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
  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", alignmentTextContent);
  61             case EXI_PARAMETER_BIT_PACKED:
  62                 options.setAlignmentType(AlignmentType.bitPacked);
  63                 break;
  64             }
  65         } else {
  66             options.setAlignmentType(AlignmentType.bitPacked);
  67         }
  68
  69         final NodeList fidelityElements = root.getElementsByTagName(EXI_PARAMETER_FIDELITY);
  70         if (fidelityElements.getLength() > 0) {
  71             final Element fidelityElement = (Element) fidelityElements.item(0);
  72             if (fidelityElement.getElementsByTagName(EXI_FIDELITY_DTD).getLength() > 0) {
  73                 options.setPreserveDTD(true);
  74             }
  75             if (fidelityElement.getElementsByTagName(EXI_FIDELITY_LEXICAL_VALUES).getLength() > 0) {
  76                 options.setPreserveLexicalValues(true);
  77             }
  78             if (fidelityElement.getElementsByTagName(EXI_FIDELITY_COMMENTS).getLength() > 0) {
  79                 options.setPreserveComments(true);
  80             }
  81             if (fidelityElement.getElementsByTagName(EXI_FIDELITY_PIS).getLength() > 0) {
  82                 options.setPreservePIs(true);
  83             }
  84             if (fidelityElement.getElementsByTagName(EXI_FIDELITY_PREFIXES).getLength() > 0) {
  85                 options.setPreserveNS(true);
  86             }
  87         }
  88         return new EXIParameters(options);
  89     }
  90
  91     public EXIOptions getOptions() {
  92         return options;
  93     }
  94 }