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vuk-nikolic/JsonActionInterceptor.java

Created February 1, 2012 10:00
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Revisions

  1. vuk-nikolic revised this gist Feb 1, 2012. 1 changed file with 4 additions and 7 deletions.
    11 changes: 4 additions & 7 deletions JsonActionInterceptor.java
    View file
    Original file line number Diff line number Diff line change
    @@ -94,6 +94,8 @@ private void addFieldValueToObject(Object action, Object fieldValues, Field fiel
    } else {
    // Most likely this is a POJO.
    Object fieldValue = getFieldValue(field.getName(), fieldValues);

    // TODO: "Number.class" part is a hack cause current Entity (hibernate) Id is marked as "extends Serializable", but the value is always a number.
    if (fieldValue.getClass().isPrimitive() || Number.class.isAssignableFrom(fieldValue.getClass())) {

    field.setAccessible(true);
    @@ -110,16 +112,11 @@ private void addFieldValueToObject(Object action, Object fieldValues, Field fiel
    }

    private Object getFieldValue(String fieldName, Object fieldValues) {
    if (fieldValues instanceof List) {
    List listFieldValue = (List) fieldValues;
    } else if (fieldValues instanceof Map) {
    if (fieldValues instanceof Map) {
    Map mapFieldValue = (Map) fieldValues;
    return mapFieldValue.get(fieldName);
    } else {
    // some primitive type?


    }

    return null;
    }

  2. vuk-nikolic revised this gist Feb 1, 2012. 1 changed file with 90 additions and 33 deletions.
    123 changes: 90 additions & 33 deletions JsonActionInterceptor.java
    View file
    Original file line number Diff line number Diff line change
    @@ -1,18 +1,22 @@
    package com.klopaj.interceptor;

    import com.klopaj.domain.Poi;
    import com.klopaj.interceptor.meta.JsonAction;
    import com.klopaj.interceptor.meta.JsonIn;
    import flexjson.JSONDeserializer;
    import flexjson.JSONSerializer;
    import jodd.bean.BeanUtil;
    import jodd.madvoc.ActionRequest;
    import jodd.madvoc.interceptor.ActionInterceptor;
    import jodd.servlet.ServletUtil;

    import javax.servlet.http.HttpServletRequest;
    import java.lang.reflect.Field;
    import java.lang.reflect.Method;
    import java.util.*;
    import java.lang.reflect.ParameterizedType;
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.List;
    import java.util.Map;


    public class JsonActionInterceptor extends ActionInterceptor {
    @@ -30,48 +34,79 @@ public Object intercept(ActionRequest actionRequest) throws Exception {
    String jsonStringValue = ServletUtil.readRequestBody(request);
    Object fieldValues = new JSONDeserializer<Object>().deserialize(jsonStringValue);

    Field[] fields = action.getClass().getDeclaredFields();
    List<Field> fields = getAllDeclaredFields(action.getClass());
    for (Field field : fields) {
    if (field != null) {
    if (field.isAnnotationPresent(JsonIn.class)) {
    // This field is marked as @JsonIn meaning it should be in the content of the response
    Class fieldType = field.getType();
    if (fieldType == String.class || fieldType.isPrimitive()) {
    // it's simple string, just try to get that value from json
    Object fieldValue = getFieldValue(field.getName(), fieldValues);
    field.setAccessible(true);
    field.set(action, fieldValue);
    } else if (fieldType.isArray()) {
    // Do some array magic
    } else if (fieldType.isEnum()) {
    // Convert value to enum
    } else if (List.class.isAssignableFrom(fieldType)) {
    // Handle lists and similar
    System.out.println("It's a collection");

    List fieldValue = (List) getFieldValue(field.getName(), fieldValues);
    field.setAccessible(true);
    field.set(action, fieldValue);
    for (Object object : fieldValue) {
    if (object != null) {
    System.out.println("Collection item " + object);
    addFieldValueToObject(action, fieldValues, field);
    }
    }
    }
    }

    return actionRequest.invoke();
    }

    private void addFieldValueToObject(Object action, Object fieldValues, Field field) throws IllegalAccessException, InstantiationException {
    Class fieldType = field.getType();
    if (fieldType == String.class || fieldType.isPrimitive() || Number.class.isAssignableFrom(fieldType)) {
    // it's simple string, just try to get that value from json
    Object fieldValue = getFieldValue(field.getName(), fieldValues);
    field.setAccessible(true);
    field.set(action, fieldValue);
    } else if (List.class.isAssignableFrom(fieldType)) {
    // Handle lists and similar
    System.out.println("It's a collection");

    List fieldValue = (List) getFieldValue(field.getName(), fieldValues);
    if (field.getGenericType() instanceof ParameterizedType) {
    ParameterizedType itemParameterizedType = (ParameterizedType) field.getGenericType();
    Class itemType = (Class) itemParameterizedType.getActualTypeArguments()[0];

    List result = new ArrayList();
    for (Object object : fieldValue) {
    if (object != null) {
    System.out.println("Collection item " + object);

    Object itemInstance = itemType.newInstance();

