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-rw-r--r--utils/src/main/java/org/onap/policy/common/utils/properties/PropertyConfiguration.java61
1 files changed, 47 insertions, 14 deletions
diff --git a/utils/src/main/java/org/onap/policy/common/utils/properties/PropertyConfiguration.java b/utils/src/main/java/org/onap/policy/common/utils/properties/PropertyConfiguration.java
index 7253c746..e72ebaba 100644
--- a/utils/src/main/java/org/onap/policy/common/utils/properties/PropertyConfiguration.java
+++ b/utils/src/main/java/org/onap/policy/common/utils/properties/PropertyConfiguration.java
@@ -25,8 +25,11 @@ import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Properties;
+import org.apache.commons.lang3.StringUtils;
import org.onap.policy.common.utils.properties.exception.PropertyAccessException;
import org.onap.policy.common.utils.properties.exception.PropertyException;
import org.onap.policy.common.utils.properties.exception.PropertyInvalidException;
@@ -35,7 +38,9 @@ import org.onap.policy.common.utils.properties.exception.PropertyMissingExceptio
/**
* Configuration whose fields are initialized by reading from a set of {@link Properties},
* as directed by the {@link Property} annotations that appear on fields within the
- * subclass.
+ * subclass. The values of the fields are set via <i>setXxx()</i> methods. As a result, if
+ * a field is annotated and there is no corresponding <i>setXxx()</i> method, then an
+ * exception will be thrown.
* <p>
* It is possible that an invalid <i>defaultValue</i> is specified via the
* {@link Property} annotation. This could remain undetected until an optional property is
@@ -104,7 +109,10 @@ public class PropertyConfiguration {
checkModifiable(field, prop);
- if (setValue(field, props, prop)) {
+ Method setter = getSetter(field, prop);
+ checkSetter(setter, prop);
+
+ if (setValue(setter, field, props, prop)) {
return true;
}
@@ -112,15 +120,33 @@ public class PropertyConfiguration {
}
/**
+ * @param field field whose value is to be set
+ * @param prop property of interest
+ * @return the method to be used to set the field's value
+ * @throws PropertyAccessException if a "set" method cannot be identified
+ */
+ private Method getSetter(Field field, Property prop) throws PropertyAccessException {
+ String nm = "set" + StringUtils.capitalize(field.getName());
+
+ try {
+ return this.getClass().getMethod(nm, field.getType());
+
+ } catch (NoSuchMethodException | SecurityException e) {
+ throw new PropertyAccessException(prop.name(), nm, e);
+ }
+ }
+
+ /**
* Sets a field's value from a particular property.
*
+ * @param setter method to be used to set the field's value
* @param field field whose value is to be set
* @param props properties from which to get the value
* @param prop property of interest
* @return {@code true} if the property's value was set, {@code false} otherwise
* @throws PropertyException if an error occurs
*/
- protected boolean setValue(Field field, Properties props, Property prop) throws PropertyException {
+ protected boolean setValue(Method setter, Field field, Properties props, Property prop) throws PropertyException {
try {
Object val = getValue(field, props, prop);
@@ -128,23 +154,15 @@ public class PropertyConfiguration {
return false;
} else {
-
- /*
- * According to java docs & blogs, "field" is our own copy, so we're free
- * to change the flags without impacting the real permissions of the field
- * within the real class.
- */
- field.setAccessible(true);
-
- field.set(this, val);
+ setter.invoke(this, val);
return true;
}
} catch (IllegalArgumentException e) {
throw new PropertyInvalidException(prop.name(), field.getName(), e);
- } catch (IllegalAccessException e) {
- throw new PropertyAccessException(prop.name(), field.getName(), e);
+ } catch (IllegalAccessException | InvocationTargetException e) {
+ throw new PropertyAccessException(prop.name(), setter.getName(), e);
}
}
@@ -203,6 +221,21 @@ public class PropertyConfiguration {
}
/**
+ * Verifies that the setter method is not <i>static</i>.
+ *
+ * @param setter method to be checked
+ * @param prop property of interest
+ * @throws PropertyAccessException if the method is static
+ */
+ private void checkSetter(Method setter, Property prop) throws PropertyAccessException {
+ int mod = setter.getModifiers();
+
+ if (Modifier.isStatic(mod)) {
+ throw new PropertyAccessException(prop.name(), setter.getName(), "method is 'static'");
+ }
+ }
+
+ /**
* Gets a property value, coercing it to a String.
*
* @param fieldName field whose value is to be set