--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.xml/share/classes/com/sun/org/apache/bcel/internal/classfile/ConstantPackage.java	Wed Jun 26 05:49:59 2019 +0000
@@ -0,0 +1,138 @@
+/*
+ * 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 the abstract {@link Constant}
+ * and represents a reference to a package.
+ *
+ * <p>Note: Early access Java 9 support- currently subject to change</p>
+ *
+ * @see     Constant
+ * @since 6.1
+ */
+public final class ConstantPackage extends Constant implements ConstantObject {
+
+    private int name_index;
+
+
+    /**
+     * Initialize from another object.
+     */
+    public ConstantPackage(final ConstantPackage c) {
+        this(c.getNameIndex());
+    }
+
+
+    /**
+     * Initialize instance from file data.
+     *
+     * @param file Input stream
+     * @throws IOException
+     */
+    ConstantPackage(final DataInput file) throws IOException {
+        this(file.readUnsignedShort());
+    }
+
+
+    /**
+     * @param name_index Name index in constant pool.  Should refer to a
+     * ConstantUtf8.
+     */
+    public ConstantPackage(final int name_index) {
+        super(Const.CONSTANT_Package);
+        this.name_index = name_index;
+    }
+
+
+    /**
+     * 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.visitConstantPackage(this);
+    }
+
+
+    /**
+     * Dump constant package to file stream in binary format.
+     *
+     * @param file Output file stream
+     * @throws IOException
+     */
+    @Override
+    public final void dump( final DataOutputStream file ) throws IOException {
+        file.writeByte(super.getTag());
+        file.writeShort(name_index);
+    }
+
+
+    /**
+     * @return Name index in constant pool of package name.
+     */
+    public final int getNameIndex() {
+        return name_index;
+    }
+
+
+    /**
+     * @param name_index the name index in the constant pool of this Constant Package
+     */
+    public final void setNameIndex( final int name_index ) {
+        this.name_index = name_index;
+    }
+
+
+    /** @return String object
+     */
+    @Override
+    public Object getConstantValue( final ConstantPool cp ) {
+        final Constant c = cp.getConstant(name_index, Const.CONSTANT_Utf8);
+        return ((ConstantUtf8) c).getBytes();
+    }
+
+
+    /** @return dereferenced string
+     */
+    public String getBytes( final ConstantPool cp ) {
+        return (String) getConstantValue(cp);
+    }
+
+
+    /**
+     * @return String representation.
+     */
+    @Override
+    public final String toString() {
+        return super.toString() + "(name_index = " + name_index + ")";
+    }
+}