| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.felix.cm.impl.helper; |
| |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| |
| public abstract class ConfigurationMap<T> |
| { |
| private Map<String, T> configurations; |
| |
| |
| protected ConfigurationMap( final String[] configuredPids ) |
| { |
| this.configurations = Collections.emptyMap(); |
| setConfiguredPids( configuredPids ); |
| } |
| |
| |
| protected abstract Map<String, T> createMap( int size ); |
| |
| |
| protected abstract boolean shallTake( TargetedPID configPid, TargetedPID factoryPid, long revision ); |
| |
| |
| protected abstract void record( TargetedPID configPid, TargetedPID factoryPid, long revision ); |
| |
| |
| protected abstract boolean removeConfiguration( TargetedPID configPid, TargetedPID factoryPid ); |
| |
| |
| protected T get( final TargetedPID key ) |
| { |
| final String servicePid = getKeyPid( key ); |
| if ( servicePid != null ) |
| { |
| return this.configurations.get( servicePid ); |
| } |
| |
| // the targeted PID does not match here |
| return null; |
| } |
| |
| |
| protected void put( final TargetedPID key, final T value ) |
| { |
| final String servicePid = getKeyPid( key ); |
| if ( servicePid != null ) |
| { |
| this.configurations.put( servicePid, value ); |
| } |
| } |
| |
| |
| protected String getKeyPid( final TargetedPID targetedPid ) |
| { |
| // regular use case: service PID is the key |
| if ( this.accepts( targetedPid.getServicePid() ) ) |
| { |
| return targetedPid.getServicePid(); |
| } |
| |
| // the raw PID is the key (if the service PID contains pipes) |
| if ( this.accepts( targetedPid.getRawPid() ) ) |
| { |
| return targetedPid.getRawPid(); |
| } |
| |
| // this is not really expected here |
| return null; |
| } |
| |
| |
| /** |
| * Returns <code>true</code> if this map is foreseen to take a |
| * configuration with the given service PID. |
| * |
| * @param servicePid The service PID of the configuration which is |
| * the part of the targeted PID without the bundle's symbolic |
| * name, version, and location; i.e. {@link TargetedPID#getServicePid()} |
| * |
| * @return <code>true</code> if this map is configured to take |
| * configurations for the service PID. |
| */ |
| public boolean accepts( final String servicePid ) |
| { |
| return configurations.containsKey( servicePid ); |
| } |
| |
| |
| public void setConfiguredPids( String[] configuredPids ) |
| { |
| final Map<String, T> newConfigs; |
| if ( configuredPids != null ) |
| { |
| newConfigs = this.createMap( configuredPids.length ); |
| for ( String pid : configuredPids ) |
| { |
| newConfigs.put( pid, this.configurations.get( pid ) ); |
| } |
| } |
| else |
| { |
| newConfigs = Collections.emptyMap(); |
| } |
| this.configurations = newConfigs; |
| } |
| |
| |
| /** |
| * Returns <code>true</code> if the set of service PIDs given is |
| * different from the current set of service PIDs. |
| * <p> |
| * For comparison a <code>null</code> argument is considered to |
| * be an empty set of service PIDs. |
| * |
| * @param pids The new set of service PIDs to be compared to the |
| * current set of service PIDs. |
| * @return <code>true</code> if the set is different |
| */ |
| boolean isDifferentPids( final String[] pids ) |
| { |
| if ( this.configurations.isEmpty() && pids == null ) |
| { |
| return false; |
| } |
| else if ( this.configurations.isEmpty() ) |
| { |
| return true; |
| } |
| else if ( pids == null ) |
| { |
| return true; |
| } |
| else if ( this.configurations.size() != pids.length ) |
| { |
| return true; |
| } |
| else |
| { |
| Set<String> thisPids = this.configurations.keySet(); |
| HashSet<String> otherPids = new HashSet<String>( Arrays.asList( pids ) ); |
| return !thisPids.equals( otherPids ); |
| } |
| } |
| } |