| /* |
| * Copyright 2008 Google Inc. |
| * |
| * 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.google.gwt.core.ext.soyc; |
| |
| import java.util.Comparator; |
| |
| /** |
| * Represents a contiguous region of characters in the compiler output. |
| */ |
| public final class Range { |
| /** |
| * Sorts Ranges so that a Range will be preceeded by any Ranges that enclose |
| * it. |
| */ |
| public static final Comparator<Range> DEPENDENCY_ORDER_COMPARATOR = new Comparator<Range>() { |
| public int compare(Range o1, Range o2) { |
| int a = o1.start - o2.start; |
| if (a != 0) { |
| return a; |
| } |
| |
| return o2.end - o1.end; |
| } |
| }; |
| |
| /** |
| * Sorts Ranges into the order in which they would appear in the source code |
| * based on start position and end position. |
| */ |
| public static final Comparator<Range> SOURCE_ORDER_COMPARATOR = new Comparator<Range>() { |
| public int compare(Range o1, Range o2) { |
| int a = o1.start - o2.start; |
| if (a != 0) { |
| return a; |
| } |
| |
| return o1.end - o2.end; |
| } |
| }; |
| |
| final int end; |
| final int start; |
| |
| /** |
| * Constructor. |
| * |
| * @param start must be non-negative |
| * @param end must be greater than or equal to <code>start</code> |
| */ |
| public Range(int start, int end) { |
| assert start >= 0; |
| assert start <= end; |
| this.start = start; |
| this.end = end; |
| } |
| |
| /** |
| * Return <code>true</code> if the given Range lies wholly within the Range. |
| */ |
| public boolean contains(Range o) { |
| return start <= o.start && o.end <= end; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof Range)) { |
| return false; |
| } |
| Range o = (Range) obj; |
| return start == o.start && end == o.end; |
| } |
| |
| public int getEnd() { |
| return end; |
| } |
| |
| public int getStart() { |
| return start; |
| } |
| |
| @Override |
| public int hashCode() { |
| return 37 * start + end; |
| } |
| |
| public int length() { |
| return end - start; |
| } |
| |
| /** |
| * For debugging use only. |
| */ |
| @Override |
| public String toString() { |
| return "[" + start + " - " + end + ")"; |
| } |
| } |