/*******************************************************************************
* Copyright (c) 2005, 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.wst.jsdt.internal.corext.refactoring;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.wst.jsdt.core.IField;
import org.eclipse.wst.jsdt.core.IFunction;
import org.eclipse.wst.jsdt.core.IIncludePathEntry;
import org.eclipse.wst.jsdt.core.IJavaScriptElement;
import org.eclipse.wst.jsdt.core.IJavaScriptModel;
import org.eclipse.wst.jsdt.core.IJavaScriptProject;
import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
import org.eclipse.wst.jsdt.core.ILocalVariable;
import org.eclipse.wst.jsdt.core.IMember;
import org.eclipse.wst.jsdt.core.IPackageFragment;
import org.eclipse.wst.jsdt.core.IPackageFragmentRoot;
import org.eclipse.wst.jsdt.core.IType;
import org.eclipse.wst.jsdt.core.JavaScriptModelException;
import org.eclipse.wst.jsdt.core.Signature;
import org.eclipse.wst.jsdt.core.dom.ASTNode;
import org.eclipse.wst.jsdt.core.dom.ClassInstanceCreation;
import org.eclipse.wst.jsdt.core.dom.ExpressionStatement;
import org.eclipse.wst.jsdt.core.dom.PrimitiveType;
import org.eclipse.wst.jsdt.core.dom.Statement;
import org.eclipse.wst.jsdt.core.infer.IInferenceFile;
import org.eclipse.wst.jsdt.core.infer.InferrenceManager;
import org.eclipse.wst.jsdt.core.infer.InferrenceProvider;
import org.eclipse.wst.jsdt.core.infer.RefactoringSupport;
import org.eclipse.wst.jsdt.internal.corext.SourceRange;
import org.eclipse.wst.jsdt.internal.corext.dom.ASTNodes;
import org.eclipse.wst.jsdt.internal.corext.refactoring.rename.MethodChecks;
import org.eclipse.wst.jsdt.internal.corext.refactoring.reorg.ReorgPolicyFactory;
import org.eclipse.wst.jsdt.internal.corext.refactoring.reorg.ReorgUtils;
import org.eclipse.wst.jsdt.internal.corext.refactoring.util.JavaElementUtil;
import org.eclipse.wst.jsdt.internal.corext.util.JavaModelUtil;
import org.eclipse.wst.jsdt.internal.corext.util.JdtFlags;
import org.eclipse.wst.jsdt.internal.ui.javaeditor.JavaTextSelection;
import org.eclipse.wst.jsdt.internal.ui.refactoring.actions.RefactoringActions;
/**
* Helper class to detect whether a certain refactoring can be enabled on a
* selection.
* <p>
* This class has been introduced to decouple actions from the refactoring code,
* in order not to eagerly load refactoring classes during action
* initialization.
* </p>
*
*
*/
public final class RefactoringAvailabilityTester {
public static IType getDeclaringType(IJavaScriptElement element) {
if (element == null)
return null;
if (!(element instanceof IType))
element= element.getAncestor(IJavaScriptElement.TYPE);
return (IType) element;
}
public static IJavaScriptElement[] getJavaElements(final Object[] elements) {
List result= new ArrayList();
for (int index= 0; index < elements.length; index++) {
if (elements[index] instanceof IJavaScriptElement)
result.add(elements[index]);
}
return (IJavaScriptElement[]) result.toArray(new IJavaScriptElement[result.size()]);
}
public static IMember[] getPullUpMembers(final IType type) throws JavaScriptModelException {
final List list= new ArrayList(3);
if (type.exists()) {
IMember[] members= type.getFields();
for (int index= 0; index < members.length; index++) {
if (isPullUpAvailable(members[index]))
list.add(members[index]);
}
members= type.getFunctions();
for (int index= 0; index < members.length; index++) {
if (isPullUpAvailable(members[index]))
list.add(members[index]);
}
members= type.getTypes();
for (int index= 0; index < members.length; index++) {
if (isPullUpAvailable(members[index]))
list.add(members[index]);
}
}
return (IMember[]) list.toArray(new IMember[list.size()]);
}
public static IMember[] getPushDownMembers(final IType type) throws JavaScriptModelException {
final List list= new ArrayList(3);
if (type.exists()) {
IMember[] members= type.getFields();
for (int index= 0; index < members.length; index++) {
if (isPushDownAvailable(members[index]))
list.add(members[index]);
}
members= type.getFunctions();
for (int index= 0; index < members.length; index++) {
if (isPushDownAvailable(members[index]))
list.add(members[index]);
}
}
return (IMember[]) list.toArray(new IMember[list.size()]);
}
public static IResource[] getResources(final Object[] elements) {
List result= new ArrayList();
for (int index= 0; index < elements.length; index++) {
if (elements[index] instanceof IResource)
result.add(elements[index]);
}
return (IResource[]) result.toArray(new IResource[result.size()]);
}
public static IType getSingleSelectedType(IStructuredSelection selection) throws JavaScriptModelException {
Object first= selection.getFirstElement();
if (first instanceof IType)
return (IType) first;
