org.eclipse.xtend.core.jvmmodel.AnonymousClassUtil.java Source code

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Here is the source code for org.eclipse.xtend.core.jvmmodel.AnonymousClassUtil.java

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/*******************************************************************************
 * Copyright (c) 2014 itemis AG (http://www.itemis.eu) and others.
 * 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
 *******************************************************************************/
package org.eclipse.xtend.core.jvmmodel;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.xtend.core.xtend.AnonymousClass;
import org.eclipse.xtext.EcoreUtil2;
import org.eclipse.xtext.common.types.JvmConstructor;
import org.eclipse.xtext.common.types.JvmDeclaredType;
import org.eclipse.xtext.common.types.JvmGenericType;
import org.eclipse.xtext.common.types.JvmMember;
import org.eclipse.xtext.common.types.JvmType;
import org.eclipse.xtext.common.types.JvmTypeReference;
import org.eclipse.xtext.common.types.TypesPackage;
import org.eclipse.xtext.linking.impl.LinkingHelper;
import org.eclipse.xtext.linking.lazy.LazyURIEncoder;
import org.eclipse.xtext.naming.IQualifiedNameConverter;
import org.eclipse.xtext.naming.QualifiedName;
import org.eclipse.xtext.nodemodel.INode;
import org.eclipse.xtext.resource.IEObjectDescription;
import org.eclipse.xtext.scoping.IScope;
import org.eclipse.xtext.xbase.XConstructorCall;
import org.eclipse.xtext.xbase.XbasePackage;

import com.google.common.collect.Iterables;
import com.google.inject.Inject;

/**
 * @author Jan Koehnlein - Initial contribution and API
 */
public class AnonymousClassUtil {

    @Inject
    private IQualifiedNameConverter qualifiedNameConverter;

    @Inject
    private LazyURIEncoder uriEncoder;

    @Inject
    private LinkingHelper linkingHelper;

    public JvmDeclaredType getSuperTypeNonResolving(AnonymousClass anonymousClass, IScope typeScope) {
        XConstructorCall constructorCall = anonymousClass.getConstructorCall();
        EObject constructorProxy = (EObject) constructorCall
                .eGet(XbasePackage.Literals.XCONSTRUCTOR_CALL__CONSTRUCTOR, false);
        IEObjectDescription description = null;
        if (constructorProxy != null) {
            if (!constructorProxy.eIsProxy()) {
                return getSuperType(anonymousClass);
            }
            String fragment = EcoreUtil.getURI(constructorProxy).fragment();
            INode node = uriEncoder.getNode(constructorCall, fragment);
            String name = linkingHelper.getCrossRefNodeAsString(node, true);
            QualifiedName superTypeName = qualifiedNameConverter.toQualifiedName(name);
            description = typeScope.getSingleElement(superTypeName);
        }
        if (description == null
                || !EcoreUtil2.isAssignableFrom(TypesPackage.Literals.JVM_DECLARED_TYPE, description.getEClass())) {
            description = typeScope.getSingleElement(QualifiedName.create("java", "lang", "Object"));
        }
        if (description != null
                && EcoreUtil2.isAssignableFrom(TypesPackage.Literals.JVM_DECLARED_TYPE, description.getEClass())) {
            JvmDeclaredType type = (JvmDeclaredType) description.getEObjectOrProxy();
            if (!type.eIsProxy())
                return type;
            return (JvmDeclaredType) EcoreUtil.resolve(type, anonymousClass);
        }
        return null;
    }

    /* @Nullable */
    public JvmGenericType getSuperType(AnonymousClass anonymousClass) {
        JvmConstructor constructor = anonymousClass.getConstructorCall().getConstructor();
        if (constructor != null && !constructor.eIsProxy()) {
            JvmDeclaredType declaringType = constructor.getDeclaringType();
            JvmType superType = Iterables.getLast(declaringType.getSuperTypes()).getType();
            if (superType instanceof JvmGenericType)
                return (JvmGenericType) superType;
        }
        return null;
    }

    public JvmConstructor getSuperTypeConstructor(AnonymousClass anonymousClass) {
        JvmGenericType superType = getSuperType(anonymousClass);
        if (superType != null) {
            JvmConstructor constructor = anonymousClass.getConstructorCall().getConstructor();
            for (JvmMember superMember : superType.getMembers()) {
                if (superMember instanceof JvmConstructor
                        && isSameSignature(constructor, (JvmConstructor) superMember))
                    return (JvmConstructor) superMember;
            }
        }
        return null;
    }

    protected boolean isSameSignature(JvmConstructor constructor, JvmConstructor superConstructor) {
        if (constructor.getParameters().size() != superConstructor.getParameters().size())
            return false;
        for (int i = 0; i < constructor.getParameters().size(); ++i) {
            JvmTypeReference paramType = constructor.getParameters().get(i).getParameterType();
            JvmTypeReference superParamType = superConstructor.getParameters().get(i).getParameterType();
            if (!paramType.getIdentifier().equals(superParamType.getIdentifier()))
                return false;
        }
        return true;
    }
}