.jdt.core.IJavaModelStatusConstants;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IRegion;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.ITypeHierarchy;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.internal.core.hierarchy.RegionBasedTypeHierarchy;
import org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy;
/**
* This operation creates an ITypeHierarchy for a specific type within
* a specified region, or for all types within a region. The specified
* region limits the number of resolved subtypes (to the subset of
* types in the specified region). The resolved supertypes may go outside
* of the specified region in order to reach the root(s) of the type
* hierarchy. A Java Project is required to provide a context (classpath)
* to use while resolving supertypes and subtypes.
*
* @see ITypeHierarchy
*/
public class CreateTypeHierarchyOperation extends JavaModelOperation {
/**
* The generated type hierarchy
*/
protected TypeHierarchy typeHierarchy;
/**
* Constructs an operation to create a type hierarchy for the
* given type within the specified region, in the context of
* the given project.
*/
public CreateTypeHierarchyOperation(IRegion region, ICompilationUnit[] workingCopies, IType element, boolean computeSubtypes) {
super(element);
this.typeHierarchy = new RegionBasedTypeHierarchy(region, workingCopies, element, computeSubtypes);
}
/**
* Constructs an operation to create a type hierarchy for the
* given type and working copies.
*/
public CreateTypeHierarchyOperation(IType element, ICompilationUnit[] workingCopies, IJavaSearchScope scope, boolean computeSubtypes) {
super(element);
ICompilationUnit[] copies;
if (workingCopies != null) {
int length = workingCopies.length;
copies = new ICompilationUnit[length];
System.arraycopy(workingCopies, 0, copies, 0, length);
} else {
copies = null;
}
this.typeHierarchy = new TypeHierarchy(element, copies, scope, computeSubtypes);
}
/**
* Constructs an operation to create a type hierarchy for the
* given type and working copies.
*/
public CreateTypeHierarchyOperation(IType element, ICompilationUnit[] workingCopies, IJavaProject project, boolean computeSubtypes) {
super(element);
ICompilationUnit[] copies;
if (workingCopies != null) {
int length = workingCopies.length;
copies = new ICompilationUnit[length];
System.arraycopy(workingCopies, 0, copies, 0, length);
} else {
copies = null;
}
this.typeHierarchy = new TypeHierarchy(element, copies, project, computeSubtypes);
}
/**
* Performs the operation - creates the type hierarchy
* @exception JavaModelException The operation has failed.
*/
protected void executeOperation() throws JavaModelException {
this.typeHierarchy.refresh(this);
}
/**
* Returns the generated type hierarchy.
*/
public ITypeHierarchy getResult() {
return this.typeHierarchy;
}
/**
* @see JavaModelOperation
*/
public boolean isReadOnly() {
return true;
}
/**
* Possible failures:
*
NO_ELEMENTS_TO_PROCESS - at least one of a type or region must
* be provided to generate a type hierarchy.
*
ELEMENT_NOT_PRESENT - the provided type or type's project does not exist
*
*/
public IJavaModelStatus verify() {
IJavaElement elementToProcess= getElementToProcess();
if (elementToProcess == null && !(this.typeHierarchy instanceof RegionBasedTypeHierarchy)) {
return new JavaModelStatus(IJavaModelStatusConstants.NO_ELEMENTS_TO_PROCESS);
}
if (elementToProcess != null && !elementToProcess.exists()) {
return new JavaModelStatus(IJavaModelStatusConstants.ELEMENT_DOES_NOT_EXIST, elementToProcess);
}
IJavaProject project = this.typeHierarchy.javaProject();
if (project != null && !project.exists()) {
return new JavaModelStatus(IJavaModelStatusConstants.ELEMENT_DOES_NOT_EXIST, project);
}
return JavaModelStatus.VERIFIED_OK;
}
}
