org.eclipse.xtext.validation.FeatureBasedDiagnostic.java Source code

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Here is the source code for org.eclipse.xtext.validation.FeatureBasedDiagnostic.java

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/*******************************************************************************
 * Copyright (c) 2011 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.xtext.validation;

import java.util.List;

import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;

import com.google.common.collect.Lists;

/**
 * A diagnostic that is typically associated with a feature.
 */
public class FeatureBasedDiagnostic extends AbstractValidationDiagnostic {

    private final EStructuralFeature feature;
    private final int index;

    /**
     * @param issueData optional user data. May not contain <code>null</code> entries.
     */
    public FeatureBasedDiagnostic(int severity, String message, EObject source, EStructuralFeature feature,
            int index, CheckType checkType, String issueCode, String... issueData) {
        super(severity, message, source, checkType, issueCode, issueData);
        if (feature != null && source != null) {
            if (source.eClass().getEStructuralFeature(feature.getName()) != feature) {
                throw new IllegalArgumentException(
                        "The sources EClass '" + source.eClass().getName() + "' does not expose the feature '"
                                + feature.getEContainingClass().getName() + "." + feature.getName() + "'");
            }
        }
        this.feature = feature;
        this.index = index;
    }

    @Override
    public List<?> getData() {
        List<Object> result = Lists.newArrayListWithExpectedSize(3);
        result.add(getSourceEObject());
        if (feature != null) {
            result.add(feature);
            result.add(index);
        }
        if (getIssueData() != null) {
            result.add(getIssueData());
        }
        return result;
    }

    public EStructuralFeature getFeature() {
        return feature;
    }

    public int getIndex() {
        return index;
    }

    @Override
    public String toString() {
        StringBuilder result = new StringBuilder(super.toString());
        if (getSourceEObject() != null && feature != null) {
            result.append(".");
            result.append(feature.getName());
            if (!feature.isMany()) {
                if (feature instanceof EAttribute) {
                    result.append("==\"");
                    result.append(getSourceEObject().eGet(feature));
                    result.append("\"");
                } else {
                    EObject value = (EObject) getSourceEObject().eGet(feature);
                    result.append("==(");
                    if (value == null) {
                        result.append("null");
                    } else {
                        result.append("(instanceof ");
                        result.append(value.eClass().getName());
                        result.append(": ").append(value);
                    }
                    result.append(")");

                }
            } else if (index != ValidationMessageAcceptor.INSIGNIFICANT_INDEX) {
                result.append("#").append(index);
                List<?> list = (List<?>) getSourceEObject().eGet(feature);
                Object value = list.get(index);
                if (feature instanceof EAttribute) {
                    result.append("==\"");
                    result.append(value);
                    result.append("\"");
                } else {
                    EObject eObject = (EObject) value;
                    result.append("==(");
                    if (value == null) {
                        result.append("null");
                    } else {
                        result.append("(instanceof ");
                        result.append(eObject.eClass().getName());
                        result.append(": ").append(eObject);
                    }
                    result.append(")");
                }
            }
        }
        return result.toString();
    }

}