--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2010 Association for Decentralized Information Management in\r
+ * Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.databoard.accessor.java;
+
+import java.lang.ref.SoftReference;\r
+import java.util.concurrent.Executor;\r
+\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.databoard.accessor.Accessor;\r
+import org.simantics.databoard.accessor.VariantAccessor;\r
+import org.simantics.databoard.accessor.error.AccessorConstructionException;\r
+import org.simantics.databoard.accessor.error.AccessorException;\r
+import org.simantics.databoard.accessor.error.ReferenceException;\r
+import org.simantics.databoard.accessor.event.Event;\r
+import org.simantics.databoard.accessor.event.ValueAssigned;\r
+import org.simantics.databoard.accessor.impl.AccessorParams;\r
+import org.simantics.databoard.accessor.impl.ListenerEntry;\r
+import org.simantics.databoard.accessor.interestset.InterestSet;\r
+import org.simantics.databoard.accessor.interestset.VariantInterestSet;\r
+import org.simantics.databoard.accessor.reference.ChildReference;\r
+import org.simantics.databoard.accessor.reference.ComponentReference;\r
+import org.simantics.databoard.accessor.reference.LabelReference;\r
+import org.simantics.databoard.adapter.AdaptException;\r
+import org.simantics.databoard.binding.ArrayBinding;\r
+import org.simantics.databoard.binding.Binding;\r
+import org.simantics.databoard.binding.RecordBinding;\r
+import org.simantics.databoard.binding.VariantBinding;\r
+import org.simantics.databoard.binding.error.BindingException;\r
+import org.simantics.databoard.binding.mutable.MutableVariant;\r
+import org.simantics.databoard.type.Datatype;\r
+import org.simantics.databoard.type.VariantType;\r
+
+public class JavaVariant extends JavaObject implements VariantAccessor {
+
+ SoftReference<JavaObject> child;
+
+ public JavaVariant(Accessor parent, VariantBinding binding, Object object, AccessorParams params) {
+ super(parent, binding, object, params);
+ }
+
+ @Override
+ public VariantType type() {
+ return (VariantType) binding.type();
+ }
+
+ @Override
+ public VariantBinding getBinding() {
+ return (VariantBinding) binding;
+ }
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public <T extends Accessor> T getContentAccessor() throws AccessorConstructionException {
+ try {
+ JavaObject sa = getExistingAccessor();
+ if (sa==null) \r
+ {\r
+ readLock();\r
+ try {
+ // Create new child
+ Binding cb = getBinding().getContentBinding(object);
+ Object cv = getBinding().getContent(object);
+ sa = JavaObject.createSubAccessor(this, cb, cv, params);
+ child = new SoftReference<JavaObject>(sa);
+
+ // Attach listeners of interest set to the new accessor (of the value)
+ ListenerEntry le = listeners;
+ while (le!=null) {
+ VariantInterestSet is = le.getInterestSet();
+ InterestSet cis = is.getComponentInterest();
+ if (cis != null) {
+ try {
+ ChildReference childPath = ChildReference.concatenate(le.path, new ComponentReference() );
+ sa.addListener(le.listener, cis, childPath, le.executor);
+ } catch (AccessorException e) {
+ throw new AccessorConstructionException(e);
+ }
+ }
+ if (is.inCompleteComponent()) {
+ cis = InterestSet.newInterestSet(getContentType(), true, true, true);
+ try {
+ ChildReference childPath = ChildReference.concatenate(le.path, new ComponentReference() );
+ sa.addListener(le.listener, cis, childPath, le.executor);
+ } catch (AccessorException e) {
+ throw new AccessorConstructionException(e);
+ }
+ }
+ le = le.next;
+ }
+ } finally {\r
