package com.fasterxml.jackson.databind.introspect; import java.lang.reflect.*; import com.fasterxml.jackson.databind.JavaType; import com.fasterxml.jackson.databind.util.ClassUtil; public final class AnnotatedMethod extends AnnotatedWithParams implements java.io.Serializable { private static final long serialVersionUID = 1L; final protected transient Method _method; // // Simple lazy-caching: protected Class<?>[] _paramClasses; /** * Field that is used to make JDK serialization work with this * object. * * @since 2.1 */ protected Serialization _serialization; /* /***************************************************** /* Life-cycle /***************************************************** */ public AnnotatedMethod(TypeResolutionContext ctxt, Method method, AnnotationMap classAnn, AnnotationMap[] paramAnnotations) { super(ctxt, classAnn, paramAnnotations); if (method == null) { throw new IllegalArgumentException("Can not construct AnnotatedMethod with null Method"); } _method = method; } /** * Method used for JDK serialization support * @since 2.1 */ protected AnnotatedMethod(Serialization ser) { super(null, null, null); _method = null; _serialization = ser; } @Override public AnnotatedMethod withAnnotations(AnnotationMap ann) { return new AnnotatedMethod(_typeContext, _method, ann, _paramAnnotations); } @Override public Method getAnnotated() { return _method; } @Override public int getModifiers() { return _method.getModifiers(); } @Override public String getName() { return _method.getName(); } /** * For methods, this returns declared return type, which is only * useful with getters (setters do not return anything; hence `Void` * would be returned here) */ @Override public JavaType getType() { return _typeContext.resolveType(_method.getGenericReturnType()); } /** * For methods, this returns declared return type, which is only * useful with getters (setters do not usually return anything; * hence "void" type is returned here) */ @Override public Class<?> getRawType() { return _method.getReturnType(); } @Deprecated @Override public Type getGenericType() { return _method.getGenericReturnType(); } /* /***************************************************** /* AnnotatedWithParams /***************************************************** */ @Override public final Object call() throws Exception { return _method.invoke(null); } @Override public final Object call(Object[] args) throws Exception { return _method.invoke(null, args); } @Override public final Object call1(Object arg) throws Exception { return _method.invoke(null, arg); } public final Object callOn(Object pojo) throws Exception { return _method.invoke(pojo, (Object[]) null); } public final Object callOnWith(Object pojo, Object... args) throws Exception { return _method.invoke(pojo, args); } /* /******************************************************** /* AnnotatedMember impl /******************************************************** */ @Override public int getParameterCount() { return getRawParameterTypes().length; } @Override public Class<?> getRawParameterType(int index) { Class<?>[] types = getRawParameterTypes(); return (index >= types.length) ? null : types[index]; } @Override public JavaType getParameterType(int index) { Type[] types = _method.getGenericParameterTypes(); if (index >= types.length) { return null; } return _typeContext.resolveType(types[index]); } @Override @Deprecated // since 2.7 public Type getGenericParameterType(int index) { Type[] types = getGenericParameterTypes(); if (index >= types.length) { return null; } return types[index]; } @Override public Class<?> getDeclaringClass() { return _method.getDeclaringClass(); } @Override public Method getMember() { return _method; } @Override public void setValue(Object pojo, Object value) throws IllegalArgumentException { try { _method.invoke(pojo, value); } catch (IllegalAccessException | InvocationTargetException e) { throw new IllegalArgumentException("Failed to setValue() with method " +getFullName()+": "+e.getMessage(), e); } } @Override public Object getValue(Object pojo) throws IllegalArgumentException { try { return _method.invoke(pojo, (Object[]) null); } catch (IllegalAccessException | InvocationTargetException e) { throw new IllegalArgumentException("Failed to getValue() with method " +getFullName()+": "+e.getMessage(), e); } } /* /***************************************************** /* Extended API, generic /***************************************************** */ @Override public String getFullName() { return String.format("%s(%d params)", super.getFullName(), getParameterCount()); } public Class<?>[] getRawParameterTypes() { if (_paramClasses == null) { _paramClasses = _method.getParameterTypes(); } return _paramClasses; } @Deprecated // since 2.7 public Type[] getGenericParameterTypes() { return _method.getGenericParameterTypes(); } public Class<?> getRawReturnType() { return _method.getReturnType(); } /** * Helper method that can be used to check whether method returns * a value or not; if return type declared as <code>void</code>, returns * false, otherwise true * * @since 2.4 */ public boolean hasReturnType() { Class<?> rt = getRawReturnType(); return (rt != Void.TYPE && rt != Void.class); } /* /******************************************************** /* Other /******************************************************** */ @Override public String toString() { return "[method "+getFullName()+"]"; } @Override public int hashCode() { return _method.getName().hashCode(); } @Override public boolean equals(Object o) { if (o == this) return true; return ClassUtil.hasClass(o, getClass()) && (((AnnotatedMethod) o)._method == _method); } /* /********************************************************** /* JDK serialization handling /********************************************************** */ Object writeReplace() { return new AnnotatedMethod(new Serialization(_method)); } Object readResolve() { Class<?> clazz = _serialization.clazz; try { Method m = clazz.getDeclaredMethod(_serialization.name, _serialization.args); // 06-Oct-2012, tatu: Has "lost" its security override, may need to force back if (!m.isAccessible()) { ClassUtil.checkAndFixAccess(m, false); } return new AnnotatedMethod(null, m, null, null); } catch (Exception e) { throw new IllegalArgumentException("Could not find method '"+_serialization.name +"' from Class '"+clazz.getName()); } } /** * Helper class that is used as the workaround to persist * Field references. It basically just stores declaring class * and field name. */ private final static class Serialization implements java.io.Serializable { private static final long serialVersionUID = 1L; protected Class<?> clazz; protected String name; protected Class<?>[] args; public Serialization(Method setter) { clazz = setter.getDeclaringClass(); name = setter.getName(); args = setter.getParameterTypes(); } } }