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MidiSynth / src / com.example.android.common.midi /

MidiPortWrapper.java

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/*
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 * Copyright (C) 2015 The Android Open Source Project
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package com.example.android.common.midi;
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import android.media.midi.MidiDeviceInfo;
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import android.media.midi.MidiDeviceInfo.PortInfo;
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import android.util.Log;
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// Wrapper for a MIDI device and port description.
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public class MidiPortWrapper {
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    private MidiDeviceInfo mInfo;
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    private int mPortIndex;
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    private int mType;
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    private String mString;
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    /**
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     * Wrapper for a MIDI device and port description.
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     * @param info
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     * @param portType
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     * @param portIndex
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     */
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    public MidiPortWrapper(MidiDeviceInfo info, int portType, int portIndex) {
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        mInfo = info;
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        mType = portType;
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        mPortIndex = portIndex;
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    }
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    private void updateString() {
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        if (mInfo == null) {
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            mString = "- - - - - -";
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        } else {
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            StringBuilder sb = new StringBuilder();
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            String name = mInfo.getProperties()
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                    .getString(MidiDeviceInfo.PROPERTY_NAME);
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            if (name == null) {
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                name = mInfo.getProperties()
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                        .getString(MidiDeviceInfo.PROPERTY_MANUFACTURER) + ", "
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                        + mInfo.getProperties()
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                                .getString(MidiDeviceInfo.PROPERTY_PRODUCT);
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            }
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            sb.append("#" + mInfo.getId());
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            sb.append(", ").append(name);
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            PortInfo portInfo = findPortInfo();
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            sb.append("[" + mPortIndex + "]");
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            if (portInfo != null) {
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                sb.append(", ").append(portInfo.getName());
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            } else {
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                sb.append(", null");
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            }
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            mString = sb.toString();
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        }
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    }
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    /**
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     * @param info
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     * @param portIndex
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     * @return
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     */
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    private PortInfo findPortInfo() {
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        PortInfo[] ports = mInfo.getPorts();
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        for (PortInfo portInfo : ports) {
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            if (portInfo.getPortNumber() == mPortIndex
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                    && portInfo.getType() == mType) {
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                return portInfo;
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            }
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        }
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        return null;
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    }
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    public int getPortIndex() {
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        return mPortIndex;
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    }
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    public MidiDeviceInfo getDeviceInfo() {
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        return mInfo;
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    }
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    @Override
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    public String toString() {
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        if (mString == null) {
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            updateString();
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        }
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        return mString;
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    }
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    @Override
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    public boolean equals(Object other) {
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        if (other == null)
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            return false;
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        if (!(other instanceof MidiPortWrapper))
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            return false;
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        MidiPortWrapper otherWrapper = (MidiPortWrapper) other;
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        if (mPortIndex != otherWrapper.mPortIndex)
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            return false;
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        if (mType != otherWrapper.mType)
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            return false;
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        if (mInfo == null)
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            return (otherWrapper.mInfo == null);
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        return mInfo.equals(otherWrapper.mInfo);
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    }
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    @Override
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    public int hashCode() {
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        int hashCode = 1;
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        hashCode = 31 * hashCode + mPortIndex;
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        hashCode = 31 * hashCode + mType;
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        hashCode = 31 * hashCode + mInfo.hashCode();
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        return hashCode;
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    }
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}
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