org.carrot2.workbench.editors.impl.EnumEditor.java Source code

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Here is the source code for org.carrot2.workbench.editors.impl.EnumEditor.java

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/*
 * Carrot2 project.
 *
 * Copyright (C) 2002-2015, Dawid Weiss, Stanisaw Osiski.
 * All rights reserved.
 *
 * Refer to the full license file "carrot2.LICENSE"
 * in the root folder of the repository checkout or at:
 * http://www.carrot2.org/carrot2.LICENSE
 */

package org.carrot2.workbench.editors.impl;

import java.util.ArrayList;
import java.util.Map;

import org.apache.commons.lang.ObjectUtils;
import org.carrot2.util.attribute.Required;
import org.carrot2.util.attribute.constraint.*;
import org.carrot2.workbench.editors.AttributeEditorInfo;

/**
 * Editor for mapped values (enumerated types and unrestricted strings with enum hints).
 */
public final class EnumEditor extends MappedValueComboEditor {
    /*
     * 
     */
    @SuppressWarnings("unchecked")
    @Override
    public AttributeEditorInfo init(Map<String, Object> defaultValues) {
        Class<? extends Enum<?>> clazz = (Class<? extends Enum<?>>) descriptor.type;
        if (clazz.isEnum()) {
            valueRequired = (descriptor.getAnnotation(Required.class) != null);
            anyValueAllowed = false;

            super.setMappedValues(ValueHintMappingUtils.getValueToFriendlyName(clazz),
                    new ArrayList<Object>(ValueHintMappingUtils.getValidValuesMap(clazz).keySet()));
        } else if (String.class.equals(clazz)) {
            final ValueHintEnum hint = descriptor.getAnnotation(ValueHintEnum.class);

            if (hint == null) {
                throw new IllegalArgumentException("Editor applicable to Strings with "
                        + ValueHintEnum.class.getName() + " annotation: " + descriptor);
            }

            clazz = hint.values();

            valueRequired = (descriptor.getAnnotation(Required.class) != null);
            anyValueAllowed = true;

            super.setMappedValues(ValueHintMappingUtils.getValueToFriendlyName(clazz),
                    new ArrayList<Object>(ValueHintMappingUtils.getValidValuesMap(clazz).keySet()));
        } else {
            throw new IllegalArgumentException("Attribute type not supported: " + descriptor);
        }

        return new AttributeEditorInfo(1, false);
    }

    /*
     * 
     */
    @Override
    public void setValue(Object newValue) {
        if (ObjectUtils.equals(newValue, getValue())) {
            return;
        }

        final String asString;
        if (newValue == null) {
            asString = null;
        } else if (newValue instanceof IValueHintMapping) {
            asString = ((IValueHintMapping) newValue).getAttributeValue();
        } else if (Enum.class.isInstance(newValue)) {
            asString = ((Enum<?>) newValue).name();
        } else {
            asString = newValue.toString();
        }

        super.setValue(asString);
    }
}