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Cache the composite children that need encoding to improve performance

This commit is contained in:
David Maplesden 2019-09-10 12:41:16 +12:00 committed by James Agnew
parent 5120fe795e
commit 8b84b8ffea
1 changed files with 97 additions and 73 deletions
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168
hapi-fhir-base/src/main/java/ca/uhn/fhir/parser/BaseParser.java
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@ -68,6 +68,47 @@ public abstract class BaseParser implements IParser {
private boolean mySuppressNarratives;
private Set<String> myDontStripVersionsFromReferencesAtPaths;
private Map<Key, List<CompositeChildElement>> compositeChildrenCache = new HashMap<>();
private static class Key {
private final BaseRuntimeElementCompositeDefinition<?> resDef;
private final boolean theContainedResource;
private final CompositeChildElement theParent;
private final EncodeContext theEncodeContext;
public Key(BaseRuntimeElementCompositeDefinition<?> resDef, final boolean theContainedResource, final CompositeChildElement theParent, EncodeContext theEncodeContext) {
this.resDef = resDef;
this.theContainedResource = theContainedResource;
this.theParent = theParent;
this.theEncodeContext = theEncodeContext;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((resDef == null) ? 0 : resDef.hashCode());
result = prime * result + (theContainedResource ? 1231 : 1237);
result = prime * result + ((theParent == null) ? 0 : theParent.hashCode());
result = prime * result + ((theEncodeContext == null) ? 0 : theEncodeContext.hashCode());
return result;
}
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof Key) {
final Key that = (Key) obj;
return Objects.equals(this.resDef, that.resDef) &&
this.theContainedResource == that.theContainedResource &&
Objects.equals(this.theParent, that.theParent) &&
Objects.equals(this.theEncodeContext, that.theEncodeContext);
}
return false;
}
}
/**
* Constructor
*/
@ -129,85 +170,37 @@ public abstract class BaseParser implements IParser {
}
protected Iterable<CompositeChildElement> compositeChildIterator(IBase theCompositeElement, final boolean theContainedResource, final CompositeChildElement theParent, EncodeContext theEncodeContext) {
BaseRuntimeElementCompositeDefinition<?> elementDef = (BaseRuntimeElementCompositeDefinition<?>) myContext.getElementDefinition(theCompositeElement.getClass());
final List<BaseRuntimeChildDefinition> children = elementDef.getChildrenAndExtension();
return compositeChildrenCache.computeIfAbsent(new Key(elementDef, theContainedResource, theParent, theEncodeContext), (k) -> {
return new Iterable<BaseParser.CompositeChildElement>() {
final List<BaseRuntimeChildDefinition> children = elementDef.getChildrenAndExtension();
final List<CompositeChildElement> result = new ArrayList<>(children.size());
@Override
public Iterator<CompositeChildElement> iterator() {
for(final BaseRuntimeChildDefinition child: children) {
CompositeChildElement myNext = new CompositeChildElement(theParent, child, theEncodeContext);
return new Iterator<CompositeChildElement>() {
private Iterator<? extends BaseRuntimeChildDefinition> myChildrenIter;
private Boolean myHasNext = null;
private CompositeChildElement myNext;
/**
* Constructor
*/ {
myChildrenIter = children.iterator();
/*
* There are lots of reasons we might skip encoding a particular child
*/
if (myNext.getDef().getElementName().equals("id")) {
continue;
} else if (!myNext.shouldBeEncoded(theContainedResource)) {
continue;
} else if (myNext.getDef() instanceof RuntimeChildNarrativeDefinition) {
if (isSuppressNarratives() || isSummaryMode()) {
continue;
} else if (theContainedResource) {
continue;
}
@Override
public boolean hasNext() {
if (myHasNext != null) {
return myHasNext;
}
myNext = null;
do {
if (myChildrenIter.hasNext() == false) {
myHasNext = Boolean.FALSE;
return false;
}
myNext = new CompositeChildElement(theParent, myChildrenIter.next(), theEncodeContext);
/*
* There are lots of reasons we might skip encoding a particular child
*/
if (myNext.getDef().getElementName().equals("id")) {
myNext = null;
} else if (!myNext.shouldBeEncoded(theContainedResource)) {
myNext = null;
} else if (myNext.getDef() instanceof RuntimeChildNarrativeDefinition) {
if (isSuppressNarratives() || isSummaryMode()) {
myNext = null;
} else if (theContainedResource) {
myNext = null;
}
} else if (myNext.getDef() instanceof RuntimeChildContainedResources) {
if (theContainedResource) {
myNext = null;
}
}
} while (myNext == null);
myHasNext = true;
return true;
} else if (myNext.getDef() instanceof RuntimeChildContainedResources) {
if (theContainedResource) {
continue;
}
@Override
public CompositeChildElement next() {
if (myHasNext == null) {
if (!hasNext()) {
throw new IllegalStateException();
}
}
CompositeChildElement retVal = myNext;
myNext = null;
myHasNext = null;
return retVal;
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
};
}
result.add(myNext);
}
};
return result;
});
}
private void containResourcesForEncoding(ContainedResources theContained, IBaseResource theResource, IBaseResource theTarget) {
@ -1274,6 +1267,37 @@ public abstract class BaseParser implements IParser {
return retVal;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((myDef == null) ? 0 : myDef.hashCode());
result = prime * result + ((myParent == null) ? 0 : myParent.hashCode());
result = prime * result + ((myResDef == null) ? 0 : myResDef.hashCode());
result = prime * result + ((myEncodeContext == null) ? 0 : myEncodeContext.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj instanceof CompositeChildElement) {
final CompositeChildElement that = (CompositeChildElement) obj;
return Objects.equals(this.getEnclosingInstance(), that.getEnclosingInstance()) &&
Objects.equals(this.myDef, that.myDef) &&
Objects.equals(this.myParent, that.myParent) &&
Objects.equals(this.myResDef, that.myResDef) &&
Objects.equals(this.myEncodeContext, that.myEncodeContext);
}
return false;
}
private BaseParser getEnclosingInstance() {
return BaseParser.this;
}
}
protected class EncodeContextPath {