code.lucamarrocco.hoptoad.Backtrace.java Source code

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Here is the source code for code.lucamarrocco.hoptoad.Backtrace.java

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// Modified or written by Luca Marrocco for inclusion with hoptoad.
// Copyright (c) 2009 Luca Marrocco.
// Licensed under the Apache License, Version 2.0 (the "License")

package code.lucamarrocco.hoptoad;

import static code.lucamarrocco.hoptoad.IsValidBacktrace.*;
import static org.hamcrest.Matchers.*;

import java.text.*;
import java.util.*;

public class Backtrace implements Iterable<String> {

    private final List<String> backtrace = new LinkedList<String>();

    private final List<String> ignoreRules = new LinkedList<String>();

    private final List<String> filteredBacktrace = new LinkedList<String>();

    protected Backtrace() {
    }

    public Backtrace(final List<String> backtrace) {
        this.backtrace.addAll(backtrace);
        ignore();
        filter();
    }

    public Backtrace(final Throwable throwable) {
        toBacktrace(throwable);
        ignore(".*" + messageIn(throwable) + ".*");
        ignore();
        filter();
    }

    private String causedBy(final Throwable throwable) {
        return MessageFormat.format("Caused by {0}", messageIn(throwable));
    }

    protected void filter() {
        filter(backtrace);
    }

    private final List<String> filter(final List<String> backtrace) {
        final ListIterator<String> iterator = backtrace.listIterator();
        while (iterator.hasNext()) {
            String string = iterator.next();
            if (mustBeIgnored(string)) {
                continue;
            }
            if (not(validBacktrace()).matches(string)) {
                string = removeDobuleDot(string);
            }
            filteredBacktrace.add(string);
        }

        return filteredBacktrace;
    }

    protected void ignore() {
        ignoreEmptyCause();
    }

    protected void ignore(final String ignoreRule) {
        ignoreRules.add(ignoreRule);
    }

    protected void ignoreCocoon() {
        ignore(".*org.apache.cocoon.components.expression.*");
        ignore(".*org.apache.cocoon.template.script.*");
        ignore(".*org.apache.cocoon.template.instruction.*");
        ignore(".*org.apache.cocoon.template.JXTemplateGenerator.*");
        ignore(".*org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.*");
        ignore(".*org.apache.cocoon.components.treeprocessor.*");
        ignore(".*org.apache.cocoon.environment.ForwardRedirector.*");
        ignore(".*org.apache.cocoon.components.flow.AbstractInterpreter.*");
        ignore(".*org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter.*");
        ignore(".*org.apache.cocoon.components.flow.javascript.fom.FOM_Cocoon.*");
        ignore(".*org.apache.commons.jexl.util.introspection.*");
        ignore(".*org.apache.commons.jexl.parser.ASTMethod.*");
        ignore(".*org.apache.commons.jexl.parser.ASTReference.*");
        ignore(".*org.apache.commons.jexl.ExpressionImpl.*");
        ignore(".*org.apache.cocoon.template.expression.*");
        ignore(".*org.apache.cocoon.Cocoon.*");
        ignore(".*org.apache.cocoon.servlet.*");
    }

    protected void ignoreEclipse() {
        ignore(".*org.eclipse.jdt.internal.junit4.runner.*");
        ignore(".*org.eclipse.jdt.internal.junit.runner.*");
    }

    private void ignoreEmptyCause() {
        ignore("^Caused by $");
    }

    protected void ignoreJunit() {
        ignore(".*.*org.junit.internal.runners.*");
    }

    protected void ignoreMortbayJetty() {
        ignore(".*org.mortbay.jetty.handler.ContextHandlerCollection.*");
        ignore(".*org.mortbay.jetty.handler.ContextHandler.*");
        ignore(".*org.mortbay.jetty.handler.HandlerCollection.*");
        ignore(".*org.mortbay.jetty.handler.HandlerWrapper.*");
        ignore(".*org.mortbay.jetty.HttpConnection.*");
        ignore(".*org.mortbay.jetty.HttpParser.*");
        ignore(".*org.mortbay.jetty.security.SecurityHandler.*");
        ignore(".*org.mortbay.jetty.Server.*");
        ignore(".*org.mortbay.jetty.servlet.ServletHandler.*");
        ignore(".*org.mortbay.jetty.servlet.ServletHolder.*");
        ignore(".*org.mortbay.jetty.servlet.SessionHandler.*");
        ignore(".*org.mortbay.jetty.webapp.WebAppContext.*");
        ignore(".*org.mortbay.io.nio.*");
        ignore(".*org.mortbay.thread.*");
    }

