netconf/netconf-netty-util/src/main/java/org/opendaylight/netconf/nettyutil/handler/exi/EXIParameters.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.netconf.nettyutil.handler.exi;
   9
  10 import com.google.common.base.Preconditions;
  11 import org.opendaylight.controller.config.util.xml.XmlElement;
  12 import org.openexi.proc.common.AlignmentType;
  13 import org.openexi.proc.common.EXIOptions;
  14 import org.openexi.proc.common.EXIOptionsException;
  15 import org.slf4j.Logger;
  16 import org.slf4j.LoggerFactory;
  17 import org.w3c.dom.Element;
  18 import org.w3c.dom.NodeList;
  19
  20 public final class EXIParameters {
  21     private static final String EXI_PARAMETER_ALIGNMENT = "alignment";
  22     static final String EXI_PARAMETER_BYTE_ALIGNED = "byte-aligned";
  23     static final String EXI_PARAMETER_BIT_PACKED = "bit-packed";
  24     static final String EXI_PARAMETER_COMPRESSED = "compressed";
  25     static final String EXI_PARAMETER_PRE_COMPRESSION = "pre-compression";
  26
  27     private static final String EXI_PARAMETER_FIDELITY = "fidelity";
  28     private static final String EXI_FIDELITY_DTD = "dtd";
  29     private static final String EXI_FIDELITY_LEXICAL_VALUES = "lexical-values";
  30     private static final String EXI_FIDELITY_COMMENTS = "comments";
  31     private static final String EXI_FIDELITY_PIS = "pis";
  32     private static final String EXI_FIDELITY_PREFIXES = "prefixes";
  33
  34     private final EXIOptions options;
  35     private static final Logger LOG = LoggerFactory.getLogger(EXIParameters.class);
  36
  37     private EXIParameters(final EXIOptions options) {
  38         this.options = Preconditions.checkNotNull(options);
  39     }
  40
  41     @SuppressWarnings("checkstyle:FallThrough")
  42     public static EXIParameters fromXmlElement(final XmlElement root) throws EXIOptionsException {
  43         final EXIOptions options =  new EXIOptions();
  44         final NodeList alignmentElements = root.getElementsByTagName(EXI_PARAMETER_ALIGNMENT);
  45         if (alignmentElements.getLength() > 0) {
  46             final Element alignmentElement = (Element) alignmentElements.item(0);
  47             final String alignmentTextContent = alignmentElement.getTextContent().trim();
  48
  49             switch (alignmentTextContent) {
  50                 case EXI_PARAMETER_BYTE_ALIGNED:
  51                     options.setAlignmentType(AlignmentType.byteAligned);
  52                     break;
  53                 case EXI_PARAMETER_COMPRESSED:
  54                     options.setAlignmentType(AlignmentType.compress);
  55                     break;
  56                 case EXI_PARAMETER_PRE_COMPRESSION:
  57                     options.setAlignmentType(AlignmentType.preCompress);
  58                     break;
  59                 default:
  60                     LOG.warn("Unexpected value in alignmentTextContent: {} , using default value",
  61                             alignmentTextContent);
  62                 case EXI_PARAMETER_BIT_PACKED:
  63                     options.setAlignmentType(AlignmentType.bitPacked);
  64                     break;
  65             }
  66         } else {
  67             options.setAlignmentType(AlignmentType.bitPacked);
  68         }
  69
  70         final NodeList fidelityElements = root.getElementsByTagName(EXI_PARAMETER_FIDELITY);
  71         if (fidelityElements.getLength() > 0) {
  72             final Element fidelityElement = (Element) fidelityElements.item(0);
  73             if (fidelityElement.getElementsByTagName(EXI_FIDELITY_DTD).getLength() > 0) {
  74                 options.setPreserveDTD(true);
  75             }
  76             if (fidelityElement.getElementsByTagName(EXI_FIDELITY_LEXICAL_VALUES).getLength() > 0) {
  77                 options.setPreserveLexicalValues(true);
  78             }
  79             if (fidelityElement.getElementsByTagName(EXI_FIDELITY_COMMENTS).getLength() > 0) {
  80                 options.setPreserveComments(true);
  81             }
  82             if (fidelityElement.getElementsByTagName(EXI_FIDELITY_PIS).getLength() > 0) {
  83                 options.setPreservePIs(true);
  84             }
  85             if (fidelityElement.getElementsByTagName(EXI_FIDELITY_PREFIXES).getLength() > 0) {
  86                 options.setPreserveNS(true);
  87             }
  88         }
  89         return new EXIParameters(options);
  90     }
  91
  92     public EXIOptions getOptions() {
  93         return options;
  94     }
  95 }