public ConstantPoolGen()

in src/main/java/org/apache/bcel/generic/ConstantPoolGen.java [104:214]

• 78 lines of code
• 17 McCabe index (conditional complexity)

    public ConstantPoolGen(final Constant[] cs) {
        final StringBuilder sb = new StringBuilder(DEFAULT_BUFFER_SIZE);

        size = Math.min(Math.max(DEFAULT_BUFFER_SIZE, cs.length + 64), Const.MAX_CP_ENTRIES + 1);
        constants = Arrays.copyOf(cs, size);

        if (cs.length > 0) {
            index = cs.length;
        }

        for (int i = 1; i < index; i++) {
            final Constant c = constants[i];
            if (c instanceof ConstantString) {
                final ConstantString s = (ConstantString) c;
                final ConstantUtf8 u8 = (ConstantUtf8) constants[s.getStringIndex()];
                final String key = u8.getBytes();
                if (!stringTable.containsKey(key)) {
                    stringTable.put(key, Integer.valueOf(i));
                }
            } else if (c instanceof ConstantClass) {
                final ConstantClass s = (ConstantClass) c;
                final ConstantUtf8 u8 = (ConstantUtf8) constants[s.getNameIndex()];
                final String key = u8.getBytes();
                if (!classTable.containsKey(key)) {
                    classTable.put(key, Integer.valueOf(i));
                }
            } else if (c instanceof ConstantNameAndType) {
                final ConstantNameAndType n = (ConstantNameAndType) c;
                final ConstantUtf8 u8NameIdx = (ConstantUtf8) constants[n.getNameIndex()];
                final ConstantUtf8 u8SigIdx = (ConstantUtf8) constants[n.getSignatureIndex()];

                sb.append(u8NameIdx.getBytes());
                sb.append(NAT_DELIM);
                sb.append(u8SigIdx.getBytes());
                final String key = sb.toString();
                sb.delete(0, sb.length());

                if (!natTable.containsKey(key)) {
                    natTable.put(key, Integer.valueOf(i));
                }
            } else if (c instanceof ConstantUtf8) {
                final ConstantUtf8 u = (ConstantUtf8) c;
                final String key = u.getBytes();
                if (!utf8Table.containsKey(key)) {
                    utf8Table.put(key, Integer.valueOf(i));
                }
            } else if (c instanceof ConstantCP) {
                final ConstantCP m = (ConstantCP) c;
                String className;
                ConstantUtf8 u8;

                if (c instanceof ConstantInvokeDynamic) {
                    className = Integer.toString(((ConstantInvokeDynamic) m).getBootstrapMethodAttrIndex());
                } else if (c instanceof ConstantDynamic) {
                    className = Integer.toString(((ConstantDynamic) m).getBootstrapMethodAttrIndex());
                } else {
                    final ConstantClass clazz = (ConstantClass) constants[m.getClassIndex()];
                    u8 = (ConstantUtf8) constants[clazz.getNameIndex()];
                    className = Utility.pathToPackage(u8.getBytes());
                }

                final ConstantNameAndType n = (ConstantNameAndType) constants[m.getNameAndTypeIndex()];
                u8 = (ConstantUtf8) constants[n.getNameIndex()];
                final String methodName = u8.getBytes();
                u8 = (ConstantUtf8) constants[n.getSignatureIndex()];
                final String signature = u8.getBytes();

                // Since name cannot begin with digit, we can use METHODREF_DELIM without fear of duplicates
                String delim = METHODREF_DELIM;
                if (c instanceof ConstantInterfaceMethodref) {
                    delim = IMETHODREF_DELIM;
                } else if (c instanceof ConstantFieldref) {
                    delim = FIELDREF_DELIM;
                }

                sb.append(className);
                sb.append(delim);
                sb.append(methodName);
                sb.append(delim);
                sb.append(signature);
                final String key = sb.toString();
                sb.delete(0, sb.length());

                if (!cpTable.containsKey(key)) {
                    cpTable.put(key, Integer.valueOf(i));
                }
            }
//            else if (c == null) { // entries may be null
//                // nothing to do
//            } else if (c instanceof ConstantInteger) {
//                // nothing to do
//            } else if (c instanceof ConstantLong) {
//                // nothing to do
//            } else if (c instanceof ConstantFloat) {
//                // nothing to do
//            } else if (c instanceof ConstantDouble) {
//                // nothing to do
//            } else if (c instanceof org.apache.bcel.classfile.ConstantMethodType) {
//                // TODO should this be handled somehow?
//            } else if (c instanceof org.apache.bcel.classfile.ConstantMethodHandle) {
//                // TODO should this be handled somehow?
//            } else if (c instanceof org.apache.bcel.classfile.ConstantModule) {
//                // TODO should this be handled somehow?
//            } else if (c instanceof org.apache.bcel.classfile.ConstantPackage) {
//                // TODO should this be handled somehow?
//            } else {
//                // Not helpful, should throw an exception.
//                assert false : "Unexpected constant type: " + c.getClass().getName();
//            }
        }
    }