165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn/* 265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * Copyright (C) 2011 The Android Open Source Project 365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * 465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * Licensed under the Apache License, Version 2.0 (the "License"); 565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * you may not use this file except in compliance with the License. 665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * You may obtain a copy of the License at 765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * 865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * http://www.apache.org/licenses/LICENSE-2.0 965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * 1065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * Unless required by applicable law or agreed to in writing, software 1165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * distributed under the License is distributed on an "AS IS" BASIS, 1265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * See the License for the specific language governing permissions and 1465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * limitations under the License. 1565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn */ 1665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 1765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 1865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennpackage android.filterfw.core; 1965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 2065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennimport java.lang.reflect.Field; 2165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 2265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn/** 2365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * @hide 2465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn */ 2565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennpublic class FieldPort extends InputPort { 2665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 2765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn protected Field mField; 2865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn protected boolean mHasFrame; 2965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn protected boolean mValueWaiting = false; 3065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn protected Object mValue; 3165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public FieldPort(Filter filter, String name, Field field, boolean hasDefault) { 3365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn super(filter, name); 3465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mField = field; 3565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mHasFrame = hasDefault; 3665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 3765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 3965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public void clear() { 4065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 4165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 4265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 4365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public void pushFrame(Frame frame) { 4465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn setFieldFrame(frame, false); 4565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 4665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 4765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 4865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public void setFrame(Frame frame) { 4965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn setFieldFrame(frame, true); 5065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 5165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 5265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 5365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public Object getTarget() { 5465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn try { 5565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return mField.get(mFilter); 5665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } catch (IllegalAccessException e) { 5765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return null; 5865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 5965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 6065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 6165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 6265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public synchronized void transfer(FilterContext context) { 6365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (mValueWaiting) { 6465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn try { 6565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mField.set(mFilter, mValue); 6665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } catch (IllegalAccessException e) { 6765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn throw new RuntimeException( 6865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn "Access to field '" + mField.getName() + "' was denied!"); 6965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 7065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mValueWaiting = false; 7165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (context != null) { 7265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mFilter.notifyFieldPortValueUpdated(mName, context); 7365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 7465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 7565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 7665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 7765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 7865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public synchronized Frame pullFrame() { 7965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn throw new RuntimeException("Cannot pull frame on " + this + "!"); 8065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 8165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 8265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 8365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public synchronized boolean hasFrame() { 8465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return mHasFrame; 8565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 8665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 8765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 8865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public synchronized boolean acceptsFrame() { 8965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return !mValueWaiting; 9065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 9165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 9265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 9365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public String toString() { 9465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return "field " + super.toString(); 9565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 9665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 9765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn protected synchronized void setFieldFrame(Frame frame, boolean isAssignment) { 9865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn assertPortIsOpen(); 9965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn checkFrameType(frame, isAssignment); 10065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 10165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Store the object value 10265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn Object value = frame.getObjectValue(); 10365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if ((value == null && mValue != null) || !value.equals(mValue)) { 10465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mValue = value; 10565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mValueWaiting = true; 10665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 10765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 10865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Since a frame was set, mark this port as having a frame to pull 10965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mHasFrame = true; 11065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 11165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 112