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/*
* Copyright (C) 2013 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.jack.shrob;
import com.android.jack.DifferenceFoundException;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.annotation.CheckForNull;
import javax.annotation.Nonnull;
/**
* This tool compares two list of types and their members.
*/
public class ListingComparator extends AbstractListingComparator {
public static void compare(@Nonnull File reference, @Nonnull File candidate)
throws IOException, DifferenceFoundException {
new ListingComparator().compareReadables(new FileReadable(reference),
new FileReadable(candidate));
}
public static void compare(@Nonnull File reference, @Nonnull String candidate)
throws IOException, DifferenceFoundException {
new ListingComparator().compareReadables(new FileReadable(reference),
new StringReadable(candidate));
}
private void compareReadables(@Nonnull Readable reference, @Nonnull Readable candidate)
throws IOException, DifferenceFoundException {
List<String> candidateTypesList;
{
BufferedReader candidateReader = candidate.openReader();
try {
candidateTypesList = getTypeList(candidateReader);
} finally {
candidateReader.close();
}
}
BufferedReader referenceReader = reference.openReader();
try {
String currentReferenceLine = referenceReader.readLine();
while (currentReferenceLine != null) {
if (!isTypeLine(currentReferenceLine)) {
throw new ParseException("Type expected");
}
String currentType = getTypeNameFromLine(currentReferenceLine);
int typeIndex = candidateTypesList.indexOf(currentReferenceLine);
if (typeIndex != -1) {
candidateTypesList.remove(currentReferenceLine);
BufferedReader candidateReader = candidate.openReader();
try {
if (findLine(currentReferenceLine, candidateReader)) {
currentReferenceLine = checkMembers(referenceReader, candidateReader, currentType);
} else {
throw new AssertionError();
}
} finally {
candidateReader.close();
}
} else {
missingType(currentType, false /* missingInReference */);
// Skip members
do {
currentReferenceLine = referenceReader.readLine();
} while (currentReferenceLine != null && !isTypeLine(currentReferenceLine));
}
}
} finally {
referenceReader.close();
}
if (!candidateTypesList.isEmpty()) {
Iterator<String> iterator = candidateTypesList.iterator();
while (iterator.hasNext()) {
missingType(getTypeNameFromLine(iterator.next()), true /* missingInReference */);
}
}
if (differenceFound()) {
throw new DifferenceFoundException();
}
}
@Nonnull
private static List<String> getTypeList(@Nonnull BufferedReader reader) throws IOException {
List<String> typesFound = new ArrayList<String>();
String line = reader.readLine();
while (line != null) {
if (isTypeLine(line)) {
typesFound.add(line);
}
line = reader.readLine();
}
return typesFound;
}
@CheckForNull
private String checkMembers(@Nonnull BufferedReader referenceReader,
@Nonnull BufferedReader candidateReader, @Nonnull String currentType)
throws IOException {
List<String> candidateMembers = getMemberList(candidateReader);
String currentReferenceLine = referenceReader.readLine();
while (currentReferenceLine != null && !isTypeLine(currentReferenceLine)) {
int index = candidateMembers.indexOf(currentReferenceLine);
if (index == -1) {
missingMember(currentReferenceLine, currentType, false /* missingInReference*/);
} else {
candidateMembers.remove(index);
}
currentReferenceLine = referenceReader.readLine();
}
if (!candidateMembers.isEmpty()) {
Iterator<String> iterator = candidateMembers.iterator();
while (iterator.hasNext()) {
missingMember(iterator.next(), currentType, true /* missingInReference*/);
}
}
return currentReferenceLine;
}
@Nonnull
private static List<String> getMemberList(@Nonnull BufferedReader referenceReader)
throws IOException {
String line = referenceReader.readLine();
List<String> referenceMembers = new ArrayList<String>();
while (line != null && !isTypeLine(line)) {
referenceMembers.add(line);
line = referenceReader.readLine();
}
return referenceMembers;
}
private static boolean isTypeLine(@Nonnull String line) {
return line.endsWith(":");
}
@Nonnull
private static String getTypeNameFromLine(@Nonnull String line) {
assert isTypeLine(line);
return line.substring(0, line.length() - 1);
}
public static void main(String[] args) throws IOException, DifferenceFoundException {
if (args.length != 2) {
System.out.println("Wrong number of arguments: expecting <referenceFile> <candidateFile>");
} else {
File reference = new File(args[0]);
File candidate = new File(args[1]);
compare(reference, candidate);
}
}
}
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