Java tutorial
package com.fasterxml.jackson.jaxrs.cfg; import com.fasterxml.jackson.databind.cfg.ConfigFeature; /** * Enumeration that defines simple on/off features that can be * used on all Jackson JAX-RS providers, regardless of * underlying data format. */ public enum JaxRSFeature implements ConfigFeature { /* /********************************************************** /* Input handling /********************************************************** */ /** * Feature related to * <a href="https://github.com/FasterXML/jackson-jaxrs-providers/issues/49">Issue #49</a>: * whether empty input is considered legal or not. * If set to true, empty content is allowed and will be read as Java 'null': if false, * an {@link java.io.IOException} will be thrown. *<p> * NOTE: in case of JAX-RS 2.0, specific exception will be <code>javax.ws.rs.core.NoContentException</code>; * but this is not defined in JAX-RS 1.x. */ ALLOW_EMPTY_INPUT(true), /* /********************************************************** /* HTTP headers /********************************************************** */ /** * Feature that can be enabled to make provider automatically * add "nosniff" (see * <a href="http://security.stackexchange.com/questions/20413/how-can-i-prevent-reflected-xss-in-my-json-web-services">this entry</a> * for details *<p> * Feature is disabled by default. */ ADD_NO_SNIFF_HEADER(false), /* /********************************************************** /* Caching, related /********************************************************** */ /** * Feature that may be enabled to force dynamic lookup of <code>ObjectMapper</code> * via JAX-RS Provider interface, regardless of whether <code>MapperConfigurator<code> * has explicitly configured mapper or not; if disabled, static configuration will * take precedence. * Note that if this feature is enabled, it typically makes sense to also disable * {@link JaxRSFeature#CACHE_ENDPOINT_READERS} and {@link JaxRSFeature#CACHE_ENDPOINT_WRITERS} * since caching would prevent lookups. *<p> * Feature is disabled by default. * * @since 2.8 */ DYNAMIC_OBJECT_MAPPER_LOOKUP(false), /** * [jaxrs-providers#86]: Feature that determines whether provider will cache endpoint * definitions for reading or not (including caching of actual <code>ObjectReader</code> to use). * Feature may be disabled if reconfiguration or alternate isntance of <code>ObjectMapper</code> is needed. *<p> * Note that disabling of the feature may add significant amount of overhead for processing. *<p> * Feature is enabled by default. * * @since 2.8 */ CACHE_ENDPOINT_READERS(true), /** * [jaxrs-providers#86]: Feature that determines whether provider will cache endpoint * definitions for writing or not (including caching of actual <code>ObjectWriter</code> to use). * Feature may be disabled if reconfiguration or alternate isntance of <code>ObjectMapper</code> is needed. *<p> * Note that disabling of the feature may add significant amount of overhead for processing. *<p> * Feature is enabled by default. * * @since 2.8 */ CACHE_ENDPOINT_WRITERS(true), /* /********************************************************** /* Other /********************************************************** */ ; private final boolean _defaultState; private JaxRSFeature(boolean defaultState) { _defaultState = defaultState; } public static int collectDefaults() { int flags = 0; for (JaxRSFeature f : values()) { if (f.enabledByDefault()) { flags |= f.getMask(); } } return flags; } @Override public boolean enabledByDefault() { return _defaultState; } @Override public int getMask() { return (1 << ordinal()); } @Override public boolean enabledIn(int flags) { return (flags & getMask()) != 0; } }