/*
* Copyright 2009 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.jstestdriver;
import com.google.common.collect.Lists;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.google.inject.Inject;
import com.google.inject.name.Named;
import com.google.jstestdriver.model.HandlerPathPrefix;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Collection;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Parses failures.
* @author jeremiele@google.com (Jeremie Lenfant-Engelmann)
*/
public class FailureParser {
private static final Logger logger = LoggerFactory.getLogger(FailureParser.class);
private final Gson gson = new Gson();
private final HandlerPathPrefix pathPrefix;
@Inject
public FailureParser(@Named("serverHandlerPrefix") HandlerPathPrefix pathPrefix) {
this.pathPrefix = pathPrefix;
}
public List<Failure> parse(String failure) {
String message = "";
List<Failure> failures;
String stackStripPrefix = pathPrefix.prefixPath("/static/");
Pattern stackStripPattern = Pattern.compile("http://[^/]*/*" + stackStripPrefix,
Pattern.CASE_INSENSITIVE);
try {
Collection<JsException> exceptions =
gson.fromJson(failure, new TypeToken<Collection<JsException>>() {}.getType());
failures = Lists.newArrayListWithExpectedSize(exceptions.size());
for (JsException exception : exceptions) {
if (exception.getName() != null && !exception.getName().isEmpty()) {
message = String.format("%s: %s", exception.getName(), exception.getMessage());
} else {
message = exception.getMessage();
}
String errorStack = exception.getStack();
String[] lines = errorStack.split("\n");
final List<String> stack = Lists.newLinkedList();
for (String l : lines) {
if (!stackStripPattern.matcher(l).find()) {
stack.add(l);
}
}
failures.add(new Failure(message, stack));
}
} catch (Exception e) {
logger.error("Error converting JsExceptions[{}]", failure, e);
failures = Lists.newArrayList(new Failure(failure, Lists.<String>newArrayList()));
}
return failures;
}
public static class Failure {
private final List<String> stack;
private final String message;
public Failure(String message, List<String> stack) {
this.message = message;
this.stack = stack;
}
public String getMessage() {
return message;
}
public List<String> getStack() {
return stack;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((message == null) ? 0 : message.hashCode());
result = prime * result + ((stack == null) ? 0 : stack.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
Failure other = (Failure) obj;
if (message == null) {
if (other.message != null) return false;
} else if (!message.equals(other.message)) return false;
if (stack == null) {
if (other.stack != null) return false;
} else if (!stack.equals(other.stack)) return false;
return true;
}
@Override
public String toString() {
return "Failure [stack=" + stack + ", message=" + message + "]";
}
}
}