X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.databoard%2Fsrc%2Forg%2Fsimantics%2Fdataboard%2Fbinding%2Fmutable%2FImmutableVariantBinding.java;fp=bundles%2Forg.simantics.databoard%2Fsrc%2Forg%2Fsimantics%2Fdataboard%2Fbinding%2Fmutable%2FImmutableVariantBinding.java;h=3301c8da297e0c9922abb069a21159e425d0940d;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git diff --git a/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/mutable/ImmutableVariantBinding.java b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/mutable/ImmutableVariantBinding.java new file mode 100644 index 000000000..3301c8da2 --- /dev/null +++ b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/mutable/ImmutableVariantBinding.java @@ -0,0 +1,117 @@ +/******************************************************************************* + * Copyright (c) 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.databoard.binding.mutable; + +import java.util.Set; + +import org.simantics.databoard.adapter.AdaptException; +import org.simantics.databoard.adapter.AdapterFactory; +import org.simantics.databoard.binding.Binding; +import org.simantics.databoard.binding.VariantBinding; +import org.simantics.databoard.binding.error.BindingException; +import org.simantics.databoard.binding.reflection.ClassBindingFactory; +import org.simantics.databoard.type.Datatype; + +/** + * ImmutableVariantBinding binds VariantType to {@link Variant} Class. + */ +public class ImmutableVariantBinding extends VariantBinding { + + ClassBindingFactory bindingFactory; + AdapterFactory adapterFactory; + + public ImmutableVariantBinding(ClassBindingFactory bindingFactory, AdapterFactory adapterFactory) { + this.bindingFactory = bindingFactory; + this.adapterFactory = adapterFactory; + } + + @Override + public boolean isImmutable() { + return true; + } + + @Override + public Object create(Binding binding, Object value) throws BindingException { + return new Variant(binding, value); + } + + @Override + public Binding getContentBinding(Object variant) throws BindingException { + Variant result = (Variant) variant; + return result.binding; + } + + @Override + public Datatype getContentType(Object variant) throws BindingException { + Variant result = (Variant) variant; + return result.binding.type(); + } + + @Override + public Object getContent(Object variant, Binding binding) throws BindingException { + Variant var = (Variant) variant; + try { + Binding binding1 = var.binding; + Object value1 = var.value; + Binding binding2 = binding; + Object value2 = adapterFactory.adapt(value1, binding1, binding2); + return value2; + } catch (AdaptException e) { + throw new BindingException(e); + } + } + + public Object getContent(Object variant) throws BindingException { + Variant var = (Variant) variant; + return var.value; + } + + @Override + public void setContent(Object variant, Binding binding, Object value) + throws BindingException { + Variant var = (Variant) variant; + if (var.binding == binding && var.value==value) return; + throw new BindingException("Cannot write to immutable variant"); + } + + @Override + public void assertInstaceIsValid(Object obj, Set validInstances) throws BindingException { + if (obj==null) throw new BindingException("null value is not Variant"); + if (obj instanceof Variant == false) throw new BindingException("wrong class, Variant expected"); + Variant var = (Variant) obj; + if (var.binding==null) throw new BindingException("Binding is expected"); + var.binding.assertInstaceIsValid(var.value, validInstances); + } + + @Override + public boolean isInstance(Object obj) { + if (obj==null) return false; + if (obj instanceof Variant == false) return false; + return true; + } + + boolean isValid(Binding binding, Object obj) throws BindingException { + binding.assertInstaceIsValid(obj); + return true; + } + + @Override + public int baseHashCode() { + return super.baseHashCode() + 7 * adapterFactory.hashCode() + 13 * bindingFactory.hashCode(); + } + + @Override + protected boolean baseEquals(Object obj) { + ImmutableVariantBinding o = (ImmutableVariantBinding)obj; + return super.baseEquals(obj) && o.adapterFactory == adapterFactory && o.bindingFactory == bindingFactory; + } +}