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Diffstat (limited to 'dx/src/com/android/dx/rop/annotation/AnnotationsList.java')
-rw-r--r-- | dx/src/com/android/dx/rop/annotation/AnnotationsList.java | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/dx/src/com/android/dx/rop/annotation/AnnotationsList.java b/dx/src/com/android/dx/rop/annotation/AnnotationsList.java new file mode 100644 index 0000000..b97b385 --- /dev/null +++ b/dx/src/com/android/dx/rop/annotation/AnnotationsList.java @@ -0,0 +1,91 @@ +/* + * Copyright (C) 2007 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 + * + * 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.dx.rop.annotation; + +import com.android.dx.util.FixedSizeList; + +/** + * List of {@link Annotations} instances. + */ +public final class AnnotationsList + extends FixedSizeList { + /** {@code non-null;} immutable empty instance */ + public static final AnnotationsList EMPTY = new AnnotationsList(0); + + /** + * Constructs an immutable instance which is the combination of + * the two given instances. The two instances must each have the + * same number of elements, and each pair of elements must contain + * disjoint sets of types. + * + * @param list1 {@code non-null;} an instance + * @param list2 {@code non-null;} the other instance + * @return {@code non-null;} the combination + */ + public static AnnotationsList combine(AnnotationsList list1, + AnnotationsList list2) { + int size = list1.size(); + + if (size != list2.size()) { + throw new IllegalArgumentException("list1.size() != list2.size()"); + } + + AnnotationsList result = new AnnotationsList(size); + + for (int i = 0; i < size; i++) { + Annotations a1 = list1.get(i); + Annotations a2 = list2.get(i); + result.set(i, Annotations.combine(a1, a2)); + } + + result.setImmutable(); + return result; + } + + /** + * Constructs an instance. All indices initially contain {@code null}. + * + * @param size the size of the list + */ + public AnnotationsList(int size) { + super(size); + } + + /** + * Gets the element at the given index. It is an error to call + * this with the index for an element which was never set; if you + * do that, this will throw {@code NullPointerException}. + * + * @param n {@code >= 0, < size();} which index + * @return {@code non-null;} element at that index + */ + public Annotations get(int n) { + return (Annotations) get0(n); + } + + /** + * Sets the element at the given index. The given element must be + * immutable. + * + * @param n {@code >= 0, < size();} which index + * @param a {@code null-ok;} the element to set at {@code n} + */ + public void set(int n, Annotations a) { + a.throwIfMutable(); + set0(n, a); + } +} |