public void setProperty()

in src/main/java/org/apache/commons/beanutils2/BeanUtilsBean.java [914:1074]
150 lines of code
48 McCabe index (conditional complexity)

    public void setProperty(final Object bean, String name, final Object value)
        throws IllegalAccessException, InvocationTargetException {
        // Trace logging (if enabled)
        if (LOG.isTraceEnabled()) {
            final StringBuilder sb = new StringBuilder("  setProperty(");
            sb.append(bean);
            sb.append(", ");
            sb.append(name);
            sb.append(", ");
            if (value == null) {
                sb.append("<NULL>");
            } else if (value instanceof String) {
                sb.append((String) value);
            } else if (value instanceof String[]) {
                final String[] values = (String[]) value;
                sb.append('[');
                for (int i = 0; i < values.length; i++) {
                    if (i > 0) {
                        sb.append(',');
                    }
                    sb.append(values[i]);
                }
                sb.append(']');
            } else {
                sb.append(value.toString());
            }
            sb.append(')');
            LOG.trace(sb.toString());
        }

        // Resolve any nested expression to get the actual target bean
        Object target = bean;
        final Resolver resolver = getPropertyUtils().getResolver();
        while (resolver.hasNested(name)) {
            try {
                target = getPropertyUtils().getProperty(target, resolver.next(name));
                if (target == null) { // the value of a nested property is null
                    return;
                }
                name = resolver.remove(name);
            } catch (final NoSuchMethodException e) {
                return; // Skip this property setter
            }
        }
        if (LOG.isTraceEnabled()) {
            LOG.trace("    Target bean = " + target);
            LOG.trace("    Target name = " + name);
        }

        // Declare local variables we will require
        final String propName = resolver.getProperty(name); // Simple name of target property
        Class<?> type = null;                         // Java type of target property
        final int index  = resolver.getIndex(name);         // Indexed subscript value (if any)
        final String key = resolver.getKey(name);           // Mapped key value (if any)

        // Calculate the property type
        if (target instanceof DynaBean) {
            final DynaClass dynaClass = ((DynaBean) target).getDynaClass();
            final DynaProperty dynaProperty = dynaClass.getDynaProperty(propName);
            if (dynaProperty == null) {
                return; // Skip this property setter
            }
            type = dynaPropertyType(dynaProperty, value);
            if (index >= 0 && List.class.isAssignableFrom(type)) {
                type = Object.class;
            }
        } else if (target instanceof Map) {
            type = Object.class;
        } else if (target != null && target.getClass().isArray() && index >= 0) {
            type = Array.get(target, index).getClass();
        } else {
            PropertyDescriptor descriptor = null;
            try {
                descriptor =
                    getPropertyUtils().getPropertyDescriptor(target, name);
                if (descriptor == null) {
                    return; // Skip this property setter
                }
            } catch (final NoSuchMethodException e) {
                return; // Skip this property setter
            }
            if (descriptor instanceof MappedPropertyDescriptor) {
                if (((MappedPropertyDescriptor) descriptor).getMappedWriteMethod() == null) {
                    if (LOG.isDebugEnabled()) {
                        LOG.debug("Skipping read-only property");
                    }
                    return; // Read-only, skip this property setter
                }
                type = ((MappedPropertyDescriptor) descriptor).
                    getMappedPropertyType();
            } else if (index >= 0 && descriptor instanceof IndexedPropertyDescriptor) {
                if (((IndexedPropertyDescriptor) descriptor).getIndexedWriteMethod() == null) {
                    if (LOG.isDebugEnabled()) {
                        LOG.debug("Skipping read-only property");
                    }
                    return; // Read-only, skip this property setter
                }
                type = ((IndexedPropertyDescriptor) descriptor).
                    getIndexedPropertyType();
            } else if (index >= 0 && List.class.isAssignableFrom(descriptor.getPropertyType())) {
                type = Object.class;
            } else if (key != null) {
                if (descriptor.getReadMethod() == null) {
                    if (LOG.isDebugEnabled()) {
                        LOG.debug("Skipping read-only property");
                    }
                    return; // Read-only, skip this property setter
                }
                type = value == null ? Object.class : value.getClass();
            } else {
                if (descriptor.getWriteMethod() == null) {
                    if (LOG.isDebugEnabled()) {
                        LOG.debug("Skipping read-only property");
                    }
                    return; // Read-only, skip this property setter
                }
                type = descriptor.getPropertyType();
            }
        }

        // Convert the specified value to the required type
        Object newValue = null;
        if (type.isArray() && index < 0) { // Scalar value into array
            if (value == null) {
                final String[] values = new String[1];
                values[0] = null;
                newValue = getConvertUtils().convert(values, type);
            } else if (value instanceof String) {
                newValue = getConvertUtils().convert(value, type);
            } else if (value instanceof String[]) {
                newValue = getConvertUtils().convert((String[]) value, type);
            } else {
                newValue = convert(value, type);
            }
        } else if (type.isArray()) {         // Indexed value into array
            if (value instanceof String || value == null) {
                newValue = getConvertUtils().convert((String) value,
                                                type.getComponentType());
            } else if (value instanceof String[]) {
                newValue = getConvertUtils().convert(((String[]) value)[0],
                                                type.getComponentType());
            } else {
                newValue = convert(value, type.getComponentType());
            }
        } else if (value instanceof String) {
            newValue = getConvertUtils().convert((String) value, type);
        } else if (value instanceof String[]) {
            newValue = getConvertUtils().convert(((String[]) value)[0],
                                            type);
        } else {
            newValue = convert(value, type);
        }

        // Invoke the setter method
        try {
          getPropertyUtils().setProperty(target, name, newValue);
        } catch (final NoSuchMethodException e) {
            throw new InvocationTargetException
                (e, "Cannot set " + propName);
        }
    }