r/org.eclipse.statet.r.core/src/org/eclipse/statet/internal/r/core/sourcemodel/RSourceFileElement.java

/*=============================================================================#
 # Copyright (c) 2008, 2019 Stephan Wahlbrink and others.
 # 
 # This program and the accompanying materials are made available under the
 # terms of the Eclipse Public License 2.0 which is available at
 # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 # which is available at https://www.apache.org/licenses/LICENSE-2.0.
 # 
 # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 # 
 # Contributors:
 #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.internal.r.core.sourcemodel;

import java.util.List;

import org.eclipse.statet.jcommons.text.core.TextRegion;

import org.eclipse.statet.ltk.core.ElementName;
import org.eclipse.statet.ltk.model.core.elements.IModelElement;
import org.eclipse.statet.ltk.model.core.elements.ISourceStructElement;
import org.eclipse.statet.ltk.model.core.elements.ISourceUnitModelInfo;
import org.eclipse.statet.r.core.model.IRElement;
import org.eclipse.statet.r.core.model.IRFrame;
import org.eclipse.statet.r.core.model.IRLangSourceElement;
import org.eclipse.statet.r.core.model.IRSourceUnit;
import org.eclipse.statet.r.core.model.RElementName;
import org.eclipse.statet.r.core.model.RModel;


abstract class RSourceFileElement implements IRLangSourceElement {
	
	
	private final IRSourceUnit sourceUnit;
	
	protected final BuildSourceFrame envir;
	
	
	public RSourceFileElement(final IRSourceUnit su, final BuildSourceFrame envir) {
		this.sourceUnit= su;
		this.envir= envir;
	}
	
	
	@Override
	public final String getModelTypeId() {
		return RModel.R_TYPE_ID;
	}
	
	@Override
	public int getElementType() {
		return IModelElement.C2_SOURCE_FILE;
	}
	
	@Override
	public RElementName getElementName() {
		final ElementName elementName= this.sourceUnit.getElementName();
		if (elementName instanceof RElementName) {
			return (RElementName) elementName;
		}
		return RElementName.create(RElementName.RESOURCE, elementName.getSegmentName());
	}
	
	@Override
	public String getId() {
		return this.sourceUnit.getId();
	}
	
	@Override
	public boolean exists() {
		final ISourceUnitModelInfo modelInfo= getSourceUnit().getModelInfo(RModel.R_TYPE_ID, 0, null);
		return (modelInfo != null && modelInfo.getSourceElement() == this);
	}
	
	@Override
	public boolean isReadOnly() {
		return this.sourceUnit.isReadOnly();
	}
	
	
	@Override
	public IRElement getModelParent() {
		return null;
	}
	
	@Override
	public boolean hasModelChildren(final Filter filter) {
		return false;
	}
	
	@Override
	public List<? extends IRLangSourceElement> getModelChildren(final Filter filter) {
		return null;
	}
	
	@Override
	public ISourceStructElement getSourceParent() {
		return null;
	}
	
	@Override
	public IRSourceUnit getSourceUnit() {
		return this.sourceUnit;
	}
	
	
	@Override
	public TextRegion getNameSourceRange() {
		return null;
	}
	
	@Override
	public TextRegion getDocumentationRange() {
		return null;
	}
	
	
	@Override
	@SuppressWarnings("unchecked")
	public <T> T getAdapter(final Class<T> adapterType) {
		if (adapterType == IRFrame.class) {
			return (T) this.envir;
		}
		return null;
	}
	
	@Override
	public int hashCode() {
		return this.sourceUnit.hashCode();
	}
	
	@Override
	public boolean equals(final Object obj) {
		if (!(obj instanceof ISourceStructElement)) {
			return false;
		}
		final ISourceStructElement other= (ISourceStructElement) obj;
		return ((other.getElementType() & IModelElement.MASK_C2) == IModelElement.C2_SOURCE_FILE)
				&& this.sourceUnit.equals(other.getSourceUnit());
	}
	
}