113 lines
2.6 KiB
Java
113 lines
2.6 KiB
Java
package de.ctdo.bunti.dmx;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* DMXChannel container
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* @author jCoder
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*
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*/
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public class DMXChannels {
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protected Map<Integer,DMXChannel> channelByNumber = new HashMap<Integer, DMXChannel>();
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protected Map<String,DMXChannel> channelByName = new HashMap<String, DMXChannel>();
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/**
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* Returns the number of channels
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* @return number of channels
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*/
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public int getCount() {
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return this.channelByNumber.size();
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}
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/**
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* Returns a channel by name
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* @param name channel name
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* @return channel or null if not found
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*/
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public DMXChannel getChannelByName(String name) {
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if (name == null) {
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return null;
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}
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return this.channelByName.get(name);
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}
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/**
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* Returns a channel by offset
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* @param number number
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* @return channel or null if not found
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*/
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public DMXChannel getChannelByNumber(int number) {
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return this.channelByNumber.get(number);
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}
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/**
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* Adds a channel
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* @param channel channel to add
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* @return true on success, false on error
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*/
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public boolean addChannel(DMXChannel channel) {
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// object cannot be null
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if (channel == null) {
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return false;
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}
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// description cannot be null
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if (channel.getName() == null) {
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return false;
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}
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// entry must not exist by offset
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if (this.channelByNumber.containsKey(channel.getOffset())) {
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return false;
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}
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// entry must not exist by name
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if (this.channelByName.containsKey(channel.getName())) {
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return false;
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}
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this.channelByNumber.put(channel.getOffset(), channel);
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this.channelByName.put(channel.getName(), channel);
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return true;
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}
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/**
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* Removes a channel by offset
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* @param offset offset
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* @return removed channel or null if it does not exist
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*/
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public DMXChannel removeChannel(int offset) {
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DMXChannel tmpChannel = this.channelByNumber.remove(offset);
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if (tmpChannel != null) {
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this.channelByName.remove(tmpChannel.getName());
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}
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return tmpChannel;
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}
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/**
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* Removes a channel by name
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* @param name channel name
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* @return removed channel or null if it does not exist
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*/
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public DMXChannel removeChannel(String name) {
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if (name == null) {
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return null;
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}
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DMXChannel tmpChannel = this.channelByName.remove(name);
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if (tmpChannel != null) {
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this.channelByNumber.remove(tmpChannel.getOffset());
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}
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return tmpChannel;
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}
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/**
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* Returns an (unmodifiable) collection of all channels
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* @return unmodifiable collection of all channels
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*/
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public Collection<DMXChannel> getAllChannels() {
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return Collections.unmodifiableCollection(this.channelByNumber.values());
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}
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}
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