com.googlecode.blaisemath.firestarter.editor.IndexedPropertyEditor Maven / Gradle / Ivy

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package com.googlecode.blaisemath.firestarter.editor;

/*
 * #%L
 * Firestarter
 * --
 * Copyright (C) 2009 - 2022 Elisha Peterson
 * --
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import java.beans.PropertyEditor;
import java.lang.reflect.Array;

/**
 * Provides string-based editing of indexed properties, as long as the
 * underlying data type supports the {@link #getAsText()} and {@link #setAsText(java.lang.String)}
 * methods. Commas are used for splitting, so the strings must not use commas.
 *
 * @author Elisha Peterson
 */
public class IndexedPropertyEditor extends MPropertyEditorSupport {

    /** The editor that handles individual components of the array. */
    private PropertyEditor baseEditor;

    public IndexedPropertyEditor() {
        setValue(new Object[0]);
    }

    /** @return component type of the underlying array. */
    public Class getComponentType() {
        Object[] array = (Object[]) getValue();
        return array.getClass().getComponentType();
    }

    @Override
    protected void initEditorValue() {
        Object[] array = (Object[]) getValue();
        baseEditor = EditorRegistration.getRegisteredEditor(getComponentType());
        if (array.length > 0) {
            baseEditor.setValue(array[0]);
        }
    }

    @Override
    public String getAsText() {
        Object[] array = (Object[]) getValue();
        StringBuilder result = new StringBuilder();
        for (int i = 0; i < array.length; i++) {
            baseEditor.setValue(array[i]);
            result.append(i == 0 ? "" : ", ").append(baseEditor.getAsText());
        }
        return result.toString();
    }

    @Override
    public void setAsText(String text) {
        setAsText(text.split(","));
    }

    private void setAsText(String... splits) {
        Object[] result = (Object[]) Array.newInstance(getComponentType(), splits.length);
        for (int i = 0; i < result.length; i++) {
            baseEditor.setAsText(splits[i]);
            result[i] = baseEditor.getValue();
        }
        setValue(result);
    }
}