/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2010 Sun Microsystems, Inc.
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*/
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package org.opends.server.core;
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import org.opends.messages.Message;
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import static org.opends.messages.SchemaMessages.*;
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import java.util.HashSet;
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import java.util.InputMismatchException;
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import java.util.NoSuchElementException;
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import org.opends.server.types.DirectoryException;
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import org.opends.server.types.DN;
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import org.opends.server.types.Entry;
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import org.opends.server.types.ResultCode;
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import org.opends.server.types.SearchFilter;
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import org.opends.server.util.StaticUtils;
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/**
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* An absolute subtree specification.
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* <p>
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* Absolute subtree specifications are based on RFC 3672 subtree
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* specifications but have the following differences:
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* <ul>
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* <li>the scope of the subtree specification is not related to the
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* location of the entry containing the subtree specification
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* <li>the scope of the subtree specification is defined by the
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* absolute base DN
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* <li>the specification filter is not a set of refinements, but an
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* LDAP search filter.
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* </ul>
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* <p>
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* The string representation of an absolute subtree specification is
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* defined by the following grammar:
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*
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* <pre>
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* SubtreeSpecification = "{" sp ss-absolute-base
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* [ sep sp ss-specificExclusions ]
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* [ sep sp ss-minimum ]
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* [ sep sp ss-maximum ]
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* [ sep sp ss-specificationFilter ]
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* sp "}"
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*
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* ss-absolute-base = "absoluteBase&quot msp DistinguishedName
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*
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* ss-specificExclusions = "specificExclusions&quot
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* msp SpecificExclusions
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*
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* ss-minimum = "minimum&quot msp BaseDistance
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*
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* ss-maximum = "maximum&quot msp BaseDistance
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*
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* ss-specificationFilter = "specificationFilter&quot msp Filter
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*
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* SpecificExclusions = "{"
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* [ sp SpecificExclusion
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* ( "," sp SpecificExclusion ) ]
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* sp "}"
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*
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* SpecificExclusion = chopBefore / chopAfter
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*
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* chopBefore = "chopBefore&quot ":" LocalName
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*
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* chopAfter = "chopAfter&quot ":" LocalName
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*
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* Filter = dquote *SafeUTF8Character dquote
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* </pre>
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*/
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public final class AbsoluteSubtreeSpecification extends
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SimpleSubtreeSpecification {
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// The optional search filter.
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private SearchFilter filter;
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/**
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* Parses the string argument as an absolute subtree specification.
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* <p>
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* The parser is very lenient regarding the ordering of the various
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* subtree specification fields. However, it will not except multiple
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* occurrances of a particular field.
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*
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* @param s
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* The string to be parsed.
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* @return The absolute subtree specification represented by the
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* string argument.
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* @throws DirectoryException
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* If the string does not contain a parsable absolute
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* subtree specification.
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*/
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public static AbsoluteSubtreeSpecification valueOf(String s)
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throws DirectoryException {
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// Default values.
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DN absoluteBaseDN = null;
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int minimum = -1;
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int maximum = -1;
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HashSet<DN> chopBefore = new HashSet<DN>();
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HashSet<DN> chopAfter = new HashSet<DN>();
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SearchFilter filter = null;
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// Value must have an opening left brace.
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Parser parser = new Parser(s);
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boolean isValid = true;
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try {
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parser.skipLeftBrace();
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// Parse each element of the value sequence.
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boolean isFirst = true;
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while (true) {
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if (parser.hasNextRightBrace()) {
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// Make sure that there is a closing brace and no trailing
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// text.
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parser.skipRightBrace();
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if (parser.hasNext()) {
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throw new java.util.InputMismatchException();
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}
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break;
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}
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// Make sure that there is a comma separator if this is not the
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// first element.
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if (!isFirst) {
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parser.skipSeparator();
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} else {
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isFirst = false;
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}
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String key = parser.nextKey();
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if (key.equals("absolutebase")) {
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if (absoluteBaseDN != null) {
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// Absolute base DN specified more than once.
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throw new InputMismatchException();
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}
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absoluteBaseDN = DN.decode(parser.nextStringValue());
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} else if (key.equals("minimum")) {
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if (minimum != -1) {
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// Minimum specified more than once.
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throw new InputMismatchException();
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}
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minimum = parser.nextInt();
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} else if (key.equals("maximum")) {
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if (maximum != -1) {
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// Maximum specified more than once.
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throw new InputMismatchException();
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}
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maximum = parser.nextInt();
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} else if (key.equals("specificationfilter")) {
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if (filter != null) {
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// Filter specified more than once.
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throw new InputMismatchException();
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}
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filter = SearchFilter.createFilterFromString(parser
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.nextStringValue());
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} else if (key.equals("specificexclusions")) {
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if (!chopBefore.isEmpty() || !chopAfter.isEmpty()) {
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// Specific exclusions specified more than once.
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throw new InputMismatchException();
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}
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parser.nextSpecificExclusions(chopBefore, chopAfter);
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} else {
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throw new InputMismatchException();
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}
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}
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// Must have an absolute base DN.
