package org.eclipse.jdt.internal.core; | |
/* | |
* (c) Copyright IBM Corp. 2000, 2001. | |
* All Rights Reserved. | |
*/ | |
import org.eclipse.core.resources.*; | |
import org.eclipse.jdt.core.*; | |
import org.eclipse.jdt.core.search.*; | |
import org.eclipse.jdt.internal.core.hierarchy.*; | |
/** | |
* This operation creates an <code>ITypeHierarchy</code> for a specific type within | |
* a specified region, or for all types within a region. The specified | |
* region limits the number of resolved subtypes (i.e. 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 fTypeHierarchy; | |
/** | |
* 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(IType element, IRegion region, IJavaProject project, boolean computeSubtypes) throws JavaModelException { | |
super(element); | |
fTypeHierarchy = new RegionBasedTypeHierarchy(region, project, element, computeSubtypes); | |
} | |
/** | |
* Constructs an operation to create a type hierarchy for the | |
* given type. | |
*/ | |
public CreateTypeHierarchyOperation(IType element, IJavaSearchScope scope, boolean computeSubtypes) throws JavaModelException { | |
super(element); | |
fTypeHierarchy = new TypeHierarchy(element, scope, computeSubtypes); | |
} | |
/** | |
* Performs the operation - creates the type hierarchy | |
* @exception JavaModelException The operation has failed. | |
*/ | |
protected void executeOperation() throws JavaModelException { | |
fTypeHierarchy.refresh(this); | |
} | |
/** | |
* Returns the generated type hierarchy. | |
*/ | |
public ITypeHierarchy getResult() { | |
return fTypeHierarchy; | |
} | |
/** | |
* @see JavaModelOperation | |
*/ | |
public boolean isReadOnly() { | |
return true; | |
} | |
/** | |
* Possible failures: <ul> | |
* <li>NO_ELEMENTS_TO_PROCESS - at least one of a type or region must | |
* be provided to generate a type hierarchy. | |
* <li>ELEMENT_NOT_PRESENT - the provided type or type's project does not exist | |
* </ul> | |
*/ | |
public IJavaModelStatus verify() { | |
IJavaElement elementToProcess= getElementToProcess(); | |
if (elementToProcess == null && !(fTypeHierarchy 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 = fTypeHierarchy.javaProject(); | |
if (project != null && !project.exists()) { | |
return new JavaModelStatus(IJavaModelStatusConstants.ELEMENT_DOES_NOT_EXIST, project); | |
} | |
return JavaModelStatus.VERIFIED_OK; | |
} | |
} |