if (first instanceof IJavaScriptUnit) {
final IJavaScriptUnit unit= (IJavaScriptUnit) first;
if (unit.exists())
return JavaElementUtil.getMainType(unit);
}
return null;
}
public static IType getTopLevelType(final IMember[] members) {
if (members != null && members.length == 1 && Checks.isTopLevelType(members[0]))
return (IType) members[0];
return null;
}
public static boolean isChangeSignatureAvailable(final IFunction method) throws JavaScriptModelException {
return Checks.isAvailable(method);
}
public static boolean isChangeSignatureAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.size() == 1) {
if (selection.getFirstElement() instanceof IFunction) {
final IFunction method= (IFunction) selection.getFirstElement();
return isChangeSignatureAvailable(method);
}
}
return false;
}
public static boolean isChangeSignatureAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement[] elements= selection.resolveElementAtOffset();
if (elements.length == 1 && (elements[0] instanceof IFunction))
return isChangeSignatureAvailable((IFunction) elements[0]);
final IJavaScriptElement element= selection.resolveEnclosingElement();
return (element instanceof IFunction) && isChangeSignatureAvailable((IFunction) element);
}
public static boolean isCommonDeclaringType(final IMember[] members) {
if (members.length == 0)
return false;
final IType type= members[0].getDeclaringType();
if (type == null)
return false;
for (int index= 0; index < members.length; index++) {
if (!type.equals(members[index].getDeclaringType()))
return false;
}
return true;
}
public static boolean isConvertAnonymousAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.size() == 1) {
if (selection.getFirstElement() instanceof IType) {
return isConvertAnonymousAvailable((IType) selection.getFirstElement());
}
}
return false;
}
public static boolean isConvertAnonymousAvailable(final IType type) throws JavaScriptModelException {
if (Checks.isAvailable(type)) {
return type.isAnonymous();
}
return false;
}
public static boolean isConvertAnonymousAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IType type= RefactoringActions.getEnclosingType(selection);
if (type != null)
return RefactoringAvailabilityTester.isConvertAnonymousAvailable(type);
return false;
}
public static boolean isCopyAvailable(final IResource[] resources, final IJavaScriptElement[] elements) throws JavaScriptModelException {
return ReorgPolicyFactory.createCopyPolicy(resources, elements).canEnable();
}
public static boolean isDelegateCreationAvailable(final IField field) throws JavaScriptModelException {
return false;
}
public static boolean isDeleteAvailable(final IJavaScriptElement element) throws JavaScriptModelException {
if (!element.exists())
return false;
if (element instanceof IJavaScriptModel || element instanceof IJavaScriptProject)
return false;
if (element.getParent() != null && element.getParent().isReadOnly())
return false;
if (element instanceof IPackageFragmentRoot) {
IPackageFragmentRoot root= (IPackageFragmentRoot) element;
if (root.isExternal() || Checks.isClasspathDelete(root)) // TODO
// rename
// isClasspathDelete
return false;
}
if (element.getResource() == null && !RefactoringAvailabilityTester.isWorkingCopyElement(element))
return false;
if (element instanceof IMember && ((IMember) element).isBinary())
return false;
return true;
}
public static boolean isDeleteAvailable(final IResource resource) {
if (!resource.exists() || resource.isPhantom())
return false;
if (resource.getType() == IResource.ROOT || resource.getType() == IResource.PROJECT)
return false;
return true;
}
public static boolean isDeleteAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (!selection.isEmpty())
return isDeleteAvailable(selection.toArray());
return false;
}
public static boolean isDeleteAvailable(final Object[] objects) throws JavaScriptModelException {
if (objects.length != 0) {
final IResource[] resources= RefactoringAvailabilityTester.getResources(objects);
final IJavaScriptElement[] elements= RefactoringAvailabilityTester.getJavaElements(objects);
if (objects.length != resources.length + elements.length)
return false;
for (int index= 0; index < resources.length; index++) {
if (!isDeleteAvailable(resources[index]))
return false;
}
for (int index= 0; index < elements.length; index++) {
if (!isDeleteAvailable(elements[index]))
return false;
}
return true;
}
return false;
}
public static boolean isExternalizeStringsAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
for (Iterator iter= selection.iterator(); iter.hasNext();) {
Object element= iter.next();
if (element instanceof IJavaScriptElement) {
IJavaScriptElement javaElement= (IJavaScriptElement)element;
