/*
*
* Copyright (C) 2010 JFrog Ltd.
*
* 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 org.jfrog.wharf.ivy.cache;
import org.apache.ivy.core.RelativeUrlResolver;
import org.apache.ivy.core.cache.ResolutionCacheManager;
import org.apache.ivy.core.module.id.ModuleId;
import org.apache.ivy.core.module.id.ModuleRevisionId;
import org.apache.ivy.core.module.status.StatusManager;
import org.apache.ivy.plugins.conflict.ConflictManager;
import org.apache.ivy.plugins.matcher.PatternMatcher;
import org.apache.ivy.plugins.namespace.Namespace;
import org.apache.ivy.plugins.parser.ParserSettings;
import org.apache.ivy.plugins.resolver.DependencyResolver;
import org.apache.ivy.util.Message;
import java.io.File;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
/**
* Keep traces of the usage of a ParserSettings in order to check afterwards that the relevant settings didn't changed.
* <p> A ParserSettingsMonitor provide a ParserSettings that must be used in place of the orignal one. </p> <p> The
* current implementation consider that a settings changed iff one of the used variable has changed. </p>
*/
class ParserSettingsMonitor {
private ParserSettings delegatedSettings;
private final Map/*<String,String>*/ substitutes;
public ParserSettingsMonitor(ParserSettings settings) {
this.delegatedSettings = settings;
this.substitutes = new HashMap();
}
/**
* @return The parser settings that must be used in place of the orignal settings The returned object delegates all
* the call to the original settings.
*/
public ParserSettings getMonitoredSettings() {
return monitoredSettings;
}
/**
* Free the ressource used during the monitoring, keeping only the info required to evaluate hasChanged.
*/
public void endMonitoring() {
monitoredSettings = null;
delegatedSettings = null;
}
/**
* Check if the newSettings is compatible with the original settings that has been monitored. Only the info that
* was actually used is compared.
*/
public boolean hasChanged(ParserSettings newSettings) {
for (Iterator it = substitutes.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Entry) it.next();
String key = (String) entry.getKey();
Object oldValue = entry.getValue();
String newValue = newSettings.substitute(key);
if (!oldValue.equals(newValue)) {
Message.debug("settings variable has changed for : " + entry.getKey());
return true;
}
}
return false;
}
private ParserSettings monitoredSettings = new ParserSettings() {
public ConflictManager getConflictManager(String name) {
return delegatedSettings.getConflictManager(name);
}
public PatternMatcher getMatcher(String matcherName) {
return delegatedSettings.getMatcher(matcherName);
}
public Namespace getNamespace(String namespace) {
return delegatedSettings.getNamespace(namespace);
}
public RelativeUrlResolver getRelativeUrlResolver() {
return delegatedSettings.getRelativeUrlResolver();
}
public ResolutionCacheManager getResolutionCacheManager() {
return delegatedSettings.getResolutionCacheManager();
}
public DependencyResolver getResolver(ModuleRevisionId mRevId) {
return delegatedSettings.getResolver(mRevId);
}
public StatusManager getStatusManager() {
return delegatedSettings.getStatusManager();
}
public File resolveFile(String filename) {
return delegatedSettings.resolveFile(filename);
}
public String getDefaultBranch(ModuleId moduleId) {
return delegatedSettings.getDefaultBranch(moduleId);
}
public Namespace getContextNamespace() {
return delegatedSettings.getContextNamespace();
}
public Map substitute(Map strings) {
Map substituted = new LinkedHashMap();
for (Iterator it = strings.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
substituted.put(entry.getKey(), substitute((String) entry.getValue()));
}
return substituted;
}
public String substitute(String value) {
String r = delegatedSettings.substitute(value);
if (value != null && value != r) {
substitutes.put(value, r);
}
return r;
}
};
}