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package com.unboundid.directory.sdk.examples;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import com.unboundid.directory.sdk.common.types.CompletedOperationContext;
import com.unboundid.directory.sdk.common.types.CompletedSearchOperationContext;
import com.unboundid.directory.sdk.ds.api.ResultCriteria;
import com.unboundid.directory.sdk.ds.config.ResultCriteriaConfig;
import com.unboundid.directory.sdk.ds.types.DirectoryServerContext;
import com.unboundid.ldap.sdk.LDAPException;
import com.unboundid.ldap.sdk.ResultCode;
import com.unboundid.util.args.ArgumentException;
import com.unboundid.util.args.ArgumentParser;
import com.unboundid.util.args.IntegerArgument;
/**
* This class provides a simple example of a result criteria implementation that
* may be used to match search operations that returned at least a specified
* number of entries. It has one configuration argument:
* <UL>
* <LI>min-entries-returned -- The minimum number of entries that must have
* been returned for a search operation in order for this criteria to be
* considered a match. If this is not provided, then a default value of
* one will be used.</LI>
* </UL>
*/
public final class ExampleResultCriteria
extends ResultCriteria
{
/**
* The name of the argument that will be used to specify the minimum number
* of entries that should have been returned.
*/
private static final String ARG_MIN_ENTRIES = "min-entries-returned";
// The minimum number of entries that should have been returned.
private volatile long minEntries = 1L;
/**
* Creates a new instance of this result criteria. All criteria
* implementations must include a default constructor, but any initialization
* should generally be done in the {@code initializeResultCriteria} method.
*/
public ExampleResultCriteria()
{
// No implementation required.
}
/**
* Retrieves a human-readable name for this extension.
*
* @return A human-readable name for this extension.
*/
@Override()
public String getExtensionName()
{
return "Example Result Criteria";
}
/**
* Retrieves a human-readable description for this extension. Each element
* of the array that is returned will be considered a separate paragraph in
* generated documentation.
*
* @return A human-readable description for this extension, or {@code null}
* or an empty array if no description should be available.
*/
@Override()
public String[] getExtensionDescription()
{
return new String[]
{
"This result criteria serves as an example that may be used to " +
"demonstrate the process for creating a third-party result " +
"criteria. It will match only search operations in which at " +
"least a specified number of entries were returned."
};
}
/**
* Updates the provided argument parser to define any configuration arguments
* which may be used by this plugin. The argument parser may also be updated
* to define relationships between arguments (e.g., to specify required,
* exclusive, or dependent argument sets).
*
* @param parser The argument parser to be updated with the configuration
* arguments which may be used by this plugin.
*
* @throws ArgumentException If a problem is encountered while updating the
* provided argument parser.
*/
@Override()
public void defineConfigArguments(final ArgumentParser parser)
throws ArgumentException
{
// Add an argument that allows you to specify the minimum number of entries
// to be returned.
final Character shortIdentifier = null;
final String longIdentifier = ARG_MIN_ENTRIES;
final boolean required = false;
final int maxOccurrences = 1;
final int lowerBound = 1;
final int upperBound = Integer.MAX_VALUE;
final int defaultValue = 1;
final String placeholder = "{num}";
final String description = "The minimum number of entries that " +
"must have been returned for this criteria to be considered a match.";
parser.addArgument(new IntegerArgument(shortIdentifier, longIdentifier,
required, maxOccurrences, placeholder, description, lowerBound,
upperBound, defaultValue));
}
/**
* Initializes this result criteria.
*
* @param serverContext A handle to the server context for the server in
* which this extension is running.
* @param config The general configuration for this result criteria.
* @param parser The argument parser which has been initialized from
* the configuration for this result criteria.
*
* @throws LDAPException If a problem occurs while initializing this result
* criteria.
*/
@Override()
public void initializeResultCriteria(
final DirectoryServerContext serverContext,
final ResultCriteriaConfig config,
final ArgumentParser parser)
throws LDAPException
{
// Get the argument used to specify the minimum number of entries to return.
final IntegerArgument minEntriesArg =
(IntegerArgument) parser.getNamedArgument(ARG_MIN_ENTRIES);
if (minEntriesArg == null)
{
minEntries = 1L;
}
else
{
minEntries = minEntriesArg.getValue().longValue();
}
}
/**
* {@inheritDoc}
*/
@Override()
public boolean isConfigurationAcceptable(
final ResultCriteriaConfig config,
final ArgumentParser parser,
final List<String> unacceptableReasons)
{
// No extended validation will be performed by default.
return true;
}
/**
* {@inheritDoc}
*/
@Override()
public ResultCode applyConfiguration(final ResultCriteriaConfig config,
final ArgumentParser parser,
final List<String> adminActionsRequired,
final List<String> messages)
{
// Get the argument used to specify the minimum number of entries to return.
final IntegerArgument minEntriesArg =
(IntegerArgument) parser.getNamedArgument(ARG_MIN_ENTRIES);
if (minEntriesArg == null)
{
minEntries = 1L;
}
else
{
minEntries = minEntriesArg.getValue().longValue();
}
return ResultCode.SUCCESS;
}
/**
* Performs any cleanup which may be necessary when this result criteria
* is to be taken out of service.
*/
@Override()
public void finalizeResultCriteria()
{
// No implementation is required.
}
/**
* Indicates whether the provided operation matches the criteria for this
* result criteria object.
*
* @param o The operation for which to make the determination.
*
* @return {@code true} if the provided operation matches the criteria for
* this result criteria object, or {@code false} if not.
*/
@Override()
public boolean matches(final CompletedOperationContext o)
{
// This method will only be invoked for non-search operations, so it will
// never match.
return false;
}
/**
* Indicates whether the provided search operation matches the criteria for
* this result criteria object. In the default implementation, this method
* simply invokes the {@link #matches(CompletedOperationContext)} method, and
* therefore it only needs to be overridden if search-specific processing is
* needed (e.g., to consider the number of entries or references returned, or
* whether the search is unindexed).
*
* @param o The search operation for which to make the determination.
*
* @return {@code true} if the provided search operation matches the criteria
* for this result criteria object, or {@code false} if not.
*/
@Override()
public boolean matches(final CompletedSearchOperationContext o)
{
// This method will only be called for search operations, so we only need
// to check the number of entries that were returned by the search.
return (o.getEntryCount() >= minEntries);
}
/**
* {@inheritDoc}
*/
@Override()
public Map<List<String>,String> getExamplesArgumentSets()
{
final LinkedHashMap<List<String>,String> exampleMap =
new LinkedHashMap<List<String>,String>(1);
exampleMap.put(
Arrays.asList(ARG_MIN_ENTRIES + "=5"),
"Match any search operation that returned at least 5 entries.");
return Collections.unmodifiableMap(exampleMap);
}
}