if (javaElement.exists() && !javaElement.isReadOnly()) {
int elementType= javaElement.getElementType();
if (elementType == IJavaScriptElement.PACKAGE_FRAGMENT) {
return true;
} else if (elementType == IJavaScriptElement.PACKAGE_FRAGMENT_ROOT) {
IPackageFragmentRoot root= (IPackageFragmentRoot)javaElement;
if (!root.isExternal() && !ReorgUtils.isClassFolder(root))
return true;
} else if (elementType == IJavaScriptElement.JAVASCRIPT_PROJECT) {
return true;
} else if (elementType == IJavaScriptElement.JAVASCRIPT_UNIT) {
IJavaScriptUnit cu= (IJavaScriptUnit)javaElement;
if (cu.exists())
return true;
} else if (elementType == IJavaScriptElement.TYPE) {
IType type= (IType)element;
IJavaScriptUnit cu= type.getJavaScriptUnit();
if (cu != null && cu.exists())
return true;
}
}
}
}
return false;
}
public static boolean isExtractConstantAvailable(final JavaTextSelection selection) {
return (selection.resolveInClassInitializer() || selection.resolveInMethodBody() || selection.resolveInVariableInitializer()) && Checks.isExtractableExpression(selection.resolveSelectedNodes(), selection.resolveCoveringNode());
}
public static boolean isExtractInterfaceAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.size() == 1) {
Object first= selection.getFirstElement();
if (first instanceof IType) {
return isExtractInterfaceAvailable((IType) first);
} else if (first instanceof IJavaScriptUnit) {
IJavaScriptUnit unit= (IJavaScriptUnit) first;
if (!unit.exists() || unit.isReadOnly())
return false;
return true;
}
}
return false;
}
public static boolean isExtractInterfaceAvailable(final IType type) throws JavaScriptModelException {
return Checks.isAvailable(type) && !type.isBinary() && !type.isReadOnly() && !type.isAnonymous();
}
public static boolean isExtractInterfaceAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
return isExtractInterfaceAvailable(RefactoringActions.getEnclosingOrPrimaryType(selection));
}
public static boolean isExtractMethodAvailable(final ASTNode[] nodes) {
if (nodes != null && nodes.length != 0) {
if (nodes.length == 1)
return nodes[0] instanceof Statement || Checks.isExtractableExpression(nodes[0]);
else {
for (int index= 0; index < nodes.length; index++) {
if (!(nodes[index] instanceof Statement))
return false;
}
return true;
}
}
return false;
}
public static boolean isExtractMethodAvailable(final JavaTextSelection selection) {
return (selection.resolveInMethodBody() || selection.resolveInClassInitializer()) && RefactoringAvailabilityTester.isExtractMethodAvailable(selection.resolveSelectedNodes());
}
public static boolean isExtractSupertypeAvailable(IMember member) throws JavaScriptModelException {
if (!member.exists())
return false;
final int type= member.getElementType();
if (type != IJavaScriptElement.METHOD && type != IJavaScriptElement.FIELD && type != IJavaScriptElement.TYPE)
return false;
if (!Checks.isAvailable(member))
return false;
if (member instanceof IType) {
if (!JdtFlags.isStatic(member))
return false;
}
if (member instanceof IFunction) {
final IFunction method= (IFunction) member;
if (method.isConstructor())
return false;
}
return true;
}
public static boolean isExtractSupertypeAvailable(final IMember[] members) throws JavaScriptModelException {
if (members != null && members.length != 0) {
final IType type= getTopLevelType(members);
if (type != null)
return true;
for (int index= 0; index < members.length; index++) {
if (!isExtractSupertypeAvailable(members[index]))
return false;
}
return isCommonDeclaringType(members);
}
return false;
}
public static boolean isExtractSupertypeAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (!selection.isEmpty()) {
if (selection.size() == 1) {
if (selection.getFirstElement() instanceof IJavaScriptUnit)
return true; // Do not force opening
final IType type= getSingleSelectedType(selection);
if (type != null)
return Checks.isAvailable(type) && isExtractSupertypeAvailable(new IType[] { type});
}
for (final Iterator iterator= selection.iterator(); iterator.hasNext();) {
if (!(iterator.next() instanceof IMember))
return false;
}
final Set members= new HashSet();
members.addAll(Arrays.asList(selection.toArray()));
return isExtractSupertypeAvailable((IMember[]) members.toArray(new IMember[members.size()]));
}
return false;
}
public static boolean isExtractSupertypeAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
IJavaScriptElement element= selection.resolveEnclosingElement();
if (!(element instanceof IMember))
return false;
return isExtractSupertypeAvailable(new IMember[] { (IMember) element});
}
public static boolean isExtractTempAvailable(final JavaTextSelection selection) {
final ASTNode[] nodes= selection.resolveSelectedNodes();
