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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 java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.nio.CharBuffer;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.zip.GZIPInputStream;
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.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
/**
* Checks the signature against classes in this list.
*
* @author Kohsuke Kawaguchi
*/
public class SignatureChecker
extends ClassFileVisitor
{
/**
* The fully qualified name of the annotation to use to annotate methods/fields/classes that are
* to be ignored by animal sniffer.
*/
public static final String ANNOTATION_FQN = "org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement";
/**
* Similar to {@link #ANNOTATION_FQN}. Kept for backward compatibility reasons
*/
public static final String PREVIOUS_ANNOTATION_FQN = "org.jvnet.animal_sniffer.IgnoreJRERequirement";
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 final Set ignoredOuterClassesOrMethods = new HashSet();
private boolean hadError = false;
private List sourcePath;
private Collection annotationDescriptors;
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();
for(String wildcard : ignoredPackages )
{
if ( wildcard.indexOf( '*' ) == -1 && wildcard.indexOf( '?' ) == -1 )
{
this.ignoredPackages.add( wildcard.replace( '.', '/' ) );
}
else
{
this.ignoredPackageRules.add( newMatchRule( wildcard.replace( '.', '/' ) ) );
}
}
this.annotationDescriptors = new HashSet();
this.annotationDescriptors.add( toAnnotationDescriptor( ANNOTATION_FQN ) );
this.annotationDescriptors.add( toAnnotationDescriptor( PREVIOUS_ANNOTATION_FQN ) );
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
}
}
}
}
/** @since 1.9 */
public void setSourcePath( List sourcePath )
{
this.sourcePath = sourcePath;
}
/**
* Sets the annotation type(s) that this checker should consider to ignore annotated
* methods, classes or fields.
*
* By default, the {@link #ANNOTATION_FQN} and {@link #PREVIOUS_ANNOTATION_FQN} are
* used.
*
* If you want to add an extra annotation types, make sure to add
* the standard one to the specified lists.
*
* @param annotationTypes a list of the fully qualified name of the annotation types
* to consider for ignoring annotated method, class and field
* @since 1.11
*/
public void setAnnotationTypes( Collection annotationTypes )
{
this.annotationDescriptors.clear();
for ( String annotationType : annotationTypes )
{
annotationDescriptors.add( toAnnotationDescriptor( annotationType ) );
}
}
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 String packagePrefix;
private int line;
private String name;
private String internalName;
private boolean ignoreClass = false;
public CheckingVisitor( String name )
{
super(Opcodes.ASM5);
this.ignoredPackageCache = new HashSet( 50 * ignoredPackageRules.size() );
this.name = name;
}
@Override
public void visit( int version, int access, String name, String signature, String superName, String[] interfaces )
{
internalName = name;
packagePrefix = name.substring(0, name.lastIndexOf( '/' ) + 1 );
}
@Override
public void visitSource( String source, String debug )
{
for ( File root : sourcePath )
{
File s = new File( root, packagePrefix + source );
if ( s.isFile() )
{
name = s.getAbsolutePath();
}
}
}
@Override
public void visitOuterClass( String owner, String name, String desc )
{
if ( ignoredOuterClassesOrMethods.contains( owner ) ||
( name != null && ignoredOuterClassesOrMethods.contains ( owner + "#" + name + desc ) ) )
{
ignoreClass = true;
}
}
public boolean isIgnoreAnnotation(String desc)
{
for ( String annoDesc : annotationDescriptors )
{
if ( desc.equals( annoDesc ) )
{
return true;
}
}
return false;
}
@Override
public AnnotationVisitor visitAnnotation(String desc, boolean visible)
{
if ( isIgnoreAnnotation( desc ) )
{
ignoreClass = true;
ignoredOuterClassesOrMethods.add( internalName );
}
return super.visitAnnotation(desc, visible);
}
@Override
public MethodVisitor visitMethod( int access, final String name, final String desc, String signature, String[] exceptions )
{
return new MethodVisitor(Opcodes.ASM5)
{
/**
* True if @IgnoreJRERequirement is set.
