com.adobe.acs.commons.images.transformers.impl.RotateImageTransformerImpl Maven / Gradle / Ivy
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Core ACS AEM Commons OSGi Bundle. Includes commons utilities.
/*
* #%L
* ACS AEM Commons Bundle
* %%
* Copyright (C) 2013 Adobe
* %%
* 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%
*/
package com.adobe.acs.commons.images.transformers.impl;
import com.adobe.acs.commons.images.ImageTransformer;
import com.day.image.Layer;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Properties;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Service;
import org.apache.sling.api.resource.ValueMap;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* ACS AEM Commons - Image Transformer - Rotate
*/
@Component
@Properties({
@Property(
name = ImageTransformer.PROP_TYPE,
value = RotateImageTransformerImpl.TYPE
)
})
@Service
public class RotateImageTransformerImpl implements ImageTransformer {
private static final Logger log = LoggerFactory.getLogger(RotateImageTransformerImpl.class);
static final String TYPE = "rotate";
private static final String KEY_DEGREES = "degrees";
private static final int TOTAL_DEGREES = 360;
@Override
public final Layer transform(final Layer layer, final ValueMap properties) {
if (properties == null || properties.isEmpty()) {
log.warn("Transform [ {} ] requires parameters.", TYPE);
return layer;
}
log.debug("Transforming with [ {} ]", TYPE);
int degrees = properties.get(KEY_DEGREES, 0) % TOTAL_DEGREES;
layer.rotate(degrees);
return layer;
}
}