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/*******************************************************************************
* Copyright (c) 2010 Oracle. 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:
* Oracle - initial API and implementation
*******************************************************************************/
package org.eclipse.jpt.common.core.internal.utility.jdt;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jpt.common.core.JptCommonCorePlugin;
import org.eclipse.jpt.utility.Filter;
import org.eclipse.jpt.utility.internal.CollectionTools;
import org.eclipse.jpt.utility.internal.iterables.ArrayIterable;
import org.eclipse.jpt.utility.internal.iterables.EmptyIterable;
import org.eclipse.jpt.utility.internal.iterables.FilteringIterable;
/**
* Convenience methods for dealing with JDT core
*/
public final class JDTTools
{
public static boolean packageFragmentRootIsSourceFolder(IPackageFragmentRoot pfr) {
try {
return packageFragmentRootIsSourceFolder_(pfr);
} catch (JavaModelException ex) {
JptCommonCorePlugin.log(ex);
return false;
}
}
protected static boolean packageFragmentRootIsSourceFolder_(IPackageFragmentRoot pfr) throws JavaModelException {
return pfr.exists() && (pfr.getKind() == IPackageFragmentRoot.K_SOURCE);
}
public static IJavaElement[] getJDTChildren(IPackageFragmentRoot root) {
try {
return getJDTChildren_(root);
} catch (JavaModelException ex) {
// ignore FNFE - which can happen when the workspace is out of synch with O/S file system
if ( ! (ex.getCause() instanceof FileNotFoundException)) {
JptCommonCorePlugin.log(ex);
}
return EMPTY_JAVA_ELEMENT_ARRAY;
}
}
private static IJavaElement[] getJDTChildren_(IPackageFragmentRoot root) throws JavaModelException {
return root.getChildren();
}
private static final IJavaElement[] EMPTY_JAVA_ELEMENT_ARRAY = new IJavaElement[0];
public static boolean typeNamedImplementsInterfaceNamed(IJavaProject javaProject, String typeName, String interfaceNamed) {
try {
return typeImplementsInterface(javaProject, javaProject.findType(typeName), javaProject.findType(interfaceNamed));
}
catch (JavaModelException ex) {
JptCommonCorePlugin.log(ex);
return false;
}
}
public static boolean typeImplementsInterface(IJavaProject javaProject, IType type, IType interfase) {
try {
if (type == null || interfase == null) {
return false;
}
Iterable<String> resolvedSuperInterfaceNames = resolveSuperInterfaceNames(type);
if (CollectionTools.contains(resolvedSuperInterfaceNames, interfase.getFullyQualifiedName())) {
return true;
}
for (String interfaceName : resolveSuperInterfaceNames(type)) {
IType superInterface = javaProject.findType(interfaceName);
if (superInterface != null && typeImplementsInterface(javaProject, superInterface, interfase)) {
return true;
}
}
if (type.getSuperclassName() == null) {
return false;
}
return typeImplementsInterface(javaProject, getJDTSuperclass(javaProject, type), interfase);
}
catch (JavaModelException ex) {
return false;
}
}
/**
* This is necessary because for whatever reason getSuperClassName() on IType returns unqualified names
* when the type is java sourced.
* @param type
* @return String - resolved super class name or null
*/
private static String resolveSuperClassName(final IType type) {
try {
if (!type.isBinary()) {
String superClassName = type.getSuperclassName();
String[][] resolvedSuperClassName = type.resolveType(superClassName);
return resolvedSuperClassName[0][0] + "." + resolvedSuperClassName[0][1]; //$NON-NLS-1$
}
return type.getSuperclassName();
} catch (JavaModelException ex) {
JptCommonCorePlugin.log(ex);
return null;
}
}
/**
* This is necessary because for whatever reason getSuperInterfaceNames() on IType returns unqualified names
* when the type is java sourced.
