Java Code Examples for org.apache.bcel.classfile.ConstantFieldref#getClassIndex()

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Example 1
Source File: Pass2Verifier.java    From commons-bcel with Apache License 2.0 5 votes vote down vote up 
@Override
public void visitConstantFieldref(final ConstantFieldref obj) {
    if (obj.getTag() != Const.CONSTANT_Fieldref) {
        throw new ClassConstraintException("ConstantFieldref '"+tostring(obj)+"' has wrong tag!");
    }
    final int name_and_type_index = obj.getNameAndTypeIndex();
    final ConstantNameAndType cnat = (ConstantNameAndType) (cp.getConstant(name_and_type_index));
    final String name = ((ConstantUtf8) (cp.getConstant(cnat.getNameIndex()))).getBytes(); // Field or Method name
    if (!validFieldName(name)) {
        throw new ClassConstraintException("Invalid field name '"+name+"' referenced by '"+tostring(obj)+"'.");
    }

    final int class_index = obj.getClassIndex();
    final ConstantClass cc = (ConstantClass) (cp.getConstant(class_index));
    final String className = ((ConstantUtf8) (cp.getConstant(cc.getNameIndex()))).getBytes(); // Class Name in internal form
    if (! validClassName(className)) {
        throw new ClassConstraintException("Illegal class name '"+className+"' used by '"+tostring(obj)+"'.");
    }

    final String sig  = ((ConstantUtf8) (cp.getConstant(cnat.getSignatureIndex()))).getBytes(); // Field or Method sig.(=descriptor)

    try{
        Type.getType(sig); /* Don't need the return value */
    }
    catch (final ClassFormatException cfe) {
        throw new ClassConstraintException("Illegal descriptor (==signature) '"+sig+"' used by '"+tostring(obj)+"'.", cfe);
    }
}