return (selection.resolveInMethodBody() || selection.resolveInClassInitializer()) && (Checks.isExtractableExpression(nodes, selection.resolveCoveringNode()) || (nodes != null && nodes.length == 1 && nodes[0] instanceof ExpressionStatement));
}
public static boolean isGeneralizeTypeAvailable(final IJavaScriptElement element) throws JavaScriptModelException {
if (element != null && element.exists()) {
String type= null;
if (element instanceof IFunction)
type= ((IFunction) element).getReturnType();
else if (element instanceof IField) {
final IField field= (IField) element;
type= field.getTypeSignature();
} else if (element instanceof ILocalVariable)
return true;
else if (element instanceof IType) {
return true;
}
if (type == null || PrimitiveType.toCode(Signature.toString(type)) != null)
return false;
return true;
}
return false;
}
public static boolean isGeneralizeTypeAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.size() == 1) {
final Object element= selection.getFirstElement();
if (element instanceof IFunction) {
final IFunction method= (IFunction) element;
if (!method.exists())
return false;
final String type= method.getReturnType();
if (PrimitiveType.toCode(Signature.toString(type)) == null)
return Checks.isAvailable(method);
} else if (element instanceof IField) {
final IField field= (IField) element;
if (!field.exists())
return false;
return Checks.isAvailable(field);
}
}
return false;
}
public static boolean isGeneralizeTypeAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement[] elements= selection.resolveElementAtOffset();
if (elements.length != 1)
return false;
return isGeneralizeTypeAvailable(elements[0]);
}
public static boolean isInferTypeArgumentsAvailable(final IJavaScriptElement element) throws JavaScriptModelException {
if (!Checks.isAvailable(element)) {
return false;
} else if (element instanceof IJavaScriptProject) {
IJavaScriptProject project= (IJavaScriptProject) element;
IIncludePathEntry[] classpathEntries= project.getRawIncludepath();
for (int i= 0; i < classpathEntries.length; i++) {
if (classpathEntries[i].getEntryKind() == IIncludePathEntry.CPE_SOURCE)
return true;
}
return false;
} else if (element instanceof IPackageFragmentRoot) {
return ((IPackageFragmentRoot) element).getKind() == IPackageFragmentRoot.K_SOURCE;
} else if (element instanceof IPackageFragment) {
return ((IPackageFragment) element).getKind() == IPackageFragmentRoot.K_SOURCE;
} else if (element instanceof IJavaScriptUnit) {
return true;
} else if (element.getAncestor(IJavaScriptElement.JAVASCRIPT_UNIT) != null) {
return true;
} else {
return false;
}
}
public static boolean isInferTypeArgumentsAvailable(final IJavaScriptElement[] elements) throws JavaScriptModelException {
if (elements.length == 0)
return false;
for (int i= 0; i < elements.length; i++) {
if (!(isInferTypeArgumentsAvailable(elements[i])))
return false;
}
return true;
}
public static boolean isInferTypeArgumentsAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.isEmpty())
return false;
for (Iterator iter= selection.iterator(); iter.hasNext();) {
Object element= iter.next();
if (!(element instanceof IJavaScriptElement))
return false;
if (element instanceof IJavaScriptUnit) {
IJavaScriptUnit unit= (IJavaScriptUnit) element;
if (!unit.exists() || unit.isReadOnly())
return false;
return true;
}
if (!isInferTypeArgumentsAvailable((IJavaScriptElement) element))
return false;
}
return true;
}
public static boolean isInlineConstantAvailable(final IField field) throws JavaScriptModelException {
return Checks.isAvailable(field) && JdtFlags.isStatic(field) && JdtFlags.isFinal(field);
}
public static boolean isInlineConstantAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.isEmpty() || selection.size() != 1)
return false;
final Object first= selection.getFirstElement();
return (first instanceof IField) && isInlineConstantAvailable(((IField) first));
}
public static boolean isInlineConstantAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement[] elements= selection.resolveElementAtOffset();
if (elements.length != 1)
return false;
return (elements[0] instanceof IField) && isInlineConstantAvailable(((IField) elements[0]));
}
public static boolean isInlineMethodAvailable(IFunction method) throws JavaScriptModelException {
if (method == null)
return false;
if (!method.exists())
return false;
if (!method.isStructureKnown())
return false;
if (!method.isBinary())
return true;
if (method.isConstructor())
return false;
return SourceRange.isAvailable(method.getNameRange());
}
public static boolean isInlineMethodAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.isEmpty() || selection.size() != 1)
return false;