*/
boolean ignoreError = ignoreClass;
@Override
public AnnotationVisitor visitAnnotation( String annoDesc, boolean visible )
{
if ( isIgnoreAnnotation(annoDesc) )
{
ignoreError = true;
ignoredOuterClassesOrMethods.add( internalName + "#" + name + desc );
}
return super.visitAnnotation( annoDesc, visible );
}
@Override
public void visitMethodInsn( int opcode, String owner, String name, String desc, boolean itf )
{
check( owner, name + desc );
}
@Override
public void visitTypeInsn( int opcode, String type )
{
if ( shouldBeIgnored( type ) )
{
return;
}
if ( type.charAt( 0 ) == '[' )
{
return; // array
}
Clazz sigs = classes.get( type );
if ( sigs == null )
{
error( type, null );
}
}
@Override
public void visitFieldInsn( int opcode, String owner, String name, String desc )
{
check( owner, name + '#' + desc );
}
@Override
public void visitLineNumber( int line, Label start )
{
CheckingVisitor.this.line = line;
}
private void check( String owner, String sig )
{
if ( shouldBeIgnored( owner ) )
{
return;
}
if ( find( classes.get( owner ), sig, true ) )
{
return; // found it
}
error( 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;
}
for ( MatchRule rule : ignoredPackageRules )
{
if ( rule.matches( type ) )
{
ignoredPackageCache.add( type );
return true;
}
}
return false;
}
};
}
/**
* If the given signature is found in the specified class, return true.
* @param baseFind TODO
*/
private boolean find( Clazz c , String sig , boolean baseFind )
{
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, false ) )
{
return true;
}
if ( c.getSuperInterfaces() != null )
{
for ( int i = 0; i < c.getSuperInterfaces().length; i++ )
{
if ( find( classes.get( c.getSuperInterfaces()[i] ), sig, false ) )
{
return true;
}
}
}
// This is a rare case and quite expensive, so moving it to the end of this method and only execute it from
// first find-call.
if ( baseFind )
{
// MANIMALSNIFFER-49
Pattern returnTypePattern = Pattern.compile( "(.+\\))L(.+);" );
Matcher returnTypeMatcher = returnTypePattern.matcher( sig );
if ( returnTypeMatcher.matches() )
{
String method = returnTypeMatcher.group( 1 );
String returnType = returnTypeMatcher.group( 2 );
Clazz returnClass = classes.get( returnType );
if ( returnClass.getSuperClass() != null )
{
String oldSignature = method + 'L' + returnClass.getSuperClass() + ';';
if ( find( c, oldSignature, false ) )
{
logger.info( name + ( line > 0 ? ":" + line : "" )
+ ": Covariant return type change detected: "
+ toSourceForm( c.getName(), oldSignature ) + " has been changed to "
+ toSourceForm( c.getName(), sig ) );
return true;
}
}
}
}
return false;
}
private void error( String type, String sig )
{
hadError = true;
logger.error(name + (line > 0 ? ":" + line : "") + ": Undefined reference: " + toSourceForm( type, sig ) );
}
}
static String toSourceForm( String type, String sig )
{
String sourceType = toSourceType( type );
if ( sig == null )
{
return sourceType;
}
int hash = sig.indexOf( '#' );
if ( hash != -1 )
{
return toSourceType( CharBuffer.wrap( sig, hash + 1, sig.length() ) ) + " " + sourceType + "." + sig.substring( 0, hash );
}
int lparen = sig.indexOf( '(' );
if ( lparen != -1 )
{
int rparen = sig.indexOf( ')' );
if ( rparen != -1 )
{
StringBuilder b = new StringBuilder();
String returnType = sig.substring( rparen + 1 );
if ( returnType.equals( "V" ) )
{
b.append( "void" );
}
else
{
b.append( toSourceType( CharBuffer.wrap( returnType ) ) );
}
b.append( ' ' );
b.append( sourceType );
b.append( '.' );
// XXX consider prettifying
b.append( sig.substring( 0, lparen ) );
b.append( '(' );
boolean first = true;
CharBuffer args = CharBuffer.wrap( sig, lparen + 1, rparen );
while ( args.hasRemaining() )
{
if ( first )
{
first = false;
}
else
{
b.append( ", " );
}
b.append( toSourceType( args ) );
}
b.append( ')' );
return b.toString();
}
}
return "{" + type + ":" + sig + "}"; // ??
}
static String toAnnotationDescriptor( String classFqn )
{
return "L" + fromSourceType( classFqn ) + ";";
}
private static String toSourceType( CharBuffer type )
{
switch ( type.get() )
{
case 'L':
for ( int i = type.position(); i < type.limit(); i++ )
{
if ( type.get( i ) == ';' )
{
String text = type.subSequence( 0, i - type.position() ).toString();
type.position( i + 1 );
return toSourceType( text );
}
}
return "{" + type + "}"; // ??
case '[':
return toSourceType( type ) + "[]";
case 'B':
return "byte";
case 'C':
return "char";
case 'D':
return "double";
case 'F':
return "float";
case 'I':
return "int";
case 'J':
return "long";
case 'S':
return "short";
case 'Z':
return "boolean";
default:
return "{" + type + "}"; // ??
}
}
private static String toSourceType( String text )
{
return text.replaceFirst( "^java/lang/([^/]+)$", "$1" ).replace( '/', '.' ).replace( '$', '.' );
}
private static String fromSourceType( String text )
{
return text.replace( '.', '/' ).replace( '.', '$' );
}
}