    protected void ignoreMozilla() {
        ignore(".*org.mozilla.javascript.FunctionObject.*");
        ignore(".*org.mozilla.javascript.ScriptRuntime.*");
        ignore(".*org.mozilla.javascript.continuations.*");
        ignore(".*org.mozilla.javascript.ScriptRuntime.*");
        ignore(".*org.mozilla.javascript.ScriptableObject.*");
        ignore(".*org.mozilla.javascript.FunctionObject.*");
    }

    protected void ignoreNoise() {
        ignore(".*inv1.invoke.*");
        ignore(".*javax.servlet.http.HttpServlet.*");
        ignore(".*sun.reflect.*");
        ignore(".*java.lang.reflect.Method.*");
    }

    protected void ignoreSpringSecurity() {
        ignore(".*org.springframework.security.context.HttpSessionContextIntegrationFilter.*");
        ignore(".*org.springframework.security.intercept.web.FilterSecurityInterceptor.*");
        ignore(".*org.springframework.security.providers.anonymous.AnonymousProcessingFilter.*");
        ignore(".*org.springframework.security.ui.AbstractProcessingFilter.*");
        ignore(".*org.springframework.security.ui.basicauth.BasicProcessingFilter.*");
        ignore(".*org.springframework.security.ui.ExceptionTranslationFilter.*");
        ignore(".*org.springframework.security.ui.logout.LogoutFilter.*");
        ignore(".*org.springframework.security.ui.rememberme.RememberMeProcessingFilter.*");
        ignore(".*org.springframework.security.ui.SessionFixationProtectionFilter.*");
        ignore(".*org.springframework.security.ui.SpringSecurityFilter.*");
        ignore(".*org.springframework.security.util.FilterChainProxy.*");
        ignore(".*org.springframework.security.wrapper.SecurityContextHolderAwareRequestFilter.*");
        ignore(".*org.springframework.web.filter.DelegatingFilterProxy.*");
    }

    public Iterator<String> iterator() {
        if (needToBeFiltered()) {
            filter(backtrace);
        }
        return filteredBacktrace.iterator();
    }

    private String messageIn(final Throwable throwable) {
        String message = throwable.getMessage();
        if (message == null) {
            message = throwable.getClass().getName();
        }
        return message;
    }

    private boolean mustBeIgnored(final String string) {
        for (final String ignore : ignoreRules) {
            if (string.matches(ignore))
                return true;
        }
        return false;
    }

    private boolean needToBeFiltered() {
        return filteredBacktrace.isEmpty();
    }

    public Backtrace newBacktrace(final Throwable throwable) {
        return new Backtrace(throwable);
    }

    private String removeDobuleDot(final String string) {
        return string.replaceAll(":", "");
    }

    private String toBacktrace(final StackTraceElement element) {
        return toBacktrace(element.getClassName(), element.getFileName(), element.getLineNumber(),
                element.getMethodName());
    }

    protected String toBacktrace(final String className, final String fileName, final int lineNumber,
            final String methodName) {
        return new BacktraceLine(className, fileName, lineNumber, methodName).toString();
    }

    private void toBacktrace(final Throwable throwable) {
        if (throwable == null)
            return;

        backtrace.add(causedBy(throwable));
        for (final StackTraceElement element : throwable.getStackTrace()) {
            backtrace.add(toBacktrace(element));
        }

        toBacktrace(throwable.getCause());
    }

    @Override
    public String toString() {
        final StringBuilder stringBuilder = new StringBuilder();
        for (final String string : filteredBacktrace) {
            stringBuilder.append(string).append("\n");
        }
        return stringBuilder.toString();
    }
}