Examples with JavaClass org.apache.bcel.classfile.JavaClass used on opensource projects

Example 16 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project fb-contrib by mebigfatguy.

the class FieldCouldBeLocal method visitClassContext.

/**
 * overrides the visitor to collect localizable fields, and then report those that survive all method checks.
 *
 * @param classContext
 *            the context object that holds the JavaClass parsed
 */
@Override
public void visitClassContext(ClassContext classContext) {
    try {
        localizableFields = new HashMap<>();
        visitedBlocks = new BitSet();
        clsContext = classContext;
        clsName = clsContext.getJavaClass().getClassName();
        clsSig = SignatureUtils.classToSignature(clsName);
        JavaClass cls = classContext.getJavaClass();
        Field[] fields = cls.getFields();
        ConstantPool cp = classContext.getConstantPoolGen().getConstantPool();
        for (Field f : fields) {
            if (!f.isStatic() && !f.isVolatile() && (f.getName().indexOf(Values.SYNTHETIC_MEMBER_CHAR) < 0) && f.isPrivate()) {
                FieldAnnotation fa = new FieldAnnotation(cls.getClassName(), f.getName(), f.getSignature(), false);
                boolean hasExternalAnnotation = false;
                for (AnnotationEntry entry : f.getAnnotationEntries()) {
                    ConstantUtf8 cutf = (ConstantUtf8) cp.getConstant(entry.getTypeIndex());
                    if (!cutf.getBytes().startsWith(Values.JAVA)) {
                        hasExternalAnnotation = true;
                        break;
                    }
                }
                localizableFields.put(f.getName(), new FieldInfo(fa, hasExternalAnnotation));
            }
        }
        if (!localizableFields.isEmpty()) {
            buildMethodFieldModifiers(classContext);
            super.visitClassContext(classContext);
            for (FieldInfo fi : localizableFields.values()) {
                FieldAnnotation fa = fi.getFieldAnnotation();
                SourceLineAnnotation sla = fi.getSrcLineAnnotation();
                BugInstance bug = new BugInstance(this, BugType.FCBL_FIELD_COULD_BE_LOCAL.name(), NORMAL_PRIORITY).addClass(this).addField(fa);
                if (sla != null) {
                    bug.addSourceLine(sla);
                }
                bugReporter.reportBug(bug);
            }
        }
    } finally {
        localizableFields = null;
        visitedBlocks = null;
        clsContext = null;
        methodFieldModifiers = null;
    }
}

Example 17 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project fb-contrib by mebigfatguy.

the class PossibleMemoryBloat method parseFields.

private void parseFields(ClassContext classContext) {
    JavaClass cls = classContext.getJavaClass();
    Field[] fields = cls.getFields();
    for (Field f : fields) {
        String sig = f.getSignature();
        if (f.isStatic()) {
            if (bloatableSigs.contains(sig)) {
                bloatableCandidates.put(XFactory.createXField(cls.getClassName(), f.getName(), f.getSignature(), f.isStatic()), FieldAnnotation.fromBCELField(cls, f));
            }
        } else if ("Ljava/lang/ThreadLocal;".equals(sig)) {
            threadLocalNonStaticFields.add(FieldAnnotation.fromBCELField(cls, f));
        }
    }
}

Example 18 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project fb-contrib by mebigfatguy.

the class PresizeCollections method isSizedSource.

@Nullable
private PSCUserValue isSizedSource(OpcodeStack.Item itm) {
    try {
        String sig = itm.getSignature();
        JavaClass cls = Repository.lookupClass(sig.substring(1, sig.length() - 1));
        if (cls.instanceOf(collectionClass)) {
            return new PSCUserValue(true);
        }
    } catch (ClassNotFoundException e) {
        bugReporter.reportMissingClass(e);
    }
    return null;
}

Example 19 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project fb-contrib by mebigfatguy.

the class ReflectionOnObjectMethods method visitClassContext.

/**
 * implements the visitor to create the stack and local and field maps for Class arrays to be used for getting the reflection method
 *
 * @param classContext
 *            the context object of the currently parse class
 */
@Override
public void visitClassContext(ClassContext classContext) {
    try {
        stack = new OpcodeStack();
        localClassTypes = new HashMap<>();
        fieldClassTypes = new HashMap<>();
        JavaClass cls = classContext.getJavaClass();
        Method staticInit = findStaticInitializer(cls);
        if (staticInit != null) {
            setupVisitorForClass(cls);
            doVisitMethod(staticInit);
        }
        super.visitClassContext(classContext);
    } finally {
        stack = null;
        localClassTypes = null;
        fieldClassTypes = null;
    }
}

Example 20 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project fb-contrib by mebigfatguy.

the class RuntimeExceptionDeclared method visitMethod.

/**
 * overrides the visitor to find declared runtime exceptions
 *
 * @param obj
 *            the method object of the currently parsed method
 */
@Override
public void visitMethod(final Method obj) {
    if (obj.isSynthetic()) {
        return;
    }
    ExceptionTable et = obj.getExceptionTable();
    if (et != null) {
        String[] exNames = et.getExceptionNames();
        Set<String> methodRTExceptions = new HashSet<>(6);
        int priority = LOW_PRIORITY;
        boolean foundRuntime = false;
        for (String ex : exNames) {
            boolean isRuntime = false;
            if (runtimeExceptions.contains(ex)) {
                isRuntime = true;
            } else {
                try {
                    JavaClass exClass = Repository.lookupClass(ex);
                    if (exClass.instanceOf(runtimeExceptionClass)) {
                        runtimeExceptions.add(ex);
                        if (ex.startsWith("java.lang.")) {
                            priority = NORMAL_PRIORITY;
                        }
                        isRuntime = true;
                    }
                } catch (ClassNotFoundException cnfe) {
                    bugReporter.reportMissingClass(cnfe);
                }
            }
            if (isRuntime) {
                foundRuntime = true;
                methodRTExceptions.add(ex);
            }
        }
        if (foundRuntime) {
            BugInstance bug = new BugInstance(this, BugType.DRE_DECLARED_RUNTIME_EXCEPTION.name(), priority).addClass(this).addMethod(this);
            for (String ex : methodRTExceptions) {
                bug.add(new StringAnnotation(ex));
            }
            bugReporter.reportBug(bug);
        }
    }
}