/* * Copyright 1999-2012 Alibaba Group. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.alibaba.dubbo.common.beanutil; import java.io.Serializable; import java.util.Iterator; import java.util.LinkedHashMap; import java.util.Map; /** * @author <a href="mailto:gang.lvg@taobao.com">kimi</a> */ public final class JavaBeanDescriptor implements Serializable, Iterable<Map.Entry<Object, Object>> { private static final long serialVersionUID = -8505586483570518029L; public static final int TYPE_CLASS = 1; public static final int TYPE_ENUM = 2; public static final int TYPE_COLLECTION = 3; public static final int TYPE_MAP = 4; public static final int TYPE_ARRAY = 5; /** @see com.alibaba.dubbo.common.utils.ReflectUtils#isPrimitive(Class) */ public static final int TYPE_PRIMITIVE = 6; public static final int TYPE_BEAN = 7; private static final String ENUM_PROPERTY_NAME = "name"; private static final String CLASS_PROPERTY_NAME = "name"; private static final String PRIMITIVE_PROPERTY_VALUE = "value"; /** * Used to define a type is valid. * @see #isValidType(int) */ private static final int TYPE_MAX = TYPE_BEAN; /** * Used to define a type is valid. * @see #isValidType(int) */ private static final int TYPE_MIN = TYPE_CLASS; private String className; private int type; private Map<Object, Object> properties = new LinkedHashMap<Object, Object>(); public JavaBeanDescriptor() {} public JavaBeanDescriptor(String className, int type) { notEmpty(className, "class name is empty"); if (!isValidType(type)) { throw new IllegalArgumentException( new StringBuilder(16).append("type [ ") .append(type).append(" ] is unsupported").toString()); } this.className = className; this.type = type; } public void setClassName(String className) { this.className = className; } public void setType(int type) { this.type = type; } public boolean isClassType() { return TYPE_CLASS == type; } public boolean isEnumType() { return TYPE_ENUM == type; } public boolean isCollectionType() { return TYPE_COLLECTION == type; } public boolean isMapType() { return TYPE_MAP == type; } public boolean isArrayType() { return TYPE_ARRAY == type; } public boolean isPrimitiveType() { return TYPE_PRIMITIVE == type; } public boolean isBeanType() { return TYPE_BEAN == type; } public int getType() { return type; } public String getClassName() { return className; } public Object setProperty(Object propertyName, Object propertyValue) { notNull(propertyName, "Property name is null"); Object oldValue = properties.put(propertyName, propertyValue); return oldValue; } public String setEnumNameProperty(String name) { if (isEnumType()) { Object result = setProperty(ENUM_PROPERTY_NAME, name); return result == null ? null : result.toString(); } throw new IllegalStateException("The instance is not a enum wrapper"); } public String getEnumPropertyName() { if (isEnumType()) { Object result = getProperty(ENUM_PROPERTY_NAME).toString(); return result == null ? null : result.toString(); } throw new IllegalStateException("The instance is not a enum wrapper"); } public String setClassNameProperty(String name) { if (isClassType()) { Object result = setProperty(CLASS_PROPERTY_NAME, name); return result == null ? null : result.toString(); } throw new IllegalStateException("The instance is not a class wrapper"); } public String getClassNameProperty() { if (isClassType()) { Object result = getProperty(CLASS_PROPERTY_NAME); return result == null ? null : result.toString(); } throw new IllegalStateException("The instance is not a class wrapper"); } public Object setPrimitiveProperty(Object primitiveValue) { if (isPrimitiveType()) { return setProperty(PRIMITIVE_PROPERTY_VALUE, primitiveValue); } throw new IllegalStateException("The instance is not a primitive type wrapper"); } public Object getPrimitiveProperty() { if (isPrimitiveType()) { return getProperty(PRIMITIVE_PROPERTY_VALUE); } throw new IllegalStateException("The instance is not a primitive type wrapper"); } public Object getProperty(Object propertyName) { notNull(propertyName, "Property name is null"); Object propertyValue = properties.get(propertyName); return propertyValue; } public boolean containsProperty(Object propertyName) { notNull(propertyName, "Property name is null"); return properties.containsKey(propertyName); } public Iterator<Map.Entry<Object, Object>> iterator() { return properties.entrySet().iterator(); } public int propertySize() { return properties.size(); } private boolean isValidType(int type) { return TYPE_MIN <= type && type <= TYPE_MAX; } private void notNull(Object obj, String message) { if (obj == null) { throw new IllegalArgumentException(message); } } private void notEmpty(String string, String message) { if (isEmpty(string)) { throw new IllegalArgumentException(message); } } private boolean isEmpty(String string) { return string == null || "".equals(string.trim()); } }