NumberFieldWidgetMaker.java

/**
 *    Copyright 2017 ICF Olson
 *
 *    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.
 */
package com.citytechinc.cq.component.touchuidialog.widget.numberfield;

import org.codehaus.plexus.util.StringUtils;

import com.citytechinc.cq.component.annotations.widgets.NumberField;
import com.citytechinc.cq.component.maven.util.LogSingleton;
import com.citytechinc.cq.component.touchuidialog.TouchUIDialogElement;
import com.citytechinc.cq.component.touchuidialog.widget.maker.AbstractTouchUIWidgetMaker;
import com.citytechinc.cq.component.touchuidialog.widget.maker.TouchUIWidgetMakerParameters;

public class NumberFieldWidgetMaker extends AbstractTouchUIWidgetMaker<NumberFieldWidgetParameters> {

	public NumberFieldWidgetMaker(TouchUIWidgetMakerParameters parameters) {
		super(parameters);
	}

	@Override
	public TouchUIDialogElement make(NumberFieldWidgetParameters widgetParameters) throws ClassNotFoundException {
		// Number field specific stuff
		NumberField numberField = getAnnotation(NumberField.class);

		widgetParameters.setMin(getMinForField(numberField));
		widgetParameters.setMax(getMaxForField(numberField));
		widgetParameters.setStep(getStepForField(numberField));

		return new NumberFieldWidget(widgetParameters);
	}

	protected Double getMinForField(NumberField annotation) {
		String potentialMin = annotation.min();

		if (StringUtils.isNotBlank(potentialMin)) {
			return Double.valueOf(potentialMin);
		}

		if (!annotation.allowNegative()) {
			return 0.0;
		}

		return null;
	}

	protected Double getMaxForField(NumberField annotation) {
		String potentialMax = annotation.max();

		if (StringUtils.isNotBlank(potentialMax)) {
			return Double.valueOf(potentialMax);
		}

		return null;
	}

	protected Double getStepForField(NumberField annotation) {
		Double step = annotation.step();

		if (Math.floor(step) != step && !Double.isInfinite(step)) {
			LogSingleton
				.getInstance()
				.warn(
					"A step of "
						+ annotation.step()
						+ " was defined for field "
						+ getFieldNameForField()
						+ " of class "
						+ parameters.getContainingClass().getName()
						+ ". Non-integer steps will cause the increment and decrement buttons of the number field to misbehave.");
		}
		return step;
	}
}