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137 lines
2.9 KiB
137 lines
2.9 KiB
package mightypork.gamecore.loading;
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import mightypork.gamecore.control.interf.Destroyable;
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import mightypork.utils.logging.Log;
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import mightypork.utils.logging.LoggedName;
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/**
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* Deferred resource abstraction.<br>
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* Resources implementing {@link NullResource} will be treated as fake and not
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* attempted to load.
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*
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* @author MightyPork
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*/
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@LoggedName(name = "Resource")
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public abstract class BaseDeferredResource implements DeferredResource, Destroyable {
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private final String resource;
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private boolean loadFailed = false;
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private boolean loadAttempted = false;
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public BaseDeferredResource(String resource) {
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this.resource = resource;
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}
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@Override
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public synchronized final void load()
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{
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if (loadAttempted) {
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Log.w("<RES> Already loaded @ load():\n " + this);
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(new IllegalStateException()).printStackTrace();
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//return;
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}
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loadAttempted = true;
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loadFailed = false;
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if (isNull()) return;
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try {
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if (resource == null) {
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throw new NullPointerException("Resource string cannot be null for non-null resource.");
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}
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Log.f3("<RES> Loading:\n " + this);
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loadResource(resource);
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Log.f3("<RES> Loaded:\n " + this);
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} catch (final Exception e) {
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loadFailed = true;
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Log.e("<RES> Failed to load:\n " + this, e);
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}
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}
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@Override
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public synchronized final boolean isLoaded()
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{
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if (isNull()) return false;
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return loadAttempted && !loadFailed;
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}
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/**
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* Check if the resource is loaded; if not, try to do so.
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*
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* @return true if it's loaded now.
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*/
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public synchronized final boolean ensureLoaded()
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{
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if (isNull()) return false;
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if (isLoaded()) {
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return true;
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} else {
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Log.w("<RES> First use, not loaded yet - loading directly\n " + this);
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(new IllegalStateException()).printStackTrace();
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load();
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}
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return isLoaded();
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}
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/**
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* Load the resource. Called from load() - once only.
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*
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* @param resource the path / name of a resource
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* @throws Exception when some problem prevented the resource from being
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* loaded.
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*/
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protected abstract void loadResource(String resource) throws Exception;
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@Override
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public abstract void destroy();
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@Override
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public String toString()
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{
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return Log.str(getClass()) + "(\"" + resource + "\")";
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}
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@Override
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public int hashCode()
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{
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final int prime = 31;
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int result = 1;
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result = prime * result + ((resource == null) ? 0 : resource.hashCode());
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return result;
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}
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@Override
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public boolean equals(Object obj)
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{
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if (this == obj) return true;
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if (obj == null) return false;
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if (!(obj instanceof BaseDeferredResource)) return false;
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final BaseDeferredResource other = (BaseDeferredResource) obj;
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if (resource == null) {
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if (other.resource != null) return false;
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} else if (!resource.equals(other.resource)) return false;
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return true;
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}
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private boolean isNull()
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{
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return this instanceof NullResource;
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}
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}
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