GcTargetRecord.java

/***************************************************************************
 * 
 * This file is part of the 'NDEF Tools for Android' project at
 * http://code.google.com/p/ndef-tools-for-android/
 * 
 * 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 org.ndeftools.wellknown;

import org.ndeftools.Record;

import android.annotation.SuppressLint;
import android.nfc.FormatException;
import android.nfc.NdefRecord;

/**
 * Generic Control Target Record.<br/><br/>
 * 
 * @author Adrian Stabiszewski (as@nfctools.org)
 *
 */

@SuppressLint("NewApi")
public class GcTargetRecord extends Record {

	public static byte[] type = {'t'}; 
	
	public static GcTargetRecord parseNdefRecord(NdefRecord ndefRecord) throws FormatException {
		return new GcTargetRecord(parse(ndefRecord.getPayload()));
	}

	private Record targetIdentifier;

	public GcTargetRecord(Record targetIdentifier) {
		setTargetIdentifier(targetIdentifier);
	}

	public GcTargetRecord() {
	}

	public void setTargetIdentifier(Record targetIdentifier) {
		if (targetIdentifier != null) {
			if ((targetIdentifier instanceof UriRecord) || (targetIdentifier instanceof TextRecord)) {
				this.targetIdentifier = targetIdentifier;
			} else {
				throw new IllegalArgumentException("Expected " + TextRecord.class.getSimpleName() + " or " + UriRecord.class.getSimpleName() + " target identifier, not " + targetIdentifier.getClass().getName() + ".");
			}
		} else {
			this.targetIdentifier = null;
		}
	}

	public Record getTargetIdentifier() {
		return targetIdentifier;
	}

	public boolean hasTargetIdentifier() {
		return targetIdentifier != null;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = super.hashCode();
		result = prime * result + ((targetIdentifier == null) ? 0 : targetIdentifier.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (!super.equals(obj))
			return false;
		if (getClass() != obj.getClass())
			return false;
		GcTargetRecord other = (GcTargetRecord)obj;
		if (targetIdentifier == null) {
			if (other.targetIdentifier != null)
				return false;
		}
		else if (!targetIdentifier.equals(other.targetIdentifier))
			return false;
		return true;
	}

	@Override
	public NdefRecord getNdefRecord() {
		if (!hasTargetIdentifier()) {
			throw new IllegalArgumentException("Expected target identifier");
		}
		
		return new NdefRecord(NdefRecord.TNF_WELL_KNOWN, type, id != null ? id : EMPTY, targetIdentifier.toByteArray());
	}
}