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

/*=============================================================================#
 # Copyright (c) 2009, 2020 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.ast.core.AstNode;
import org.eclipse.statet.ltk.model.core.elements.ISourceStructElement;
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.RElementName;


public abstract class RChunkBuildElement implements IBuildSourceFrameElement {
	
	
	protected final ISourceStructElement parent;
	protected final AstNode node;
	
	protected final RElementName name;
	protected final TextRegion nameRegion;
	int occurrenceCount;
	
	BuildSourceFrame envir;
	List<? extends IRLangSourceElement> sourceChildrenProtected= RSourceElements.NO_R_SOURCE_CHILDREN;
	
	
	public RChunkBuildElement(final ISourceStructElement parent, final AstNode node,
			final RElementName name, final TextRegion nameRegion) {
		this.parent= parent;
		this.node= node;
		
		this.name= name;
		this.nameRegion= nameRegion;
	}
	
	
	@Override
	public void setSourceChildren(final List<? extends IRLangSourceElement> children) {
		this.sourceChildrenProtected= children;
	}
	
	@Override
	public BuildSourceFrame getBuildFrame() {
		return this.envir;
	}
	
	
	@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 this.parent;
	}
	
	@Override
	public boolean hasSourceChildren(final Filter filter) {
		return RSourceElements.hasChildren(this.sourceChildrenProtected, filter);
	}
	
	@Override
	public List<? extends IRLangSourceElement> getSourceChildren(final Filter filter) {
		return RSourceElements.getChildren(this.sourceChildrenProtected, filter);
	}
	
	
	@Override
	@SuppressWarnings("unchecked")
	public <T> T getAdapter(final Class<T> adapterType) {
		if (adapterType == IRFrame.class) {
			return (T) this.envir;
		}
		if (adapterType == AstNode.class) {
			return (T) this.node;
		}
		return null;
	}
	
	
	@Override
	public int hashCode() {
		return IRElement.C2_SOURCE_CHUNK * this.name.getSegmentName().hashCode() + this.occurrenceCount;
	}
	
	@Override
	public boolean equals(final Object obj) {
		final RChunkBuildElement other;
		return ( (obj instanceof RChunkBuildElement)
				&& this.occurrenceCount == (other= (RChunkBuildElement) obj).occurrenceCount
				&& this.name.equals(other.name) );
	}
	
}