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// Copyright (C) 2009 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.auth.ldap;
import com.google.gerrit.common.data.ParamertizedString;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.PartialResultException;
import javax.naming.directory.Attribute;
import javax.naming.directory.BasicAttribute;
import javax.naming.directory.DirContext;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;
/** Supports issuing parameterized queries against an LDAP data source. */
class LdapQuery {
static final Set<String> ALL_ATTRIBUTES = null;
private final String base;
private final SearchScope searchScope;
private final ParamertizedString pattern;
private final String[] returnAttributes;
LdapQuery(final String base, final SearchScope searchScope,
final ParamertizedString pattern, final Set<String> returnAttributes) {
this.base = base;
this.searchScope = searchScope;
this.pattern = pattern;
if (returnAttributes != null) {
this.returnAttributes = new String[returnAttributes.size()];
returnAttributes.toArray(this.returnAttributes);
} else {
this.returnAttributes = null;
}
}
List<String> getParameters() {
return pattern.getParameterNames();
}
List<Result> query(final DirContext ctx, final Map<String, String> params)
throws NamingException {
final SearchControls sc = new SearchControls();
final NamingEnumeration<SearchResult> res;
sc.setSearchScope(searchScope.scope());
sc.setReturningAttributes(returnAttributes);
res = ctx.search(base, pattern.getRawPattern(), pattern.bind(params), sc);
try {
final List<Result> r = new ArrayList<Result>();
try {
while (res.hasMore()) {
r.add(new Result(res.next()));
}
} catch (PartialResultException e) {
}
return r;
} finally {
res.close();
}
}
class Result {
private final Map<String, Attribute> atts = new HashMap<String, Attribute>();
Result(final SearchResult sr) {
if (returnAttributes != null) {
for (final String attName : returnAttributes) {
final Attribute a = sr.getAttributes().get(attName);
if (a != null && a.size() > 0) {
atts.put(attName, a);
}
}
} else {
NamingEnumeration<? extends Attribute> e = sr.getAttributes().getAll();
while (e.hasMoreElements()) {
final Attribute a = e.nextElement();
atts.put(a.getID(), a);
}
}
atts.put("dn", new BasicAttribute("dn", sr.getNameInNamespace()));
}
String getDN() throws NamingException {
return get("dn");
}
String get(final String attName) throws NamingException {
final Attribute att = getAll(attName);
return att != null && 0 < att.size() ? String.valueOf(att.get(0)) : null;
}
Attribute getAll(final String attName) {
return atts.get(attName);
}
Set<String> attributes() {
return Collections.unmodifiableSet(atts.keySet());
}
@Override
public String toString() {
try {
return getDN();
} catch (NamingException e) {
return "";
}
}
}
}
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