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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.MethodVisitor;
import org.objectweb.asm.commons.EmptyVisitor;
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.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 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();
Iterator i = ignoredPackages.iterator();
while ( i.hasNext() )
{
String wildcard = (String) i.next();
this.ignoredPackages.add( RegexUtils.compileWildcard( wildcard.replace( '.', '/' )) );
}
this.logger = logger;
try
{
ObjectInputStream 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() );
}
}
protected void process( final String name, InputStream image )
throws IOException
{
ClassReader cr = new ClassReader( image );
final Set warned = new HashSet();
cr.accept( new EmptyVisitor()
{
public MethodVisitor visitMethod( int access, String name, String desc, String signature,
String[] exceptions )
{
return new EmptyVisitor()
{
/**
* 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.startsWith( "[" ) )
{
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.startsWith( "[" ) )
{
return true; // array
}
Iterator i = ignoredPackages.iterator();
while ( i.hasNext() )
{
Pattern pattern = (Pattern) i.next();
if ( pattern.matcher( type ).matches() )
{
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 );
}
}
}, 0 );
}
public boolean isSignatureBroken()
{
return hadError;
}
}
