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Java example source code file (GeneralSubtree.java)
The GeneralSubtree.java Java example source code/* * Copyright (c) 1997, 2004, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.security.x509; import java.io.*; import sun.security.util.*; /** * Represent the GeneralSubtree ASN.1 object, whose syntax is: * <pre> * GeneralSubtree ::= SEQUENCE { * base GeneralName, * minimum [0] BaseDistance DEFAULT 0, * maximum [1] BaseDistance OPTIONAL * } * BaseDistance ::= INTEGER (0..MAX) * </pre> * @author Amit Kapoor * @author Hemma Prafullchandra */ public class GeneralSubtree { private static final byte TAG_MIN = 0; private static final byte TAG_MAX = 1; private static final int MIN_DEFAULT = 0; private GeneralName name; private int minimum = MIN_DEFAULT; private int maximum = -1; private int myhash = -1; /** * The default constructor for the class. * * @params name the GeneralName * @params min the minimum BaseDistance * @params max the maximum BaseDistance */ public GeneralSubtree(GeneralName name, int min, int max) { this.name = name; this.minimum = min; this.maximum = max; } /** * Create the object from its DER encoded form. * * @param val the DER encoded from of the same. */ public GeneralSubtree(DerValue val) throws IOException { if (val.tag != DerValue.tag_Sequence) { throw new IOException("Invalid encoding for GeneralSubtree."); } name = new GeneralName(val.data.getDerValue(), true); // NB. this is always encoded with the IMPLICIT tag // The checks only make sense if we assume implicit tagging, // with explicit tagging the form is always constructed. while (val.data.available() != 0) { DerValue opt = val.data.getDerValue(); if (opt.isContextSpecific(TAG_MIN) && !opt.isConstructed()) { opt.resetTag(DerValue.tag_Integer); minimum = opt.getInteger(); } else if (opt.isContextSpecific(TAG_MAX) && !opt.isConstructed()) { opt.resetTag(DerValue.tag_Integer); maximum = opt.getInteger(); } else throw new IOException("Invalid encoding of GeneralSubtree."); } } /** * Return the GeneralName. * * @return the GeneralName */ public GeneralName getName() { //XXXX May want to consider cloning this return name; } /** * Return the minimum BaseDistance. * * @return the minimum BaseDistance. Default is 0 if not set. */ public int getMinimum() { return minimum; } /** * Return the maximum BaseDistance. * * @return the maximum BaseDistance, or -1 if not set. */ public int getMaximum() { return maximum; } /** * Return a printable string of the GeneralSubtree. */ public String toString() { String s = "\n GeneralSubtree: [\n" + " GeneralName: " + ((name == null) ? "" : name.toString()) + "\n Minimum: " + minimum; if (maximum == -1) { s += "\t Maximum: undefined"; } else s += "\t Maximum: " + maximum; s += " ]\n"; return (s); } /** * Compare this GeneralSubtree with another * * @param other GeneralSubtree to compare to this * @returns true if match */ public boolean equals(Object other) { if (!(other instanceof GeneralSubtree)) return false; GeneralSubtree otherGS = (GeneralSubtree)other; if (this.name == null) { if (otherGS.name != null) { return false; } } else { if (!((this.name).equals(otherGS.name))) return false; } if (this.minimum != otherGS.minimum) return false; if (this.maximum != otherGS.maximum) return false; return true; } /** * Returns the hash code for this GeneralSubtree. * * @return a hash code value. */ public int hashCode() { if (myhash == -1) { myhash = 17; if (name != null) { myhash = 37 * myhash + name.hashCode(); } if (minimum != MIN_DEFAULT) { myhash = 37 * myhash + minimum; } if (maximum != -1) { myhash = 37 * myhash + maximum; } } return myhash; } /** * Encode the GeneralSubtree. * * @params out the DerOutputStream to encode this object to. */ public void encode(DerOutputStream out) throws IOException { DerOutputStream seq = new DerOutputStream(); name.encode(seq); if (minimum != MIN_DEFAULT) { DerOutputStream tmp = new DerOutputStream(); tmp.putInteger(minimum); seq.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT, false, TAG_MIN), tmp); } if (maximum != -1) { DerOutputStream tmp = new DerOutputStream(); tmp.putInteger(maximum); seq.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT, false, TAG_MAX), tmp); } out.write(DerValue.tag_Sequence, seq); } } Other Java examples (source code examples)Here is a short list of links related to this Java GeneralSubtree.java source code file: |
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