+ readUnlock();\r
+ }
+ }
+ return (T) sa;
+ } catch (BindingException e) {
+ throw new AccessorConstructionException(e);
+ } catch (AccessorException e) {
+ throw new AccessorConstructionException(e);
+ }
+ }
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public <T extends Accessor> T getComponent(ChildReference reference)
+ throws AccessorConstructionException {
+ if (reference==null) return (T) this;\r
+ \r
+ if (reference instanceof LabelReference) {\r
+ LabelReference lr = (LabelReference) reference;\r
+ if (lr.label.equals("v")) {\r
+ Accessor sa = getContentAccessor();\r
+ if (reference.getChildReference()!=null) sa = sa.getComponent(reference.getChildReference());\r
+ return (T) sa;\r
+ } \r
+ } \r
+
+ if (reference instanceof ComponentReference) {\r
+ Accessor sa = getContentAccessor();\r
+ if (reference.getChildReference()!=null) sa = sa.getComponent(reference.getChildReference());\r
+ return (T) sa;\r
+ }\r
+
+ throw new ReferenceException("Variant value reference expected, got "+reference.getClass().getName());
+ }
+
+ protected JavaObject getExistingAccessor() {
+ SoftReference<JavaObject> r = child;
+ if (r==null) return null;
+ JavaObject sa = r.get();
+ return sa;
+ }
+
+ @Override
+ public void setValue(Binding variantBinding, Object newVariant)
+ throws AccessorException {\r
+ writeLock();
+ try {
+ if (binding instanceof VariantBinding == false)
+ throw new AccessorException("VariantBinding is expected.");\r
+ \r
+ Binding newValueBinding = ((VariantBinding)variantBinding).getContentBinding(newVariant);
+ Object newValueObject = ((VariantBinding)variantBinding).getContent(newVariant);
+ setContentValue(newValueBinding, newValueObject);
+ } catch (BindingException e) {
+ throw new AccessorException( e );
+ } finally {\r
+ writeUnlock();\r
+ }
+ }
+
+ @Override
+ public Object getContentValue(Binding contentBinding)
+ throws AccessorException {\r
+ readLock();
+ try {
+ return getBinding().getContent(object);
+ } catch (BindingException e) {
+ throw new AccessorException(e);
+ } finally {\r
+ readUnlock();\r
+ }
+ }
+
+ @Override
+ public Datatype getContentType() throws AccessorException {\r
+ readLock();
+ try {
+ return getBinding().getContentType(object);
+ } catch (BindingException e) {
+ throw new AccessorException(e);
+ } finally {\r
+ readUnlock();\r
+ }
+ }
+
+ @Override
+ public void setContentValue(Binding valueBinding, Object newValue)
+ throws AccessorException {\r
+ writeLock();
+ try {
+ // reuse sub-accessor, if type matches, and sub-accessor exists
+ JavaObject sa = getExistingAccessor();
+
+ if (sa!=null && valueBinding.type().equals(sa.type())) {
+ sa.setValue(valueBinding, newValue);
+ return;
+ }
+
+ {
+ // Replace the old value with a new value
+ if (sa!=null) {
+ sa.invalidatedNotification();
+ child = null;
+ sa = null;
+ }\r
+ \r
+ \r
+ if (binding.isImmutable() && parent!=null && parent instanceof JavaArray) {\r
+ JavaObject jo = (JavaObject) parent;\r
+ ArrayBinding ab = (ArrayBinding) jo.binding;\r
+ Object nv = getBinding().create(valueBinding, newValue);\r
+ ab.set(jo.object, (Integer)keyInParent, nv);\r
+ this.object = nv;\r
+ } else if (binding.isImmutable() && parent!=null && parent instanceof JavaRecord) {\r
+ JavaObject jo = (JavaObject) parent;\r
+ RecordBinding rb = (RecordBinding) jo.binding;\r
+ Object nv = getBinding().create(valueBinding, newValue);\r
+ rb.setComponent(jo.object, (Integer)keyInParent, nv);\r
+ this.object = nv;\r
+ } else if (binding.isImmutable() && parent!=null && parent instanceof JavaVariant) {\r
