diff options
Diffstat (limited to 'eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/resources/CyclicDependencyValidator.java')
-rw-r--r-- | eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/resources/CyclicDependencyValidator.java | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/resources/CyclicDependencyValidator.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/resources/CyclicDependencyValidator.java new file mode 100644 index 000000000..a2b13c6a8 --- /dev/null +++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/resources/CyclicDependencyValidator.java @@ -0,0 +1,66 @@ +/* + * Copyright (C) 2011 The Android Open Source Project + * + * Licensed under the Eclipse Public License, Version 1.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.eclipse.org/org/documents/epl-v10.php + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package com.android.ide.eclipse.adt.internal.resources; + +import com.android.annotations.Nullable; +import com.android.ide.eclipse.adt.internal.editors.layout.gle2.IncludeFinder; + +import org.eclipse.core.resources.IFile; +import org.eclipse.core.resources.IProject; +import org.eclipse.jface.dialogs.IInputValidator; + +import java.util.Collection; + +/** A validator which checks for cyclic dependencies */ +public class CyclicDependencyValidator implements IInputValidator { + private final Collection<String> mInvalidIds; + + private CyclicDependencyValidator(Collection<String> invalid) { + this.mInvalidIds = invalid; + } + + @Override + public String isValid(String newText) { + if (mInvalidIds.contains(newText)) { + return "Cyclic include, not valid"; + } + return null; + } + + /** + * Creates a validator which ensures that the chosen id is not for a layout that is + * directly or indirectly including the given layout. Used to avoid cyclic + * dependencies when offering layouts to be included within a given file, etc. + * + * @param file the target file that candidate layouts should not directly or + * indirectly include + * @return a validator which checks whether resource ids are valid or whether they + * could result in a cyclic dependency + */ + @Nullable + public static IInputValidator create(@Nullable IFile file) { + if (file == null) { + return null; + } + + IProject project = file.getProject(); + IncludeFinder includeFinder = IncludeFinder.get(project); + final Collection<String> invalid = + includeFinder.getInvalidIncludes(file); + + return new CyclicDependencyValidator(invalid); + } +} |