* @param type
* @return Iterable<String> - resolved super interface names
*/
private static Iterable<String> resolveSuperInterfaceNames(final IType type) {
try {
if (!type.isBinary()) {
ArrayList<String> resolvedSuperInterfaceNames = new ArrayList<String>();
for (String superInterfaceName : new ArrayIterable<String>(type.getSuperInterfaceNames())) {
String[][] resolvedTypeNames = type.resolveType(superInterfaceName);
for (String[] resolvedTypeName : resolvedTypeNames) {
resolvedSuperInterfaceNames.add(resolvedTypeName[0] + "." + resolvedTypeName[1]); //$NON-NLS-1$
}
}
return resolvedSuperInterfaceNames;
}
return new ArrayIterable<String>(type.getSuperInterfaceNames());
}
catch (JavaModelException ex) {
JptCommonCorePlugin.log(ex);
return EmptyIterable.instance();
}
}
public static IType getJDTType(IJavaProject javaProject, String fullyQualifiedName) {
try {
return javaProject.findType(fullyQualifiedName);
}
catch (JavaModelException ex) {
JptCommonCorePlugin.log(ex);
return null;
}
}
public static IType getJDTSuperclass(IJavaProject javaProject, IType child) {
try {
return javaProject.findType(resolveSuperClassName(child));
}
catch (JavaModelException ex) {
JptCommonCorePlugin.log(ex);
return null;
}
}
public static Iterable<IType> getJDTSuperInterfaces(IJavaProject javaProject, IType child) {
ArrayList<IType> superclassInterfaces = new ArrayList<IType>();
try {
Iterable<String> superInterfaceNameIterable = resolveSuperInterfaceNames(child);
for (String superInterfaceName : superInterfaceNameIterable) {
superclassInterfaces.add(javaProject.findType(superInterfaceName));
}
}
catch (JavaModelException ex) {
JptCommonCorePlugin.log(ex);
return EmptyIterable.instance();
}
return superclassInterfaces;
}
public static Iterable<IPackageFragmentRoot> getJavaSourceFolders(IJavaProject javaProject) {
try {
return new FilteringIterable<IPackageFragmentRoot>(
getPackageFragmentRoots(javaProject),
SOURCE_PACKAGE_FRAGMENT_ROOT_FILTER);
}
catch (JavaModelException ex) {
JptCommonCorePlugin.log(ex);
return EmptyIterable.instance();
}
}
/**
* This returns the first package fragment root found on this project.
* I am not completely sure why, but the JavaTypeCompletionProcessor works with this.
*/
//TODO move this method to JpaProject once API freeze is over
public static IPackageFragmentRoot getCodeCompletionContextRoot(IJavaProject javaProject) {
try {
return javaProject.getPackageFragmentRoots()[0];
}
catch (JavaModelException e) {
JptCommonCorePlugin.log(e);
return null;
}
}
protected static Iterable<IPackageFragmentRoot> getJavaSourceFolders_(IJavaProject javaProject) throws JavaModelException {
return new FilteringIterable<IPackageFragmentRoot>(
getPackageFragmentRoots(javaProject),
SOURCE_PACKAGE_FRAGMENT_ROOT_FILTER
);
}
protected static final Filter<IPackageFragmentRoot> SOURCE_PACKAGE_FRAGMENT_ROOT_FILTER =
new Filter<IPackageFragmentRoot>() {
public boolean accept(IPackageFragmentRoot pfr) {
try {
return this.accept_(pfr);
} catch (JavaModelException ex) {
return false;
}
}
private boolean accept_(IPackageFragmentRoot pfr) throws JavaModelException {
return packageFragmentRootIsSourceFolder_(pfr);
}
};
protected static Iterable<IPackageFragmentRoot> getPackageFragmentRoots(IJavaProject javaProject) throws JavaModelException {
return new ArrayIterable<IPackageFragmentRoot>(javaProject.getPackageFragmentRoots());
}
}
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