90 lines
2.8 KiB
Java
90 lines
2.8 KiB
Java
package eu.dnetlib.dhp.schema.oaf.utils;
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import java.lang.reflect.Field;
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import java.math.BigDecimal;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Iterator;
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import java.util.List;
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import static org.apache.commons.lang3.ClassUtils.isPrimitiveOrWrapper;
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public class MergeUtils3 {
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private final List<Object> selfObjects;
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private final Object source;
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private final Object target;
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private MergeUtils3(Object source, Object target) {
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this.source = source;
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this.target = target;
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this.selfObjects = new ArrayList<>();
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}
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public static MergeUtils3 mergerOf(Object source, Object target) {
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return new MergeUtils3(source, target);
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}
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public final void merge() {
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try {
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merge(source, target);
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} catch (IllegalAccessException | NoSuchFieldException e) {
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throw new RuntimeException("Merge error: ", e);
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}
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}
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private void merge(Object source, Object target) throws IllegalAccessException, NoSuchFieldException {
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selfObjects.add(source);
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Field[] declaredFields = source.getClass().getDeclaredFields();
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for (Field declaredField : declaredFields) {
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declaredField.setAccessible(true);
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Object fieldValue = declaredField.get(source);
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if (fieldValue == null || selfObjects.contains(fieldValue)) {
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continue;
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}
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Class<?> declaredFieldType = declaredField.getType();
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if (isJdkType(declaredField)) {
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Field targetField = target.getClass().getDeclaredField(declaredField.getName());
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targetField.setAccessible(true);
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targetField.set(target, fieldValue);
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continue;
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}
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if (Collection.class.isAssignableFrom(declaredFieldType)) {
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Iterable sourceCollection = (Iterable) declaredField.get(source);
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Iterable targetCollection = (Iterable) declaredField.get(target);
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merge(sourceCollection, targetCollection);
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continue;
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}
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merge(declaredField.get(source), declaredField.get(target));
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}
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}
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private boolean isJdkType(Field field) {
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Class<?> declaredFieldType = field.getType();
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String fieldTypeName = declaredFieldType.getName();
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return isPrimitiveOrWrapper(declaredFieldType)
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|| fieldTypeName.equals(String.class.getName())
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|| fieldTypeName.equals(BigDecimal.class.getName());
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}
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private void merge(Iterable source, Iterable target) throws NoSuchFieldException, IllegalAccessException {
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Iterator sourceIterator = source.iterator();
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Iterator targetIterator = target.iterator();
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while (sourceIterator.hasNext()) {
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merge(sourceIterator.next(), targetIterator.next());
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}
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}
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}
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