Examples of org.apache.jdo.model.java.JavaField

org.apache.jdo.model.java.JavaField
A JavaField instance represents a field declared by a class. It allows to get detailed information about the field such as name, modifiers, type, declaring class and the JDO meta data for the field (if available).
Different environments (runtime, enhancer, development) will have different JavaField implementations to provide answers to the various methods. @author Michael Bouschen @since JDO 1.0.1 @version JDO 2.0

        affirm(classPath);
        affirm(fieldName);
        final String className = classPath.replace('/', '.');
        try {
            final JavaType javaType = javaModel.getJavaType(className);
            final JavaField javaField = javaType.getJavaField(fieldName);
            final JavaType declaringClass = javaField.getDeclaringClass();
            return declaringClass.getName().replace('.', '/');
        } catch (ModelFatalException ex) {
            throw new EnhancerMetaDataUserException(ex);
        }
    }

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        try {
            final JDOClass clazz = getJDOClass(classPath);
            JavaType javaClass = clazz.getJavaType();
            affirm(javaClass != null,
                   "cannot find class file for class: " + classPath);
            JavaField javaField = javaClass.getJavaField(fieldName);
            affirm(javaField != null,
                   "cannot find java field " + classPath + "." + fieldName);
            JavaType fieldType = javaField.getType();
            JDOField field = clazz.getField(fieldName);
            // if field not known by JDOClass (not specified in JDO XML),
            // create the field only if the model's method of default
            // calculation would yield a persistent field.  We must not
            // change the models state by newly created fields with

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    /**
     * Get the JavaType representation of the type of the field.
     * @return JavaType representation of the type of this field.
     */
    public JavaType getType() {
        JavaField field = getJavaField();
        return (field == null) ? null : field.getType();
    }

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     * @return the JavaField instance for the specified field in this class
     * or <code>null</code> if there is no such field.
     */
    public JavaField getJavaField(String fieldName) 
    { 
        JavaField javaField = getDeclaredJavaField(fieldName);
        if (javaField == null) {
            // check superclass
            JavaType superclass = getSuperclass();
            if ((superclass != null) &&
                (superclass != PredefinedType.objectType)) {

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     * @param fieldName the name of the field 
     * @return the JavaField instance for the specified field in this class
     */
    public synchronized JavaField getDeclaredJavaField(String fieldName)
    {
        JavaField javaField = (JavaField)declaredJavaFields.get(fieldName);
        if (javaField == null) {
            JDOClass jdoClass = getJDOClass();
            if (jdoClass != null) {
                // pc class => look for JDOField first
                if (jdoClass.getDeclaredField(fieldName) != null) {

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        Field[] fields = ReflectionJavaField.getDeclaredFieldsPrivileged(clazz);
        for (int i = 0; i < fields.length; i++) {
            Field field = fields[i];
            String fieldName = field.getName();
            if (declaredJavaFields.get(fieldName) == null) {
                JavaField javaField = newJavaFieldInstance(field);
                declaredJavaFields.put(fieldName, javaField);
            }
        }
    }

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        affirm(classPath);
        affirm(fieldName);
        final String className = classPath.replace('/', '.');
        try {
            final JavaType javaType = javaModel.getJavaType(className);
            final JavaField javaField = javaType.getJavaField(fieldName);
            final JavaType declaringClass = javaField.getDeclaringClass();
            return declaringClass.getName().replace('.', '/');
        } catch (ModelFatalException ex) {
            throw new EnhancerMetaDataUserException(ex);
        }
    }

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        try {
            final JDOClass clazz = getJDOClass(classPath);
            JavaType javaClass = clazz.getJavaType();
            affirm(javaClass != null,
                   "cannot find class file for class: " + classPath);
            JavaField javaField = javaClass.getJavaField(fieldName);
            affirm(javaField != null,
                   "cannot find java field " + classPath + "." + fieldName);
            JavaType fieldType = javaField.getType();
            JDOField field = clazz.getField(fieldName);
            // if field not known by JDOClass (not specified in JDO XML),
            // create the field only if the model's method of default
            // calculation would yield a persistent field.  We must not
            // change the models state by newly created fields with

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     * @param fieldName the name of the field 
     * @return the JavaField instance for the specified field in this class
     */
    public synchronized JavaField getDeclaredJavaField(String fieldName)
    {
        JavaField javaField = (JavaField)declaredJavaFields.get(fieldName);
        if (javaField == null) {
            JDOClass jdoClass = getJDOClass();
            if (jdoClass != null) {
                // pc class => look for JDOField first
                if (jdoClass.getDeclaredField(fieldName) != null) {

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        Field[] fields = ReflectionJavaField.getDeclaredFieldsPrivileged(clazz);
        for (int i = 0; i < fields.length; i++) {
            Field field = fields[i];
            String fieldName = field.getName();
            if (declaredJavaFields.get(fieldName) == null) {
                JavaField javaField = newJavaFieldInstance(field);
                declaredJavaFields.put(fieldName, javaField);
            }
        }
    }

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