final Object first= selection.getFirstElement();
return (first instanceof IFunction) && isInlineMethodAvailable(((IFunction) first));
}
public static boolean isInlineMethodAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement[] elements= selection.resolveElementAtOffset();
if (elements.length != 1)
return false;
IJavaScriptElement element= elements[0];
if (!(element instanceof IFunction))
return false;
IFunction method= (IFunction) element;
if (!isInlineMethodAvailable((method)))
return false;
// in binary class, only activate for method declarations
IJavaScriptElement enclosingElement= selection.resolveEnclosingElement();
if (enclosingElement == null || enclosingElement.getAncestor(IJavaScriptElement.CLASS_FILE) == null)
return true;
if (!(enclosingElement instanceof IFunction))
return false;
IFunction enclosingMethod= (IFunction) enclosingElement;
if (enclosingMethod.isConstructor())
return false;
int nameOffset= enclosingMethod.getNameRange().getOffset();
int nameLength= enclosingMethod.getNameRange().getLength();
return (nameOffset <= selection.getOffset()) && (selection.getOffset() + selection.getLength() <= nameOffset + nameLength);
}
public static boolean isInlineTempAvailable(final ILocalVariable variable) throws JavaScriptModelException {
return Checks.isAvailable(variable);
}
public static boolean isInlineTempAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement[] elements= selection.resolveElementAtOffset();
if (elements.length != 1)
return false;
return (elements[0] instanceof ILocalVariable) && isInlineTempAvailable((ILocalVariable) elements[0]);
}
public static boolean isIntroduceFactoryAvailable(final IFunction method) throws JavaScriptModelException {
return Checks.isAvailable(method) && method.isConstructor();
}
public static boolean isIntroduceFactoryAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.size() == 1 && selection.getFirstElement() instanceof IFunction)
return isIntroduceFactoryAvailable((IFunction) selection.getFirstElement());
return false;
}
public static boolean isIntroduceFactoryAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement[] elements= selection.resolveElementAtOffset();
if (elements.length == 1 && elements[0] instanceof IFunction)
return isIntroduceFactoryAvailable((IFunction) elements[0]);
// there's no IFunction for the default constructor
if (!Checks.isAvailable(selection.resolveEnclosingElement()))
return false;
ASTNode node= selection.resolveCoveringNode();
if (node == null) {
ASTNode[] selectedNodes= selection.resolveSelectedNodes();
if (selectedNodes != null && selectedNodes.length == 1) {
node= selectedNodes[0];
if (node == null)
return false;
} else {
return false;
}
}
if (node.getNodeType() == ASTNode.CLASS_INSTANCE_CREATION)
return true;
node= ASTNodes.getNormalizedNode(node);
if (node.getLocationInParent() == ClassInstanceCreation.TYPE_PROPERTY)
return true;
return false;
}
public static boolean isIntroduceIndirectionAvailable(IFunction method) throws JavaScriptModelException {
if (method == null)
return false;
if (!method.exists())
return false;
if (!method.isStructureKnown())
return false;
if (method.isConstructor())
return false;
return true;
}
public static boolean isIntroduceIndirectionAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.isEmpty() || selection.size() != 1)
return false;
final Object first= selection.getFirstElement();
return (first instanceof IFunction) && isIntroduceIndirectionAvailable(((IFunction) first));
}
public static boolean isIntroduceIndirectionAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement[] elements= selection.resolveElementAtOffset();
if (elements.length == 1)
return (elements[0] instanceof IFunction) && isIntroduceIndirectionAvailable(((IFunction) elements[0]));
ASTNode[] selectedNodes= selection.resolveSelectedNodes();
if (selectedNodes == null || selectedNodes.length != 1)
return false;
switch (selectedNodes[0].getNodeType()) {
case ASTNode.FUNCTION_DECLARATION:
case ASTNode.FUNCTION_INVOCATION:
case ASTNode.SUPER_METHOD_INVOCATION:
return true;
default:
return false;
}
}
public static boolean isIntroduceParameterAvailable(final ASTNode[] selectedNodes, ASTNode coveringNode) {
return Checks.isExtractableExpression(selectedNodes, coveringNode);
}
public static boolean isIntroduceParameterAvailable(final JavaTextSelection selection) {
return selection.resolveInMethodBody() && isIntroduceParameterAvailable(selection.resolveSelectedNodes(), selection.resolveCoveringNode());
}
public static boolean isMoveAvailable(final IResource[] resources, final IJavaScriptElement[] elements) throws JavaScriptModelException {
if (elements != null) {
for (int index= 0; index < elements.length; index++) {
