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

Example 1 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project qpid-broker-j by apache.

the class BrokerTestHelper method createSubClassByteCode.

private static byte[] createSubClassByteCode(final String className, final Class<?>[] interfaces) {
    String[] ifnames = new String[interfaces.length];
    for (int i = 0; i < interfaces.length; i++) {
        ifnames[i] = interfaces[i].getName();
    }
    ClassGen classGen = new ClassGen(className, "java.lang.Object", "<generated>", ACC_PUBLIC | ACC_SUPER | ACC_INTERFACE, ifnames);
    JavaClass javaClass = classGen.getJavaClass();
    try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
        javaClass.dump(out);
        return out.toByteArray();
    } catch (IOException ioex) {
        throw new IllegalStateException("Could not write to a ByteArrayOutputStream - should not happen", ioex);
    }
}

Example 2 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project ant by apache.

the class JavaClassHelper method getConstants.

/**
 * Get the constants declared in a file as name=value
 *
 * @param bytes the class as a array of bytes
 * @return a StringBuffer contains the name=value pairs
 * @exception IOException if an error occurs
 */
public static StringBuffer getConstants(final byte[] bytes) throws IOException {
    final StringBuffer sb = new StringBuffer();
    final ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
    final ClassParser parser = new ClassParser(bis, "");
    final JavaClass javaClass = parser.parse();
    final Field[] fields = javaClass.getFields();
    for (final Field field : fields) {
        if (field != null) {
            final ConstantValue cv = field.getConstantValue();
            if (cv != null) {
                String cvs = cv.toString();
                // Remove start and end quotes if field is a String
                if (cvs.startsWith("\"") && cvs.endsWith("\"")) {
                    cvs = cvs.substring(1, cvs.length() - 1);
                }
                sb.append(field.getName());
                sb.append('=');
                sb.append(cvs);
                sb.append(LS);
            }
        }
    }
    return sb;
}

Example 3 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project contribution by checkstyle.

the class HiddenInheritedFieldCheck method visitObject.

/**
 * @see com.puppycrawl.tools.checkstyle.bcel.IObjectSetVisitor
 */
public void visitObject(Object aJavaClass) {
    final JavaClass javaClass = (JavaClass) aJavaClass;
    final String className = javaClass.getClassName();
    final JavaClass[] superClasses = javaClass.getSuperClasses();
    final Field[] fields = javaClass.getFields();
    // Check all fields
    for (int i = 0; i < fields.length; i++) {
        final Field field = fields[i];
        // Go through all superclasses
        for (int j = 0; j < superClasses.length; j++) {
            final JavaClass superClass = superClasses[j];
            final String superClassName = superClass.getClassName();
            final Field[] superClassFields = superClass.getFields();
            // Go through the filds of the superclasses
            for (int k = 0; k < superClassFields.length; k++) {
                final Field superClassField = superClassFields[k];
                if (!superClassField.isPrivate() && superClassField.getName().equals(field.getName()) && !ignore(className, field)) {
                    log(javaClass, 0, "hidden.inherited.field", new Object[] { fields[i], superClassName });
                }
            }
        }
    }
}

Example 4 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project contribution by checkstyle.

the class HiddenStaticMethodCheck method visitObject.

/**
 * @see com.puppycrawl.tools.checkstyle.bcel.IObjectSetVisitor
 */
public void visitObject(Object aJavaClass) {
    final JavaClass javaClass = (JavaClass) aJavaClass;
    final String className = javaClass.getClassName();
    final JavaClass[] superClasses = javaClass.getSuperClasses();
    final Method[] methods = javaClass.getMethods();
    // Check all methods
    for (int i = 0; i < methods.length; i++) {
        final Method method = methods[i];
        // Check that the method is a possible match
        if (!method.isPrivate() && method.isStatic()) {
            // Go through all their superclasses
            for (int j = 0; j < superClasses.length; j++) {
                final JavaClass superClass = superClasses[j];
                final String superClassName = superClass.getClassName();
                final Method[] superClassMethods = superClass.getMethods();
                // Go through the methods of the superclasses
                for (int k = 0; k < superClassMethods.length; k++) {
                    final Method superClassMethod = superClassMethods[k];
                    if (superClassMethod.getName().equals(method.getName()) && !ignore(className, method)) {
                        Type[] methodTypes = method.getArgumentTypes();
                        Type[] superTypes = superClassMethod.getArgumentTypes();
                        if (methodTypes.length == superTypes.length) {
                            boolean match = true;
                            for (int arg = 0; arg < methodTypes.length; arg++) {
                                if (!methodTypes[arg].equals(superTypes[arg])) {
                                    match = false;
                                }
                            }
                            // Same method parameters
                            if (match) {
                                log(javaClass, 0, "hidden.static.method", new Object[] { method, superClassName });
                            }
                        }
                    }
                }
            }
        }
    }
}

Example 5 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project contribution by checkstyle.

the class UnreadFieldCheck method leaveSet.

/**
 * @see com.puppycrawl.tools.checkstyle.bcel.IObjectSetVisitor
 */
public void leaveSet(Set aJavaClasses) {
    final Iterator it = aJavaClasses.iterator();
    while (it.hasNext()) {
        final JavaClass javaClass = (JavaClass) it.next();
        final String className = javaClass.getClassName();
        final JavaClassDefinition classDef = findJavaClassDef(javaClass);
        final FieldDefinition[] fieldDefs = classDef.getFieldDefs();
        for (int i = 0; i < fieldDefs.length; i++) {
            if (fieldDefs[i].getReadReferenceCount() == 0) {
                final Field field = fieldDefs[i].getField();
                if (!field.isFinal() && (!ignore(className, field))) {
                    log(javaClass, 0, "unread.field", new Object[] { fieldDefs[i] });
                }
            }
        }
    }
}