+ JavaObject jo = (JavaObject) parent;\r
+ VariantBinding vb = (VariantBinding) jo.binding;\r
+ Object nv = getBinding().create(valueBinding, newValue);\r
+ vb.setContent(jo.object, getBinding(), nv);\r
+ this.object = nv;\r
+ } else { \r
+ // Write new value\r
+ getBinding().setContent(object, valueBinding, newValue);\r
+ } \r
+
+
+ // Notify Listeners
+ ListenerEntry le = listeners;
+ while (le!=null) {
+ // Notification
+ VariantInterestSet is = le.getInterestSet();
+ if (is.inNotifications()) {\r
+ if (is.inValues()) {\r
+ MutableVariant value = new MutableVariant( valueBinding, valueBinding.isImmutable() ? newValue : valueBinding.clone(newValue) );\r
+ ValueAssigned e = new ValueAssigned(Bindings.MUTABLE_VARIANT, value );\r
+ emitEvent(le, e);\r
+ } else {\r
+ emitEvent( le, new ValueAssigned() ); \r
+ }
+ }
+
+ // Attach component listener
+// InterestSet cis = is.getComponentInterest();
+// if (cis!=null) {
+// sa = getValueAccessor();
+// }
+
+ le = le.next;
+ }
+
+ }
+ } catch (BindingException e) {
+ throw new AccessorException(e);
+// } catch (AccessorConstructionException e) {
+// throw new AccessorException(e);
+ } catch (AdaptException e) {
+ throw new AccessorException(e);
+ } finally {\r
+ writeUnlock();\r
+ }
+ }
+
+ @Override
+ public void addListener(Listener listener, InterestSet interestSet,
+ ChildReference path, Executor executor) throws AccessorException {
+ super.addListener(listener, interestSet, path, executor);
+ VariantInterestSet is = (VariantInterestSet) interestSet;
+ InterestSet cis = is.getComponentInterest();
+ if (cis==null && !is.inCompleteComponent()) return;
+ JavaObject sa = getExistingAccessor();
+ if (sa==null) return;
+ if (cis!=null) {
+ ChildReference childPath = ChildReference.concatenate(path, new ComponentReference() );
+ sa.addListener(listener, cis, childPath, executor);
+ }
+ if (is.inCompleteComponent()) {
+ ChildReference childPath = ChildReference.concatenate(path, new ComponentReference() );
+ cis = InterestSet.newInterestSet(getContentType(), true, true, true);
+ sa.addListener(listener, cis, childPath, executor);
+ }
+ }
+
+ @Override
+ public void removeListener(Listener listener) throws AccessorException {
+ ListenerEntry e = detachListener(listener);
+ if (e==null) return;
+ VariantInterestSet is = (VariantInterestSet) e.interestSet;
+
+ InterestSet cis = is.getComponentInterest();
+ if (cis==null && !is.inCompleteComponent()) return;
+ JavaObject sa = getExistingAccessor();
+ if (sa==null) return;
+ if (cis!=null) {
+ sa.removeListener(listener);
+ }
+ // Remove another?
+ if (is.inCompleteComponent()) {
+ sa.removeListener(listener);
+ }
+ }
+
+
+ @Override
+ Event applyLocal(Event e, boolean makeRollback) throws AccessorException {
+ try {
+ Event rollback = null;
+ if (e instanceof ValueAssigned) {
+ ValueAssigned va = (ValueAssigned) e;
+ if (va.newValue==null) throw new AccessorException("Cannot apply variant assignment event, the value is missing");
+
+ if (makeRollback) {
+ Binding cb = getBinding().getContentBinding(object);
+ Object cv = getBinding().getContent(object);
+ rollback = new ValueAssigned( Bindings.MUTABLE_VARIANT, new MutableVariant( cb, cv ) );
+ }
+ \r
+ setValue(va.newValue.getBinding(), va.newValue.getValue());
+// setContentValue(va.newValue.getBinding(), va.newValue.getValue());
+
+ return rollback;\r
+ } else {\r
+ throw new AccessorException("Invalid event "+e.getClass().getName());\r
+ }
+ } catch (BindingException be) {
+ throw new AccessorException(be);
+ }
+ }
+
+}
+
Code Review / simantics / platform.git / blobdiff