--- /dev/null	2019-06-07 20:25:48.603619976 +0000
+++ new/src/java.xml/share/classes/com/sun/org/apache/bcel/internal/classfile/NestMembers.java	2020-01-16 18:05:12.345998740 +0000
@@ -0,0 +1,180 @@
+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.sun.org.apache.bcel.internal.classfile;
+
+import java.io.DataInput;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+import com.sun.org.apache.bcel.internal.Const;
+
+/**
+ * This class is derived from <em>Attribute</em> and records the classes and interfaces that
+ * are authorized to claim membership in the nest hosted by the current class or interface.
+ * There may be at most one NestMembers attribute in a ClassFile structure.
+ *
+ * @see     Attribute
+ */
+public final class NestMembers extends Attribute {
+
+    private int[] classes;
+
+
+    /**
+     * Initialize from another object. Note that both objects use the same
+     * references (shallow copy). Use copy() for a physical copy.
+     */
+    public NestMembers(final NestMembers c) {
+        this(c.getNameIndex(), c.getLength(), c.getClasses(), c.getConstantPool());
+    }
+
+
+    /**
+     * @param name_index Index in constant pool
+     * @param length Content length in bytes
+     * @param classes Table of indices in constant pool
+     * @param constant_pool Array of constants
+     */
+    public NestMembers(final int name_index, final int length, final int[] classes,
+            final ConstantPool constant_pool) {
+        super(Const.ATTR_NEST_MEMBERS, name_index, length, constant_pool);
+        this.classes = classes != null ? classes : new int[0];
+    }
+
+
+    /**
+     * Construct object from input stream.
+     * @param name_index Index in constant pool
+     * @param length Content length in bytes
+     * @param input Input stream
+     * @param constant_pool Array of constants
+     * @throws IOException
+     */
+    NestMembers(final int name_index, final int length, final DataInput input, final ConstantPool constant_pool) throws IOException {
+        this(name_index, length, (int[]) null, constant_pool);
+        final int number_of_classes = input.readUnsignedShort();
+        classes = new int[number_of_classes];
+        for (int i = 0; i < number_of_classes; i++) {
+            classes[i] = input.readUnsignedShort();
+        }
+    }
+
+
+    /**
+     * Called by objects that are traversing the nodes of the tree implicitely
+     * defined by the contents of a Java class. I.e., the hierarchy of methods,
+     * fields, attributes, etc. spawns a tree of objects.
+     *
+     * @param v Visitor object
+     */
+    @Override
+    public void accept( final Visitor v ) {
+        v.visitNestMembers(this);
+    }
+
+
+    /**
+     * Dump NestMembers attribute to file stream in binary format.
+     *
+     * @param file Output file stream
+     * @throws IOException
+     */
+    @Override
+    public void dump( final DataOutputStream file ) throws IOException {
+        super.dump(file);
+        file.writeShort(classes.length);
+        for (final int index : classes) {
+            file.writeShort(index);
+        }
+    }
+
+
+    /**
+     * @return array of indices into constant pool of class names.
+     */
+    public int[] getClasses() {
+        return classes;
+    }
+
+
+    /**
+     * @return Length of classes table.
+     */
+    public int getNumberClasses() {
+        return classes == null ? 0 : classes.length;
+    }
+
+
+    /**
+     * @return string array of class names
+     */
+    public String[] getClassNames() {
+        final String[] names = new String[classes.length];
+        for (int i = 0; i < classes.length; i++) {
+            names[i] = super.getConstantPool().getConstantString(classes[i],
+                    Const.CONSTANT_Class).replace('/', '.');
+        }
+        return names;
+    }
+
+
+    /**
+     * @param classes the list of class indexes
+     * Also redefines number_of_classes according to table length.
+     */
+    public void setClasses( final int[] classes ) {
+        this.classes = classes != null ? classes : new int[0];
+    }
+
+
+    /**
+     * @return String representation, i.e., a list of classes.
+     */
+    @Override
+    public String toString() {
+        final StringBuilder buf = new StringBuilder();
+        buf.append("NestMembers(");
+        buf.append(classes.length);
+        buf.append("):\n");
+        for (final int index : classes) {
+            final String class_name = super.getConstantPool().getConstantString(index, Const.CONSTANT_Class);
+            buf.append("  ").append(Utility.compactClassName(class_name, false)).append("\n");
+        }
+        return buf.substring(0, buf.length()-1); // remove the last newline
+    }
+
+
+    /**
+     * @return deep copy of this attribute
+     */
+    @Override
+    public Attribute copy( final ConstantPool _constant_pool ) {
+        final NestMembers c = (NestMembers) clone();
+        if (classes != null) {
+            c.classes = new int[classes.length];
+            System.arraycopy(classes, 0, c.classes, 0,
+                    classes.length);
+        }
+        c.setConstantPool(_constant_pool);
+        return c;
+    }
+}