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/* * Copyright (c) 1999, 2000, 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 javax.naming.directory; /**  * This class encapsulates  * factors that determine scope of search and what gets returned  * as a result of the search.  *<p>  * A SearchControls instance is not synchronized against concurrent  * multithreaded access. Multiple threads trying to access and modify  * a single SearchControls instance should lock the object.  *  * @author Rosanna Lee  * @author Scott Seligman  * @since 1.3  */ public class SearchControls implements java.io.Serializable {    /**     * Search the named object.     *<p>     * The NamingEnumeration that results from search()     * using OBJECT_SCOPE will contain one or zero element.     * The enumeration contains one element if the named object satisfies     * the search filter specified in search().     * The element will have as its name the empty string because the names     * of elements in the NamingEnumeration are relative to the     * target context--in this case, the target context is the named object.     * It contains zero element if the named object does not satisfy     * the search filter specified in search().     * <p>     * The value of this constant is <tt>0</tt>.     */    public final static int OBJECT_SCOPE = 0;     /**     * Search one level of the named context.     *<p>     * The NamingEnumeration that results from search()     * using ONELEVEL_SCOPE contains elements with     * objects in the named context that satisfy     * the search filter specified in search().     * The names of elements in the NamingEnumeration are atomic names     * relative to the named context.     * <p>     * The value of this constant is <tt>1</tt>.     */    public final static int ONELEVEL_SCOPE = 1;    /**     * Search the entire subtree rooted at the named object.     *<p>     * If the named object is not a DirContext, search only the object.     * If the named object is a DirContext, search the subtree     * rooted at the named object, including the named object itself.     *<p>     * The search will not cross naming system boundaries.     *<p>     * The NamingEnumeration that results from search()     * using SUBTREE_SCOPE contains elements of objects     * from the subtree (including the named context)     * that satisfy the search filter specified in search().     * The names of elements in the NamingEnumeration are either     * relative to the named context or is a URL string.     * If the named context satisfies the search filter, it is     * included in the enumeration with the empty string as     * its name.     * <p>     * The value of this constant is <tt>2</tt>.     */    public final static int SUBTREE_SCOPE = 2;     /**     * Contains the scope with which to apply the search. One of     * <tt>ONELEVEL_SCOPE</tt>, <tt>OBJECT_SCOPE</tt>, or     * <tt>SUBTREE_SCOPE</tt>.     * @serial     */    private int searchScope;     /**     * Contains the milliseconds to wait before returning     * from search.     * @serial     */    private int timeLimit;     /**     * Indicates whether JNDI links are dereferenced during     * search.     * @serial     */    private boolean derefLink;     /**     *  Indicates whether object is returned in <tt>SearchResult</tt>.     * @serial     */    private boolean returnObj;     /**     * Contains the maximum number of SearchResults to return.     * @serial     */    private long countLimit;     /**     *  Contains the list of attributes to be returned in     * <tt>SearchResult</tt> for each matching entry of search. <tt>null</tt>     * indicates that all attributes are to be returned.     * @serial     */    private String[] attributesToReturn;     /**     * Constructs a search constraints using defaults.     *<p>     * The defaults are:     * <ul>     * <li>search one level     * <li>no maximum return limit for search results     * <li>no time limit for search     * <li>return all attributes associated with objects that satisfy     *   the search filter.     * <li>do not return named object  (return only name and class)     * <li>do not dereference links during search     *</ul>     */    public SearchControls() {        searchScope = ONELEVEL_SCOPE;        timeLimit = 0; // no limit        countLimit = 0; // no limit        derefLink = false;        returnObj = false;        attributesToReturn = null; // return all    }     /**     * Constructs a search constraints using arguments.     * @param scope     The search scope.  One of:     *                  OBJECT_SCOPE, ONELEVEL_SCOPE, SUBTREE_SCOPE.     * @param timelim   The number of milliseconds to wait before returning.     *                  If 0, wait indefinitely.     * @param deref     If true, dereference links during search.     * @param countlim  The maximum number of entries to return.  If 0, return     *                  all entries that satisfy filter.     * @param retobj    If true, return the object bound to the name of the     *                  entry; if false, do not return object.     * @param attrs     The identifiers of the attributes to return along with     *                  the entry.  If null, return all attributes. If empty     *                  return no attributes.     */    public SearchControls(int scope,                             long countlim,                             int timelim,                             String[] attrs,                             boolean retobj,                             boolean deref) {        searchScope = scope;        timeLimit = timelim; // no limit        derefLink = deref;        returnObj = retobj;        countLimit = countlim; // no limit        attributesToReturn = attrs; // return all    }     /**     * Retrieves the search scope of these SearchControls.     *<p>     * One of OBJECT_SCOPE, ONELEVEL_SCOPE, SUBTREE_SCOPE.     *     * @return The search scope of this SearchControls.     * @see #setSearchScope     */    public int getSearchScope() {        return searchScope;    }     /**     * Retrieves the time limit of these SearchControls in milliseconds.     *<p>     * If the value is 0, this means to wait indefinitely.     * @return The time limit of these SearchControls in milliseconds.     * @see #setTimeLimit     */    public int getTimeLimit() {        return timeLimit;    }     /**     * Determines whether links will be dereferenced during the search.     *     * @return true if links will be dereferenced; false otherwise.     * @see #setDerefLinkFlag     */    public boolean getDerefLinkFlag() {        return derefLink;    }     /**     * Determines whether objects will be returned as part of the result.     *     * @return true if objects will be returned; false otherwise.     * @see #setReturningObjFlag     */    public boolean getReturningObjFlag() {        return returnObj;    }     /**     * Retrieves the maximum number of entries that will be returned     * as a result of the search.     *<p>     * 0 indicates that all entries will be returned.     * @return The maximum number of entries that will be returned.     * @see #setCountLimit     */    public long getCountLimit() {        return countLimit;    }     /**     * Retrieves the attributes that will be returned as part of the search.     *<p>     * A value of null indicates that all attributes will be returned.     * An empty array indicates that no attributes are to be returned.     *     * @return An array of attribute ids identifying the attributes that     * will be returned. Can be null.     * @see #setReturningAttributes     */    public String[] getReturningAttributes() {        return attributesToReturn;    }     /**     * Sets the search scope to one of:     * OBJECT_SCOPE, ONELEVEL_SCOPE, SUBTREE_SCOPE.     * @param scope     The search scope of this SearchControls.     * @see #getSearchScope     */    public void setSearchScope(int scope) {        searchScope = scope;    }     /**     * Sets the time limit of these SearchControls in milliseconds.     *<p>     * If the value is 0, this means to wait indefinitely.     * @param ms        The time limit of these SearchControls in milliseconds.     * @see #getTimeLimit     */    public void setTimeLimit(int ms) {        timeLimit = ms;    }     /**     * Enables/disables link dereferencing during the search.     *     * @param on        if true links will be dereferenced; if false, not followed.     * @see #getDerefLinkFlag     */    public void setDerefLinkFlag(boolean on) {        derefLink = on;    }     /**     * Enables/disables returning objects returned as part of the result.     *<p>     * If disabled, only the name and class of the object is returned.     * If enabled, the object will be returned.     *     * @param on        if true, objects will be returned; if false,     *                  objects will not be returned.     * @see #getReturningObjFlag     */    public void setReturningObjFlag(boolean on) {        returnObj = on;    }     /**     * Sets the maximum number of entries to be returned     * as a result of the search.     *<p>     * 0 indicates no limit:  all entries will be returned.     *     * @param limit The maximum number of entries that will be returned.     * @see #getCountLimit     */    public void setCountLimit(long limit) {        countLimit = limit;    }     /**     * Specifies the attributes that will be returned as part of the search.     *<p>     * null indicates that all attributes will be returned.     * An empty array indicates no attributes are returned.     *     * @param attrs An array of attribute ids identifying the attributes that     *              will be returned. Can be null.     * @see #getReturningAttributes     */    public void setReturningAttributes(String[] attrs) {        attributesToReturn = attrs;    }     /**     * Use serialVersionUID from JNDI 1.1.1 for interoperability.     */    private static final long serialVersionUID = -2480540967773454797L;}