org.codehaus.mojo.animal_sniffer.SignatureChecker Maven / Gradle / Ivy
package org.codehaus.mojo.animal_sniffer;
/*
* The MIT License
*
* Copyright (c) 2008 Kohsuke Kawaguchi and codehaus.org.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
import org.codehaus.mojo.animal_sniffer.logging.Logger;
import org.codehaus.mojo.animal_sniffer.logging.PrintWriterLogger;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
import java.util.zip.GZIPInputStream;
/**
* Checks the signature against classes in this list.
*
* @author Kohsuke Kawaguchi
*/
public class SignatureChecker
extends ClassFileVisitor
{
private final Map/**/ classes = new HashMap();
private final Logger logger;
/**
* Classes in this packages are considered to be resolved elsewhere and
* thus not a subject of the error checking when referenced.
*/
private final List ignoredPackageRules;
private final Set ignoredPackages;
private boolean hadError = false;
public static void main( String[] args )
throws Exception
{
Set ignoredPackages = new HashSet();
ignoredPackages.add( "org.jvnet.animal_sniffer.*" );
ignoredPackages.add( "org.codehaus.mojo.animal_sniffer.*" );
ignoredPackages.add( "org.objectweb.*" );
new SignatureChecker( new FileInputStream( "signature" ), ignoredPackages,
new PrintWriterLogger( System.out ) ).process( new File( "target/classes" ) );
}
public SignatureChecker( InputStream in, Set ignoredPackages, Logger logger )
throws IOException
{
this.ignoredPackages = new HashSet();
this.ignoredPackageRules = new LinkedList();
Iterator i = ignoredPackages.iterator();
while ( i.hasNext() )
{
String wildcard = (String) i.next();
if ( wildcard.indexOf( '*' ) == -1 && wildcard.indexOf( '?' ) == -1 )
{
this.ignoredPackages.add( wildcard.replace( '.', '/' ) );
}
else
{
this.ignoredPackageRules.add( newMatchRule( wildcard.replace( '.', '/' ) ) );
}
}
this.logger = logger;
ObjectInputStream ois = null;
try
{
ois = new ObjectInputStream( new GZIPInputStream( in ) );
while ( true )
{
Clazz c = (Clazz) ois.readObject();
if ( c == null )
{
return; // finished
}
classes.put( c.getName(), c );
}
}
catch ( ClassNotFoundException e )
{
throw new NoClassDefFoundError( e.getMessage() );
}
finally
{
if ( ois != null )
{
try
{
ois.close();
}
catch ( IOException e )
{
// ignore
}
}
}
}
protected void process( final String name, InputStream image )
throws IOException
{
ClassReader cr = new ClassReader( image );
try
{
cr.accept( new CheckingVisitor( name ), 0 );
}
catch ( ArrayIndexOutOfBoundsException e )
{
logger.error( "Bad class file " + name );
// MANIMALSNIFFER-9 it is a pity that ASM does not throw a nicer error on encountering a malformed
// class file.
IOException ioException = new IOException( "Bad class file " + name );
ioException.initCause( e );
throw ioException;
}
}
private static interface MatchRule
{
boolean matches( String text );
}
private static class PrefixMatchRule
implements SignatureChecker.MatchRule
{
private final String prefix;
public PrefixMatchRule( String prefix )
{
this.prefix = prefix;
}
public boolean matches( String text )
{
return text.startsWith( prefix );
}
}
private static class ExactMatchRule
implements SignatureChecker.MatchRule
{
private final String match;
public ExactMatchRule( String match )
{
this.match = match;
}
public boolean matches( String text )
{
return match.equals( text );
}
}
private static class RegexMatchRule
implements SignatureChecker.MatchRule
{
private final Pattern regex;
public RegexMatchRule( Pattern regex )
{
this.regex = regex;
}
public boolean matches( String text )
{
return regex.matcher( text ).matches();
}
}
private SignatureChecker.MatchRule newMatchRule( String matcher )
{
int i = matcher.indexOf( '*' );
if ( i == -1 )
{
return new ExactMatchRule( matcher );
}
if ( i == matcher.length() - 1 )
{
return new PrefixMatchRule( matcher.substring( 0, i ) );
}
return new RegexMatchRule( RegexUtils.compileWildcard( matcher ) );
}
public boolean isSignatureBroken()
{
return hadError;
}
private class CheckingVisitor
extends ClassVisitor
{
private final Set ignoredPackageCache;
private final Set warned;
private final String name;
public CheckingVisitor( String name )
{
super(Opcodes.ASM4);
this.ignoredPackageCache = new HashSet( 50 * ignoredPackageRules.size() );
this.warned = new HashSet();
this.name = name;
}
public MethodVisitor visitMethod( int access, String name, String desc, String signature, String[] exceptions )
{
return new MethodVisitor(Opcodes.ASM4)
{
/**
* True if @IgnoreJRERequirement is set.
*/
boolean ignoreError = false;
public AnnotationVisitor visitAnnotation( String desc, boolean visible )
{
if ( desc.equals( "Lorg/jvnet/animal_sniffer/IgnoreJRERequirement;" ) )
{
ignoreError = true;
}
if ( desc.equals( "Lorg/codehaus/mojo/animal_sniffer/IgnoreJRERequirement;" ) )
{
ignoreError = true;
}
return super.visitAnnotation( desc, visible );
}
public void visitMethodInsn( int opcode, String owner, String name, String desc )
{
check( owner, name + desc );
}
public void visitTypeInsn( int opcode, String type )
{
if ( shouldBeIgnored( type ) )
{
return;
}
if ( type.charAt( 0 ) == '[' )
{
return; // array
}
Clazz sigs = (Clazz) classes.get( type );
if ( sigs == null )
{
error( "Undefined reference: " + type );
}
}
public void visitFieldInsn( int opcode, String owner, String name, String desc )
{
check( owner, name + '#' + desc );
}
private void check( String owner, String sig )
{
if ( shouldBeIgnored( owner ) )
{
return;
}
if ( find( (Clazz) classes.get( owner ), sig ) )
{
return; // found it
}
error( "Undefined reference: " + owner + '.' + sig );
}
private boolean shouldBeIgnored( String type )
{
if ( ignoreError )
{
return true; // warning suppressed in this context
}
if ( type.charAt( 0 ) == '[' )
{
return true; // array
}
if ( ignoredPackages.contains( type ) || ignoredPackageCache.contains( type ) )
{
return true;
}
Iterator i = ignoredPackageRules.iterator();
while ( i.hasNext() )
{
MatchRule rule = (MatchRule) i.next();
if ( rule.matches( type ) )
{
ignoredPackageCache.add( type );
return true;
}
}
return false;
}
};
}
/**
* If the given signature is found in the specified class, return true.
*/
private boolean find( Clazz c, String sig )
{
if ( c == null )
{
return false;
}
if ( c.getSignatures().contains( sig ) )
{
return true;
}
if ( sig.startsWith( "<" ) )
// constructor and static initializer shouldn't go up the inheritance hierarchy
{
return false;
}
if ( find( (Clazz) classes.get( c.getSuperClass() ), sig ) )
{
return true;
}
if ( c.getSuperInterfaces() != null )
{
for ( int i = 0; i < c.getSuperInterfaces().length; i++ )
{
if ( find( (Clazz) classes.get( c.getSuperInterfaces()[i] ), sig ) )
{
return true;
}
}
}
return false;
}
private void error( String msg )
{
hadError = true;
if ( warned.add( msg ) )
{
logger.error( msg + " in " + name );
}
}
}
}
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