IJavaScriptElement element= elements[index];
if (element == null || !element.exists())
return false;
if ((element instanceof IType) && ((IType) element).isLocal())
return false;
}
}
return ReorgPolicyFactory.createMovePolicy(resources, elements).canEnable();
}
public static boolean isMoveAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement element= selection.resolveEnclosingElement();
if (element == null)
return false;
return isMoveAvailable(new IResource[0], new IJavaScriptElement[] { element});
}
public static boolean isMoveInnerAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.size() == 1) {
Object first= selection.getFirstElement();
if (first instanceof IType) {
return isMoveInnerAvailable((IType) first);
}
}
return false;
}
public static boolean isMoveInnerAvailable(final IType type) throws JavaScriptModelException {
return Checks.isAvailable(type) && !Checks.isAnonymous(type) && !Checks.isTopLevel(type) && !Checks.isInsideLocalType(type);
}
public static boolean isMoveInnerAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
IType type= RefactoringAvailabilityTester.getDeclaringType(selection.resolveEnclosingElement());
if (type == null)
return false;
return isMoveInnerAvailable(type);
}
public static boolean isMoveMethodAvailable(final IFunction method) throws JavaScriptModelException {
return method.exists() && !method.isConstructor() && !method.isBinary() && !method.isReadOnly() && !JdtFlags.isStatic(method);
}
public static boolean isMoveMethodAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.size() == 1) {
final Object first= selection.getFirstElement();
return first instanceof IFunction && isMoveMethodAvailable((IFunction) first);
}
return false;
}
public static boolean isMoveMethodAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement method= selection.resolveEnclosingElement();
if (!(method instanceof IFunction))
return false;
return isMoveMethodAvailable((IFunction) method);
}
public static boolean isMoveStaticAvailable(final IMember member) throws JavaScriptModelException {
if (!member.exists())
return false;
final int type= member.getElementType();
if (type != IJavaScriptElement.METHOD && type != IJavaScriptElement.FIELD && type != IJavaScriptElement.TYPE)
return false;
final IType declaring= member.getDeclaringType();
if (declaring == null)
return false;
if (!Checks.isAvailable(member))
return false;
if (type == IJavaScriptElement.METHOD && !JdtFlags.isStatic(member))
return false;
if (type == IJavaScriptElement.METHOD && ((IFunction) member).isConstructor())
return false;
if (type == IJavaScriptElement.TYPE && !JdtFlags.isStatic(member))
return false;
if (!JdtFlags.isStatic(member))
return false;
return true;
}
public static boolean isMoveStaticAvailable(final IMember[] members) throws JavaScriptModelException {
for (int index= 0; index < members.length; index++) {
if (!isMoveStaticAvailable(members[index]))
return false;
}
return true;
}
public static boolean isMoveStaticAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement element= selection.resolveEnclosingElement();
if (!(element instanceof IMember))
return false;
return RefactoringAvailabilityTester.isMoveStaticMembersAvailable(new IMember[] { (IMember) element});
}
public static boolean isMoveStaticMembersAvailable(final IMember[] members) throws JavaScriptModelException {
if (members == null)
return false;
if (members.length == 0)
return false;
if (!isMoveStaticAvailable(members))
return false;
if (!isCommonDeclaringType(members))
return false;
return true;
}
public static boolean isPromoteTempAvailable(final ILocalVariable variable) throws JavaScriptModelException {
return Checks.isAvailable(variable);
}
public static boolean isPromoteTempAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement[] elements= selection.resolveElementAtOffset();
if (elements.length != 1)
return false;
return (elements[0] instanceof ILocalVariable) && isPromoteTempAvailable((ILocalVariable) elements[0]);
}
public static boolean isPullUpAvailable(IMember member) throws JavaScriptModelException {
if (!member.exists())
return false;
final int type= member.getElementType();
if (type != IJavaScriptElement.METHOD && type != IJavaScriptElement.FIELD && type != IJavaScriptElement.TYPE)
return false;
if (!Checks.isAvailable(member))
return false;
if (member instanceof IType) {
if (!JdtFlags.isStatic(member))
return false;
}
if (member instanceof IFunction) {
final IFunction method= (IFunction) member;
if (method.isConstructor())
return false;
}
return true;
}
public static boolean isPullUpAvailable(final IMember[] members) throws JavaScriptModelException {
if (members != null && members.length != 0) {
