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Diffstat (limited to 'sca-java-1.x/branches/sca-java-1.6.2/modules/implementation-java/src/main/java/org/apache/tuscany/sca/implementation/java/impl/JavaElementImpl.java')
-rw-r--r-- | sca-java-1.x/branches/sca-java-1.6.2/modules/implementation-java/src/main/java/org/apache/tuscany/sca/implementation/java/impl/JavaElementImpl.java | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/implementation-java/src/main/java/org/apache/tuscany/sca/implementation/java/impl/JavaElementImpl.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/implementation-java/src/main/java/org/apache/tuscany/sca/implementation/java/impl/JavaElementImpl.java new file mode 100644 index 0000000000..e5fa399bf6 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/implementation-java/src/main/java/org/apache/tuscany/sca/implementation/java/impl/JavaElementImpl.java @@ -0,0 +1,225 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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 org.apache.tuscany.sca.implementation.java.impl; + +import java.lang.annotation.Annotation; +import java.lang.annotation.ElementType; +import java.lang.ref.WeakReference; +import java.lang.reflect.AnnotatedElement; +import java.lang.reflect.Constructor; +import java.lang.reflect.Field; +import java.lang.reflect.Method; +import java.lang.reflect.Type; + +/** + * This class represents a java element such as a Package, Class, Constructor, + * Field, Method or Parameter. + * + * @version $Rev$ $Date$ + */ +public class JavaElementImpl { + private AnnotatedElement anchor; + private ElementType elementType; + private WeakReference<Class<?>> type; + private WeakReference<Type> genericType; + private int index = -1; + private String name; + private Class<? extends Annotation> classifer; + + public JavaElementImpl(Package pkg) { + this.anchor = pkg; + this.elementType = ElementType.PACKAGE; + this.name = pkg.getName(); + } + + public JavaElementImpl(Class<?> cls) { + this.anchor = cls; + this.elementType = ElementType.TYPE; + this.type = new WeakReference<Class<?>>(cls); + this.genericType = new WeakReference<Type>(cls); + this.name = cls.getName(); + } + + public JavaElementImpl(Field field) { + this.anchor = field; + this.elementType = ElementType.FIELD; + this.type = new WeakReference<Class<?>>(field.getType()); + this.genericType = new WeakReference<Type>(field.getGenericType()); + this.name = field.getName(); + } + + public JavaElementImpl(Constructor<?> constructor, int index) { + this.anchor = constructor; + this.elementType = ElementType.PARAMETER; + this.type = new WeakReference<Class<?>>(constructor.getParameterTypes()[index]); + this.genericType = new WeakReference<Type>(constructor.getGenericParameterTypes()[index]); + this.index = index; + this.name = ""; + } + + public JavaElementImpl(Method method, int index) { + this.anchor = method; + this.elementType = ElementType.PARAMETER; + this.type = new WeakReference<Class<?>>(method.getParameterTypes()[index]); + this.genericType = new WeakReference<Type>(method.getGenericParameterTypes()[index]); + this.index = index; + this.name = ""; + } + + /** + * For testing purpose + * + * @param name + * @param type + * @param classifer TODO + * @param elementType + */ + public JavaElementImpl(String name, Class<?> type, Class<? extends Annotation> classifer) { + super(); + this.type = new WeakReference<Class<?>>(type); + this.name = name; + this.classifer = classifer; + } + + /** + * @return the anchor + */ + public AnnotatedElement getAnchor() { + return anchor; + } + + /** + * @return the elementType + */ + public ElementType getElementType() { + return elementType; + } + + /** + * @return the genericType + */ + public Type getGenericType() { + return genericType.get(); + } + + /** + * @return the index + */ + public int getIndex() { + return index; + } + + /** + * @return the type + */ + public Class<?> getType() { + return type.get(); + } + + public Annotation[] getAnnotations() { + if (elementType == ElementType.PARAMETER) { + if (anchor instanceof Method) { + // We only care about the method-level annotations + return ((Method)anchor).getAnnotations(); + } + if (anchor instanceof Constructor) { + return ((Constructor)anchor).getParameterAnnotations()[index]; + } + } + return anchor.getAnnotations(); + } + + public <T extends Annotation> T getAnnotation(Class<T> annotationType) { + for (Annotation a : getAnnotations()) { + if (a.annotationType() == annotationType) { + return annotationType.cast(a); + } + } + return null; + } + + @Override + public String toString() { + return anchor.toString() + (elementType == ElementType.PARAMETER ? "[" + index + "]" : ""); + } + + @Override + public int hashCode() { + final int PRIME = 31; + int result = 1; + result = PRIME * result + ((anchor == null) ? 0 : anchor.hashCode()); + result = PRIME * result + index; + return result; + } + + @Override + public boolean equals(Object obj) { + if (this == obj) { + return true; + } + if (obj == null) { + return false; + } + if (getClass() != obj.getClass()) { + return false; + } + final JavaElementImpl other = (JavaElementImpl)obj; + if (anchor == null) { + if (other.anchor != null) { + return false; + } + } else if (!anchor.equals(other.anchor)) { + return false; + } + if (index != other.index) { + return false; + } + return true; + } + + /** + * @return the name + */ + public String getName() { + return name; + } + + /** + * @param name the name to set + */ + public void setName(String name) { + this.name = name; + } + + /** + * @return the classifier + */ + public Class<? extends Annotation> getClassifer() { + return classifer; + } + + /** + * @param classifer the classifier to set + */ + public void setClassifer(Class<? extends Annotation> classifer) { + this.classifer = classifer; + } + +} |