org.apache.camel.spi.TransformerKey Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.camel.spi;
import org.apache.camel.ValueHolder;
import org.apache.camel.util.StringHelper;
/**
* Key used in {@link org.apache.camel.spi.TransformerRegistry} in
* {@link org.apache.camel.impl.engine.AbstractCamelContext}, to ensure a consistent lookup.
*/
public final class TransformerKey extends ValueHolder {
private final DataType from;
private final DataType to;
public TransformerKey(String toType) {
this(DataType.ANY, new DataType(toType));
StringHelper.notEmpty(toType, "toType");
}
public TransformerKey(DataType to) {
this(DataType.ANY, to);
}
public TransformerKey(DataType from, DataType to) {
super(createKeyString(from, to));
this.from = from;
this.to = to;
}
/**
* Create the string that represents this transformer key. Either uses both full names of from/to data types in
* combination or only uses the toType data type full name in case fromType is not specified.
*/
private static String createKeyString(DataType from, DataType to) {
if (DataType.isAnyType(from)) {
return to.getFullName();
}
return from.getFullName() + "/" + to.getFullName();
}
/**
* Create the transformer key for the given transformer either using the transformer name or it's specified from/to
* data type name.
*/
public static TransformerKey createFrom(Transformer answer) {
if (!DataType.isAnyType(answer.getFrom()) && !DataType.isAnyType(answer.getTo())) {
return new TransformerKey(answer.getFrom(), answer.getTo());
}
return new TransformerKey(answer.getName());
}
public DataType getFrom() {
return from;
}
public DataType getTo() {
return to;
}
@Override
public String toString() {
return get();
}
}
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