final IType type= getTopLevelType(members);
if (type != null && getPullUpMembers(type).length != 0)
return true;
for (int index= 0; index < members.length; index++) {
if (!isPullUpAvailable(members[index]))
return false;
}
return isCommonDeclaringType(members);
}
return false;
}
public static boolean isPullUpAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (!selection.isEmpty()) {
if (selection.size() == 1) {
if (selection.getFirstElement() instanceof IJavaScriptUnit)
return true; // Do not force opening
final IType type= getSingleSelectedType(selection);
if (type != null)
return Checks.isAvailable(type) && isPullUpAvailable(new IType[] { type});
}
for (final Iterator iterator= selection.iterator(); iterator.hasNext();) {
if (!(iterator.next() instanceof IMember))
return false;
}
final Set members= new HashSet();
members.addAll(Arrays.asList(selection.toArray()));
return isPullUpAvailable((IMember[]) members.toArray(new IMember[members.size()]));
}
return false;
}
public static boolean isPullUpAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
IJavaScriptElement element= selection.resolveEnclosingElement();
if (!(element instanceof IMember))
return false;
return isPullUpAvailable(new IMember[] { (IMember) element});
}
public static boolean isPushDownAvailable(final IMember member) throws JavaScriptModelException {
if (!member.exists())
return false;
final int type= member.getElementType();
if (type != IJavaScriptElement.METHOD && type != IJavaScriptElement.FIELD)
return false;
if (!Checks.isAvailable(member))
return false;
if (JdtFlags.isStatic(member))
return false;
if (type == IJavaScriptElement.METHOD) {
final IFunction method= (IFunction) member;
if (method.isConstructor())
return false;
}
return true;
}
public static boolean isPushDownAvailable(final IMember[] members) throws JavaScriptModelException {
if (members != null && members.length != 0) {
final IType type= getTopLevelType(members);
if (type != null && RefactoringAvailabilityTester.getPushDownMembers(type).length != 0)
return true;
for (int index= 0; index < members.length; index++) {
if (!isPushDownAvailable(members[index]))
return false;
}
return isCommonDeclaringType(members);
}
return false;
}
public static boolean isPushDownAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (!selection.isEmpty()) {
if (selection.size() == 1) {
if (selection.getFirstElement() instanceof IJavaScriptUnit)
return true; // Do not force opening
final IType type= getSingleSelectedType(selection);
if (type != null)
return isPushDownAvailable(new IType[] { type});
}
for (final Iterator iterator= selection.iterator(); iterator.hasNext();) {
if (!(iterator.next() instanceof IMember))
return false;
}
final Set members= new HashSet();
members.addAll(Arrays.asList(selection.toArray()));
return isPushDownAvailable((IMember[]) members.toArray(new IMember[members.size()]));
}
return false;
}
public static boolean isPushDownAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
IJavaScriptElement element= selection.resolveEnclosingElement();
if (!(element instanceof IMember))
return false;
return isPullUpAvailable(new IMember[] { (IMember) element});
}
public static boolean isRenameAvailable(final IJavaScriptUnit unit) {
if (unit == null)
return false;
if (!unit.exists())
return false;
if (!JavaModelUtil.isPrimary(unit))
return false;
if (unit.isReadOnly())
return false;
return true;
}
public static boolean isRenameAvailable(final IJavaScriptProject project) throws JavaScriptModelException {
if (project == null)
return false;
if (!Checks.isAvailable(project))
return false;
if (!project.isConsistent())
return false;
return true;
}
public static boolean isRenameAvailable(final ILocalVariable variable) throws JavaScriptModelException {
return Checks.isAvailable(variable);
}
public static boolean isRenameAvailable(final IFunction method) throws CoreException {
if (method == null)
return false;
if (!Checks.isAvailable(method))
return false;
if (method.isConstructor())
return false;
if (isRenameProhibited(method))
return false;
return true;
}
public static boolean isRenameAvailable(final IPackageFragment fragment) throws JavaScriptModelException {
if (fragment == null)
return false;
if (!Checks.isAvailable(fragment))
return false;
if (fragment.isDefaultPackage())
return false;
return true;
}
public static boolean isRenameAvailable(final IPackageFragmentRoot root) throws JavaScriptModelException {
if (root == null)
return false;
if (!Checks.isAvailable(root))
return false;
if (root.isArchive())
return false;
if (root.isExternal())
return false;
if (!root.isConsistent())
return false;
if (root.getResource() instanceof IProject)
return false;
