PositionGetterFactory.java
- package com.gh.mygreen.xlsmapper.fieldaccessor;
- import java.awt.Point;
- import java.lang.reflect.Field;
- import java.lang.reflect.InvocationTargetException;
- import java.lang.reflect.Method;
- import java.lang.reflect.ParameterizedType;
- import java.util.Map;
- import java.util.Optional;
- import org.slf4j.Logger;
- import org.slf4j.LoggerFactory;
- import com.gh.mygreen.xlsmapper.util.ArgUtils;
- import com.gh.mygreen.xlsmapper.util.CellPosition;
- import com.gh.mygreen.xlsmapper.util.Utils;
- /**
- * {@link PositionGetter}のインスタンスを作成する
- *
- * @since 2.0
- * @author T.TSUCHIE
- *
- */
- public class PositionGetterFactory {
-
- private static final Logger log = LoggerFactory.getLogger(PositionGetterFactory.class);
-
- /**
- * フィールドの位置情報を取得するためのアクセッサを作成します。
- * @param beanClass フィールドが定義されているクラス情報
- * @param fieldName フィールドの名称
- * @return 位置情報のgetterが存在しない場合は空を返す。
- * @throws IllegalArgumentException {@literal beanClass == null or fieldName == null}
- * @throws IllegalArgumentException {@literal fieldName.isEmpty() = true}
- */
- public Optional<PositionGetter> create(final Class<?> beanClass, final String fieldName) {
-
- ArgUtils.notNull(beanClass, "beanClass");
- ArgUtils.notEmpty(fieldName, "fieldName");
-
- // フィールド Map positionsの場合
- Optional<PositionGetter> positionGetter = createMapField(beanClass, fieldName);
- if(positionGetter.isPresent()) {
- return positionGetter;
- }
-
- // setter メソッドの場合
- positionGetter = createMethod(beanClass, fieldName);
- if(positionGetter.isPresent()) {
- return positionGetter;
- }
-
- // フィールド + positionの場合
- positionGetter = createField(beanClass, fieldName);
- if(positionGetter.isPresent()) {
- return positionGetter;
- }
-
-
- return Optional.empty();
-
-
- }
-
- private Optional<PositionGetter> createMapField(final Class<?> beanClass, final String fieldName) {
-
- final Field positionsField;
- try {
- positionsField = beanClass.getDeclaredField("positions");
- positionsField.setAccessible(true);
-
- } catch (NoSuchFieldException | SecurityException e) {
- // フィールドが見つからない場合は、何もしない。
- return Optional.empty();
- }
-
- if(!Map.class.isAssignableFrom(positionsField.getType())) {
- return Optional.empty();
- }
-
- final ParameterizedType type = (ParameterizedType) positionsField.getGenericType();
- final Class<?> keyType = (Class<?>) type.getActualTypeArguments()[0];
- final Class<?> valueType = (Class<?>) type.getActualTypeArguments()[1];
-
- if(keyType.equals(String.class) && valueType.equals(CellPosition.class)) {
- return Optional.of(new PositionGetter() {
-
- @SuppressWarnings("unchecked")
- @Override
- public Optional<CellPosition> get(final Object beanObj) {
- ArgUtils.notNull(beanObj, "beanObj");
-
- try {
- Map<String, CellPosition> positionsMapObj = (Map<String, CellPosition>) positionsField.get(beanObj);
- if(positionsMapObj == null) {
- return Optional.empty();
- }
-
- return Optional.ofNullable(positionsMapObj.get(fieldName));
-
- } catch (IllegalArgumentException | IllegalAccessException e) {
- throw new RuntimeException("fail access positions field.", e);
- }
- }
- });
-
- } else if(keyType.equals(String.class) && valueType.equals(Point.class)) {
-
- return Optional.of(new PositionGetter() {
-
- @SuppressWarnings("unchecked")
- @Override
- public Optional<CellPosition> get(final Object beanObj) {
- ArgUtils.notNull(beanObj, "beanObj");
-
- try {
- Map<String, Point> positionsMapObj = (Map<String, Point>) positionsField.get(beanObj);
- if(positionsMapObj == null) {
- return Optional.empty();
- }
-
- return Optional.ofNullable(positionsMapObj.get(fieldName))
- .map(a -> CellPosition.of(a));
-
- } catch (IllegalArgumentException | IllegalAccessException e) {
- throw new RuntimeException("fail access positions field.", e);
- }
- }
- });
-
-
- } else if(keyType.equals(String.class) && valueType.equals(org.apache.poi.ss.util.CellAddress.class)) {
-
- return Optional.of(new PositionGetter() {
-
- @SuppressWarnings("unchecked")
- @Override
- public Optional<CellPosition> get(final Object beanObj) {
- ArgUtils.notNull(beanObj, "beanObj");
-
- try {
- Map<String, org.apache.poi.ss.util.CellAddress> positionsMapObj = (Map<String, org.apache.poi.ss.util.CellAddress>) positionsField.get(beanObj);
- if(positionsMapObj == null) {
- return Optional.empty();
- }
-
- return Optional.ofNullable(positionsMapObj.get(fieldName))