    // Object is most likely HashMap
    if (object instanceof Map) {
    Map<String, Object> objectAsMap = (Map<String, Object>) object;


    for (Field itemField : getAllDeclaredFields(itemInstance.getClass())) {
    if (objectAsMap.get(itemField.getName()) != null) {
    // we have that field's value
    addFieldValueToObject(itemInstance, objectAsMap, itemField);
    }
    }
    } else {
    // Most likely this is a POJO.
    Object fieldValue = getFieldValue(field.getName(), fieldValues);
    String objectSerialized = new JSONSerializer().exclude("*.class").serialize(fieldValue);

    Object fieldValueObject = new JSONDeserializer().deserialize(objectSerialized, fieldType);
    field.setAccessible(true);
    field.set(action, fieldValueObject);

    }

    result.add(itemInstance);
    }
    }

    BeanUtil.setDeclaredPropertyForced(action, field.getName(), result);
    }
    }
    } else {
    // Most likely this is a POJO.
    Object fieldValue = getFieldValue(field.getName(), fieldValues);
    if (fieldValue.getClass().isPrimitive() || Number.class.isAssignableFrom(fieldValue.getClass())) {

    return actionRequest.invoke();
    field.setAccessible(true);
    field.set(action, fieldValue);
    } else {
    String objectSerialized = new JSONSerializer().exclude("*.class").serialize(fieldValue);

    Object fieldValueObject = new JSONDeserializer().deserialize(objectSerialized, fieldType);
    field.setAccessible(true);
    field.set(action, fieldValueObject);
    }

    }
    }

    private Object getFieldValue(String fieldName, Object fieldValues) {
    @@ -87,4 +122,26 @@ private Object getFieldValue(String fieldName, Object fieldValues) {
    }
    return null;
    }

    /**
    * Returns all declared fields (including all supper classes' fields)
    *
    * @param type Class object that we need to get it's declared fields
    * @return List of Fields
    */
    public List<Field> getAllDeclaredFields(Class<?> type) {
    List<Field> result = new ArrayList<Field>();
    return getAllDeclaredFields(result, type);

    }

    private List<Field> getAllDeclaredFields(List<Field> fields, Class<?> type) {
    Collections.addAll(fields, type.getDeclaredFields());

    if (type.getSuperclass() != null) {
    fields = getAllDeclaredFields(fields, type.getSuperclass());
    }

    return fields;
    }
    }
  3. vuk-nikolic created this gist Feb 1, 2012.
    90 changes: 90 additions & 0 deletions JsonActionInterceptor.java
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,90 @@
    package com.klopaj.interceptor;

    import com.klopaj.domain.Poi;
    import com.klopaj.interceptor.meta.JsonAction;
    import com.klopaj.interceptor.meta.JsonIn;
    import flexjson.JSONDeserializer;
    import flexjson.JSONSerializer;
    import jodd.madvoc.ActionRequest;
    import jodd.madvoc.interceptor.ActionInterceptor;
    import jodd.servlet.ServletUtil;

    import javax.servlet.http.HttpServletRequest;
    import java.lang.reflect.Field;
    import java.lang.reflect.Method;
    import java.util.*;


    public class JsonActionInterceptor extends ActionInterceptor {
    @Override
    public Object intercept(ActionRequest actionRequest) throws Exception {
    HttpServletRequest request = actionRequest.getHttpServletRequest();


    Object action = actionRequest.getAction();
    Method method = actionRequest.getActionConfig().getActionClassMethod();

    if (method.isAnnotationPresent(JsonAction.class)) {
    // if this is a json action, get all @JsonIn fields, and try to parse them from input

    String jsonStringValue = ServletUtil.readRequestBody(request);
    Object fieldValues = new JSONDeserializer<Object>().deserialize(jsonStringValue);

    Field[] fields = action.getClass().getDeclaredFields();
    for (Field field : fields) {
    if (field != null) {
    if (field.isAnnotationPresent(JsonIn.class)) {
    // This field is marked as @JsonIn meaning it should be in the content of the response
    Class fieldType = field.getType();
    if (fieldType == String.class || fieldType.isPrimitive()) {
    // it's simple string, just try to get that value from json
    Object fieldValue = getFieldValue(field.getName(), fieldValues);
    field.setAccessible(true);
    field.set(action, fieldValue);
    } else if (fieldType.isArray()) {
    // Do some array magic
    } else if (fieldType.isEnum()) {
    // Convert value to enum
    } else if (List.class.isAssignableFrom(fieldType)) {
    // Handle lists and similar
    System.out.println("It's a collection");

    List fieldValue = (List) getFieldValue(field.getName(), fieldValues);
    field.setAccessible(true);
    field.set(action, fieldValue);
    for (Object object : fieldValue) {
    if (object != null) {
    System.out.println("Collection item " + object);
    }
    }
    } else {
    // Most likely this is a POJO.
    Object fieldValue = getFieldValue(field.getName(), fieldValues);
    String objectSerialized = new JSONSerializer().exclude("*.class").serialize(fieldValue);

    Object fieldValueObject = new JSONDeserializer().deserialize(objectSerialized, fieldType);
    field.setAccessible(true);
    field.set(action, fieldValueObject);
    }
    }
    }
    }
    }

    return actionRequest.invoke();
    }

    private Object getFieldValue(String fieldName, Object fieldValues) {
    if (fieldValues instanceof List) {
    List listFieldValue = (List) fieldValues;
    } else if (fieldValues instanceof Map) {
    Map mapFieldValue = (Map) fieldValues;
    return mapFieldValue.get(fieldName);
    } else {
    // some primitive type?


    }
    return null;
    }
    }