tools.vitruv.change.testutils.changevisualization.tree.decoder.echange.InsertRemoveDecoder Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of tools.vitruv.change.testutils.changevisualization Show documentation

Utilities for visualization changes on models

The newest version!

package tools.vitruv.change.testutils.changevisualization.tree.decoder.echange;

import java.util.Map;

import tools.vitruv.change.atomic.EChange;

/**
 * Decoder for eChanges with a insert or remove semantic
 * 
 * @author Andreas Loeffler
 */
public class InsertRemoveDecoder extends AbstractChangeDecoder {
	
	/*
	 * The maximum length of value-Strings to display
	 */
	private static final int MAX_LENGTH=60;
	
	/**
	 * The structural feature name holding the value to display
	 */
	private final String valueString;


	/**
	 * Creates a decoder for the given echange class and extracts the inserted/removed value
	 * from the feature named valueString
	 * 
	 * @param eClassName The eClass name
	 * @param valueString The structural features name holding the inserted/removed value
	 */
	public InsertRemoveDecoder(String eClassName, String valueString) {
		super(eClassName, new String[] {"affectedFeature","affectedEObject","affectedEObjectID",valueString});
		this.valueString=valueString;
	}

	@Override
	protected String generateString(EChange eChange, Map structuralFeatures2values) {
		
		//affectedFeature must exist
		if(!structuralFeatures2values.containsKey("affectedFeature")) {
			return null;
		}
		
		//one of affectedEObject or affectedEObjectID must exist
		if(!structuralFeatures2values.containsKey("affectedEObjectID")&&!structuralFeatures2values.containsKey("affectedEObject")) {
			return null;
		}

		//Extract newValue		
		String value=structuralFeatures2values.containsKey(valueString)?structuralFeatures2values.get(valueString).toString():"-";
		
		//value is sometimes really long, truncate it
		if(value!=null&&value.length()>MAX_LENGTH) {
			value=value.substring(0,MAX_LENGTH)+"...";
		}

		//Extract the entityName of the eObject
		String displayName=extractAffectedEObjectName(structuralFeatures2values);
		if(displayName==null) {
			//If name is not existent, i use the id
			displayName=NULL_STRING;
		}

		//extract the name of the eAttribute
		String eAttributeName=extractAffectedFeatureName(structuralFeatures2values);		
		if(eAttributeName==null) {
			eAttributeName=NULL_STRING;
		}

		//Create the result string
		return "\""+displayName+"\" / \""+eAttributeName+"\" : \""+value+"\"";
	}

}