- .map(a -> CellPosition.of(a));
-
- } catch (IllegalArgumentException | IllegalAccessException e) {
- throw new RuntimeException("fail access positions field.", e);
- }
- }
- });
-
-
- } else {
- // タイプが一致しない場合
- log.warn("not match generics type of positions. key type:{}, value type:{}.", keyType.getName(), valueType.getName());
- return Optional.empty();
- }
-
- }
-
- private Optional<PositionGetter> createMethod(final Class<?> beanClass, final String fieldName) {
-
- final String positionMethodName = "get" + Utils.capitalize(fieldName) + "Position";
-
- final Method method;
- try {
- method = beanClass.getDeclaredMethod(positionMethodName);
- method.setAccessible(true);
-
- } catch (NoSuchMethodException | SecurityException e) {
- return Optional.empty();
- }
-
- if(method.getReturnType().equals(CellPosition.class)) {
- return Optional.of(new PositionGetter() {
-
- @Override
- public Optional<CellPosition> get(final Object beanObj) {
- ArgUtils.notNull(beanObj, "beanObj");
-
- try {
- final CellPosition address = (CellPosition)method.invoke(beanObj);
- return Optional.ofNullable(address);
-
- } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
- throw new RuntimeException("fail access positions getter method.", e);
- }
-
- }
- });
-
- } else if(method.getReturnType().equals(Point.class)) {
- return Optional.of(new PositionGetter() {
-
- @Override
- public Optional<CellPosition> get(final Object beanObj) {
- ArgUtils.notNull(beanObj, "beanObj");
-
- try {
- final Point point = (Point)method.invoke(beanObj);
- return Optional.ofNullable(point).map(p -> CellPosition.of(p));
-
- } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
- throw new RuntimeException("fail access positions getter method.", e);
- }
-
- }
- });
-
- } else if(method.getReturnType().equals(org.apache.poi.ss.util.CellAddress.class)) {
- return Optional.of(new PositionGetter() {
-
- @Override
- public Optional<CellPosition> get(final Object beanObj) {
- ArgUtils.notNull(beanObj, "beanObj");
-
- try {
- final org.apache.poi.ss.util.CellAddress address = (org.apache.poi.ss.util.CellAddress)method.invoke(beanObj);
- return Optional.ofNullable(address).map(a -> CellPosition.of(a));
-
- } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
- throw new RuntimeException("fail access positions getter method.", e);
- }
-
- }
- });
- }
-
- return Optional.empty();
-
- }
-
- private Optional<PositionGetter> createField(final Class<?> beanClass, final String fieldName) {
-
- final String positionFieldName = fieldName + "Position";
-
- final Field positionField;
- try {
- positionField = beanClass.getDeclaredField(positionFieldName);
- positionField.setAccessible(true);
-
- } catch (NoSuchFieldException | SecurityException e) {
- return Optional.empty();
- }
-
- if(positionField.getType().equals(CellPosition.class)) {
-
- return Optional.of(new PositionGetter() {
-
- @Override
- public Optional<CellPosition> get(final Object beanObj) {
- ArgUtils.notNull(beanObj, "beanObj");
-
- try {
- final CellPosition address = (CellPosition) positionField.get(beanObj);
- return Optional.ofNullable(address);
-
- } catch (IllegalArgumentException | IllegalAccessException e) {
- throw new RuntimeException("fail access position field.", e);
- }
- }
- });
-
- } else if(positionField.getType().equals(Point.class)) {
-
- return Optional.of(new PositionGetter() {
-
- @Override
- public Optional<CellPosition> get(final Object beanObj) {
- ArgUtils.notNull(beanObj, "beanObj");
-
- try {
- final Point point = (Point) positionField.get(beanObj);
- return Optional.ofNullable(point).map(p -> CellPosition.of(p));
-
- } catch (IllegalArgumentException | IllegalAccessException e) {
- throw new RuntimeException("fail access position field.", e);
- }
- }
- });
-
- } else if(positionField.getType().equals(org.apache.poi.ss.util.CellAddress.class)) {
-
- return Optional.of(new PositionGetter() {
-
- @Override
- public Optional<CellPosition> get(final Object beanObj) {
- ArgUtils.notNull(beanObj, "beanObj");
-
- try {
- final org.apache.poi.ss.util.CellAddress address = (org.apache.poi.ss.util.CellAddress) positionField.get(beanObj);
- return Optional.ofNullable(address).map(a -> CellPosition.of(a));
-
- } catch (IllegalArgumentException | IllegalAccessException e) {
- throw new RuntimeException("fail access position field.", e);
- }
- }
- });
-
- }
-
- return Optional.empty();
- }
-
- }