return true;
}
public static boolean isRenameAvailable(final IResource resource) {
if (resource == null)
return false;
if (!resource.exists())
return false;
if (!resource.isAccessible())
return false;
return true;
}
public static boolean isRenameAvailable(final IType type) throws JavaScriptModelException {
if (type == null)
return false;
if (type.isAnonymous())
return false;
if (!Checks.isAvailable(type))
return false;
if (isRenameProhibited(type))
return false;
InferrenceProvider[] inferenceProviders = InferrenceManager.getInstance().getInferenceProviders( (IInferenceFile)type.getJavaScriptUnit());
if (inferenceProviders.length>0 && inferenceProviders[0].getRefactoringSupport()!=null)
{
RefactoringSupport refactoringSupport = inferenceProviders[0].getRefactoringSupport();
if (refactoringSupport!=null)
return refactoringSupport.supportsClassRename();
}
return false;
}
public static boolean isRenameFieldAvailable(final IField field) throws JavaScriptModelException {
return Checks.isAvailable(field);
}
public static boolean isRenameNonVirtualMethodAvailable(final IFunction method) throws JavaScriptModelException, CoreException {
return isRenameAvailable(method) && !MethodChecks.isVirtual(method);
}
public static boolean isRenameProhibited(final IFunction method) throws CoreException {
if (method.getElementName().equals("toString") //$NON-NLS-1$
&& (method.getNumberOfParameters() == 0) && (method.getReturnType().equals("Ljava.lang.String;") //$NON-NLS-1$
|| method.getReturnType().equals("QString;") //$NON-NLS-1$
|| method.getReturnType().equals("Qjava.lang.String;"))) //$NON-NLS-1$
return true;
else
return false;
}
public static boolean isRenameProhibited(final IType type) {
return type.getPackageFragment().getElementName().equals("java.lang"); //$NON-NLS-1$
}
public static boolean isRenameVirtualMethodAvailable(final IFunction method) throws CoreException {
return isRenameAvailable(method) && MethodChecks.isVirtual(method);
}
public static boolean isReplaceInvocationsAvailable(IFunction method) throws JavaScriptModelException {
if (method == null)
return false;
if (!method.exists())
return false;
if (method.isConstructor())
return false;
return true;
}
public static boolean isReplaceInvocationsAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.isEmpty() || selection.size() != 1)
return false;
final Object first= selection.getFirstElement();
return (first instanceof IFunction) && isReplaceInvocationsAvailable(((IFunction) first));
}
public static boolean isReplaceInvocationsAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement[] elements= selection.resolveElementAtOffset();
if (elements.length != 1)
return false;
IJavaScriptElement element= elements[0];
return (element instanceof IFunction) && isReplaceInvocationsAvailable(((IFunction) element));
}
public static boolean isSelfEncapsulateAvailable(IField field) throws JavaScriptModelException {
return Checks.isAvailable(field);
}
public static boolean isSelfEncapsulateAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.size() == 1) {
if (selection.getFirstElement() instanceof IField) {
final IField field= (IField) selection.getFirstElement();
return Checks.isAvailable(field);
}
}
return false;
}
public static boolean isSelfEncapsulateAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
final IJavaScriptElement[] elements= selection.resolveElementAtOffset();
if (elements.length != 1)
return false;
return (elements[0] instanceof IField) && isSelfEncapsulateAvailable((IField) elements[0]);
}
public static boolean isUseSuperTypeAvailable(final IStructuredSelection selection) throws JavaScriptModelException {
if (selection.size() == 1) {
final Object first= selection.getFirstElement();
if (first instanceof IType) {
return isUseSuperTypeAvailable((IType) first);
} else if (first instanceof IJavaScriptUnit) {
IJavaScriptUnit unit= (IJavaScriptUnit) first;
if (!unit.exists() || unit.isReadOnly())
return false;
return true;
}
}
return false;
}
public static boolean isUseSuperTypeAvailable(final IType type) throws JavaScriptModelException {
return type != null && type.exists();
}
public static boolean isUseSuperTypeAvailable(final JavaTextSelection selection) throws JavaScriptModelException {
return isUseSuperTypeAvailable(RefactoringActions.getEnclosingOrPrimaryType(selection));
}
public static boolean isWorkingCopyElement(final IJavaScriptElement element) {
if (element instanceof IJavaScriptUnit)
return ((IJavaScriptUnit) element).isWorkingCopy();
if (ReorgUtils.isInsideCompilationUnit(element))
return ReorgUtils.getCompilationUnit(element).isWorkingCopy();
return false;
}
private RefactoringAvailabilityTester() {
// Not for instantiation
}
}