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VersionableAbstractPool.java
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VersionableAbstractPool.java
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/* $This file is distributed under the terms of the license in LICENSE$ */
package edu.cornell.mannlib.vitro.webapp.dynapi;
import java.util.Collection;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentSkipListMap;
import java.util.stream.Collectors;
import edu.cornell.mannlib.vitro.webapp.dynapi.components.Version;
import edu.cornell.mannlib.vitro.webapp.dynapi.components.Versionable;
import edu.cornell.mannlib.vitro.webapp.dynapi.components.Versioned;
public abstract class VersionableAbstractPool<K extends Versioned, C extends Versionable<K>, P extends Pool<K, C>>
extends AbstractPool<K, C, P> {
public Collection<C> getComponents(Version version) {
return getComponents().values().stream().filter(component -> nearestVersion(component, version)).collect(
Collectors.toMap(component -> component.getKey().getName(), component -> component, (l, r) -> {
Version left = l.getKey().getVersion();
Version right = r.getKey().getVersion();
if (left.compareTo(right) >= 0) {
return l;
}
return r;
}, ConcurrentSkipListMap::new)).values();
}
public C get(K key) {
C component = null;
Entry<K, C> entry = getComponents().floorEntry(key);
if (entry != null) {
component = entry.getValue();
String keyName = key.getName();
Version keyVersion = key.getVersion();
if (!matchesName(component, keyName) || !nearestVersion(component, keyVersion)) {
component = null;
}
}
if (component == null) {
return getDefault();
}
component.addClient();
return component;
}
private boolean matchesName(C component, String keyName) {
// ensure key name matches component key name
return keyName.equals(component.getKey().getName());
}
private boolean nearestVersion(C component, Version keyVersion) {
if (component.getKey().getVersion().getMajor() > keyVersion.getMajor()) {
return false;
}
boolean hasVersionMax = component.getVersionMax() != null;
boolean hasVersionMin = component.getVersionMin() != null;
if (hasVersionMax) {
// ensure key version is not greater than component version max
if (greaterThanVersionMax(component, keyVersion)) {
return false;
}
} else if (hasVersionMin) {
// ensure key version specific values are respected
if (mismatchSpecificVersion(component, keyVersion)) {
return false;
}
}
return true;
}
private boolean greaterThanVersionMax(C component, Version keyVersion) {
Version componentVersionMax = Version.of(component.getVersionMax());
boolean majorVersionGreater = keyVersion.getMajor().compareTo(componentVersionMax.getMajor()) > 0;
boolean minorVersionGreater = minorVersionSpecific(keyVersion) && keyVersion.getMinor().compareTo(
componentVersionMax.getMinor()) > 0;
boolean patchVersionGreater = patchVersionSpecific(keyVersion) && keyVersion.getPatch().compareTo(
componentVersionMax.getPatch()) > 0;
return majorVersionGreater || minorVersionGreater || patchVersionGreater;
}
private boolean mismatchSpecificVersion(C component, Version keyVersion) {
Version componentVersionMin = Version.of(component.getVersionMin());
boolean mismatchMinorVersion = minorVersionSpecific(keyVersion) && !keyVersion.getMinor().equals(
componentVersionMin.getMinor());
boolean mismatchPatchVersion = patchVersionSpecific(keyVersion) && !keyVersion.getPatch().equals(
componentVersionMin.getPatch());
return mismatchMinorVersion || mismatchPatchVersion;
}
private boolean minorVersionSpecific(Version keyVersion) {
return !keyVersion.getMinor().equals(Integer.MAX_VALUE);
}
private boolean patchVersionSpecific(Version keyVersion) {
return !keyVersion.getPatch().equals(Integer.MAX_VALUE);
}
}