NumericFieldsProcessor.java
/*
* #%L
* wcm.io
* %%
* Copyright (C) 2014 wcm.io
* %%
* 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 io.wcm.caravan.io.jsontransform.processor;
import java.io.IOException;
import java.math.BigDecimal;
import java.util.Set;
import org.osgi.annotation.versioning.ProviderType;
import io.wcm.caravan.io.jsontransform.element.JsonElement;
import io.wcm.caravan.io.jsontransform.element.JsonElementType;
import io.wcm.caravan.io.jsontransform.source.Source;
/**
* Converts the values of JSON elements identified by key into {@link BigDecimal}s.
*/
@ProviderType
public final class NumericFieldsProcessor implements Processor {
private final Source source;
private final Set<String> numericFields;
/**
* @param source The source to get JSON stream elements from
* @param numericFields Name of fields having a numeric value
*/
public NumericFieldsProcessor(final Source source, final Set<String> numericFields) {
this.source = source;
this.numericFields = numericFields;
}
@Override
public boolean hasNext() {
return source.hasNext();
}
@Override
public JsonElement next() {
JsonElement next = source.next();
if (next != null && numericFields.contains(next.getKey()) && JsonElementType.VALUE.equals(next.getType())) {
return JsonElement.value(next.getKey(), new BigDecimal(next.getValue().toString()));
}
return next;
}
@Override
public void close() throws IOException {
source.close();
}
}