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if (absoluteBaseDN == null) {
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isValid = false;
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}
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// Make default minimum value is 0.
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if (minimum < 0) {
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minimum = 0;
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}
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// Check that the maximum, if specified, is gte the minimum.
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if (maximum >= 0 && maximum < minimum) {
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isValid = false;
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}
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} catch (InputMismatchException e) {
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isValid = false;
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} catch (NoSuchElementException e) {
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isValid = false;
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}
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if (isValid) {
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return new AbsoluteSubtreeSpecification(absoluteBaseDN, minimum,
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maximum, chopBefore, chopAfter, filter);
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} else {
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Message message =
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ERR_ATTR_SYNTAX_ABSOLUTE_SUBTREE_SPECIFICATION_INVALID.get(s);
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throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
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message);
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}
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}
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/**
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* Create a new absolute subtree specification.
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*
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* @param absoluteBaseDN
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* The absolute base DN of the subtree.
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* @param minimumDepth
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* The minimum depth (<=0 means unlimited).
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* @param maximumDepth
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* The maximum depth (<0 means unlimited).
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* @param chopBefore
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* The set of chop before local names (relative to the base
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* DN), or <code>null</code> if there are none.
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* @param chopAfter
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* The set of chop after local names (relative to the base
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* DN), or <code>null</code> if there are none.
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* @param filter
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* The optional search filter (<code>null</code> if there
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* is no filter).
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*/
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public AbsoluteSubtreeSpecification(DN absoluteBaseDN, int minimumDepth,
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int maximumDepth, Iterable<DN> chopBefore, Iterable<DN> chopAfter,
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SearchFilter filter) {
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super(absoluteBaseDN, minimumDepth, maximumDepth, chopBefore, chopAfter);
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this.filter = filter;
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}
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/**
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* Get the absolute base DN.
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*
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* @return Returns the absolute base DN.
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*/
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public DN getAbsoluteBaseDN() {
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return getBaseDN();
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}
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/**
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* Get the specification filter.
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*
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* @return Returns the search filter, or <code>null</code> if there
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* is no filter.
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*/
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public SearchFilter getFilter() {
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return filter;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean isWithinScope(Entry entry) {
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if (isDNWithinScope(entry.getDN())) {
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if (filter != null) {
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try {
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return filter.matchesEntry(entry);
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} catch (DirectoryException e) {
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// TODO: need to decide what to do with the exception here. It's
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// probably safe to ignore, but we could log it perhaps.
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return false;
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}
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}
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return true;
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} else {
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return false;
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public StringBuilder toString(StringBuilder builder) {
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builder.append("{ absoluteBase ");
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StaticUtils.toRFC3641StringValue(builder, getBaseDN().toString());
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Iterable<DN> chopBefore = getChopBefore();
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Iterable<DN> chopAfter = getChopAfter();
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if ((chopBefore != null && chopBefore.iterator().hasNext())
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|| (chopAfter != null && chopAfter.iterator().hasNext())) {
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builder.append(", specificExclusions { ");
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boolean isFirst = true;
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if (chopBefore != null) {
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for (DN dn : chopBefore) {
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if (!isFirst) {
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builder.append(", chopBefore:");
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} else {
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builder.append("chopBefore:");
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isFirst = false;
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}
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StaticUtils.toRFC3641StringValue(builder, dn.toString());
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}
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}
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if (chopAfter != null) {
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for (DN dn : chopAfter) {
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if (!isFirst) {
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builder.append(", chopAfter:");
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} else {
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builder.append("chopAfter:");
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isFirst = false;
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}
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StaticUtils.toRFC3641StringValue(builder, dn.toString());
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}
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}
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builder.append(" }");
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}
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if (getMinimumDepth() > 0) {
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builder.append(", minimum ");
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builder.append(getMinimumDepth());
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}
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if (getMaximumDepth() >= 0) {
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builder.append(", maximum ");
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builder.append(getMaximumDepth());
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}
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if (filter != null) {
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builder.append(", specificationFilter ");
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StaticUtils.toRFC3641StringValue(builder, filter.toString());
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}
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builder.append(" }");
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return builder;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean equals(Object obj) {
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if (this == obj) {
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return true;
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}
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if (obj instanceof AbsoluteSubtreeSpecification) {
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AbsoluteSubtreeSpecification other = (AbsoluteSubtreeSpecification) obj;
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if (!commonComponentsEquals(other)) {
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return false;
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}
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if (!getBaseDN().equals(other.getBaseDN())) {
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return false;
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}
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if (filter != null) {
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return filter.equals(other.filter);
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} else {
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return filter == other.filter;
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}
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}
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return false;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public int hashCode() {
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int hash = commonComponentsHashCode();
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hash = hash * 31 + getBaseDN().hashCode();
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if (filter != null) {
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hash = hash * 31 + filter.hashCode();
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}
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return hash;
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}
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}
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