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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.http.internal.converter;
  14
  15 import java.util.function.Consumer;
  16
  17 import org.eclipse.jdt.annotation.NonNullByDefault;
  18 import org.eclipse.jdt.annotation.Nullable;
  19 import org.openhab.binding.http.internal.config.HttpChannelConfig;
  20 import org.openhab.binding.http.internal.transform.ValueTransformation;
  21 import org.openhab.core.library.types.DecimalType;
  22 import org.openhab.core.library.types.QuantityType;
  23 import org.openhab.core.types.Command;
  24 import org.openhab.core.types.State;
  25 import org.openhab.core.types.UnDefType;
  26
  27 /**
  28  * The {@link NumberItemConverter} implements {@link org.openhab.core.library.items.NumberItem} conversions
  29  *
  30  * @author Jan N. Klug - Initial contribution
  31  */
  32 @NonNullByDefault
  33 public class NumberItemConverter extends AbstractTransformingItemConverter {
  34
  35     public NumberItemConverter(Consumer<State> updateState, Consumer<Command> postCommand,
  36             @Nullable Consumer<String> sendHttpValue, ValueTransformation stateTransformations,
  37             ValueTransformation commandTransformations, HttpChannelConfig channelConfig) {
  38         super(updateState, postCommand, sendHttpValue, stateTransformations, commandTransformations, channelConfig);
  39     }
  40
  41     @Override
  42     protected @Nullable Command toCommand(String value) {
  43         return null;
  44     }
  45
  46     @Override
  47     protected State toState(String value) {
  48         String trimmedValue = value.trim();
  49         if (!trimmedValue.isEmpty()) {
  50             try {
  51                 if (channelConfig.unit != null) {
  52                     // we have a given unit - use that
  53                     return new QuantityType<>(trimmedValue + " " + channelConfig.unit);
  54                 } else {
  55                     try {
  56                         // try if we have a simple number
  57                         return new DecimalType(trimmedValue);
  58                     } catch (IllegalArgumentException e1) {
  59                         // not a plain number, maybe with unit?
  60                         return new QuantityType<>(trimmedValue);
  61                     }
  62                 }
  63             } catch (IllegalArgumentException e) {
  64                 // finally failed
  65             }
  66         }
  67         return UnDefType.UNDEF;
  68     }
  69
  70     @Override
  71     protected String toString(Command command) {
  72         return command.toString();
  73     }
  74 }