X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.browsing.ui.common%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fcommon%2Finternal%2FGECache.java;fp=bundles%2Forg.simantics.browsing.ui.common%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fcommon%2Finternal%2FGECache.java;h=ac911a458fe0dedf99fb5e376f078748e88eb657;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08 diff --git a/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/internal/GECache.java b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/internal/GECache.java new file mode 100644 index 000000000..ac911a458 --- /dev/null +++ b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/internal/GECache.java @@ -0,0 +1,198 @@ +/******************************************************************************* + * Copyright (c) 2007, 2010 Association for Decentralized Information Management + * in Industry THTH ry. + * All rights reserved. This program and the accompanying materials + * are made available under the terms of the Eclipse Public License v1.0 + * which accompanies this distribution, and is available at + * http://www.eclipse.org/legal/epl-v10.html + * + * Contributors: + * VTT Technical Research Centre of Finland - initial API and implementation + *******************************************************************************/ +package org.simantics.browsing.ui.common.internal; + +import gnu.trove.map.hash.THashMap; +import gnu.trove.map.hash.TObjectIntHashMap; +import gnu.trove.set.hash.THashSet; + +import java.util.Collections; +import java.util.Map; +import java.util.Set; + +import org.simantics.browsing.ui.NodeContext; +import org.simantics.browsing.ui.NodeContext.CacheKey; + +public class GECache implements IGECache { + + final Map entries = new THashMap(); + final Map> treeReferences = new THashMap>(); + + final private static class GECacheKey { + + private NodeContext context; + private CacheKey key; + + GECacheKey(NodeContext context, CacheKey key) { + this.context = context; + this.key = key; + if (context == null || key == null) + throw new IllegalArgumentException("Null context or key is not accepted"); + } + + GECacheKey(GECacheKey other) { + this.context = other.context; + this.key = other.key; + if (context == null || key == null) + throw new IllegalArgumentException("Null context or key is not accepted"); + } + + void setValues(NodeContext context, CacheKey key) { + this.context = context; + this.key = key; + if (context == null || key == null) + throw new IllegalArgumentException("Null context or key is not accepted"); + } + + @Override + public int hashCode() { + return context.hashCode() | key.hashCode(); + } + + @Override + public boolean equals(Object object) { + + if (this == object) + return true; + else if (object == null) + return false; +// else if (getClass() != object.getClass()) +// return false; + + GECacheKey i = (GECacheKey)object; + + return key.equals(i.key) && context.equals(i.context); + + } + + }; + + /** + * This single instance is used for all get operations from the cache. This + * should work since the GE cache is meant to be single-threaded within the + * current UI thread, what ever that thread is. For put operations which + * store the key, this is not used. + */ + NodeContext getNC = new NodeContext() { + @SuppressWarnings("rawtypes") + @Override + public Object getAdapter(Class adapter) { + return null; + } + + @Override + public T getConstant(ConstantKey key) { + return null; + } + + @Override + public Set> getKeys() { + return Collections.emptySet(); + } + }; + CacheKey getCK = new CacheKey() { + @Override + public Object processorIdenfitier() { + return this; + } + }; + GECacheKey getKey = new GECacheKey(getNC, getCK); + + public IGECacheEntry put(NodeContext context, CacheKey key, T value) { + IGECacheEntry entry = new GECacheEntry(context, key, value); + entries.put(new GECacheKey(context, key), entry); + return entry; + } + + @SuppressWarnings("unchecked") + public T get(NodeContext context, CacheKey key) { + getKey.setValues(context, key); + IGECacheEntry entry = entries.get(getKey); + if (entry == null) + return null; + return (T) entry.getValue(); + } + + @Override + public IGECacheEntry getEntry(NodeContext context, CacheKey key) { + assert(context != null); + assert(key != null); + getKey.setValues(context, key); + return entries.get(getKey); + } + + @Override + public void remove(NodeContext context, CacheKey key) { + getKey.setValues(context, key); + entries.remove(getKey); + } + + @Override + public Set getTreeReference(NodeContext context, CacheKey key) { + assert(context != null); + assert(key != null); + getKey.setValues(context, key); + return treeReferences.get(getKey); + } + + @Override + public void putTreeReference(NodeContext context, CacheKey key, UIElementReference reference) { + assert(context != null); + assert(key != null); + getKey.setValues(context, key); + Set refs = treeReferences.get(getKey); + if (refs != null) { + refs.add(reference); + } else { + refs = new THashSet(4); + refs.add(reference); + treeReferences.put(new GECacheKey(getKey), refs); + } + } + + @Override + public Set removeTreeReference(NodeContext context, CacheKey key) { + assert(context != null); + assert(key != null); + getKey.setValues(context, key); + return treeReferences.remove(getKey); + } + + @Override + public boolean isShown(NodeContext context) { + return references.get(context) > 0; + } + + private TObjectIntHashMap references = new TObjectIntHashMap(); + + @Override + public void incRef(NodeContext context) { + int exist = references.get(context); + references.put(context, exist+1); + } + + @Override + public void decRef(NodeContext context) { + int exist = references.get(context); + references.put(context, exist-1); + if(exist == 1) { + references.remove(context); + } + } + + public void dispose() { + references.clear(); + entries.clear(); + treeReferences.clear(); + } + +}