PDFunctionTypeIdentity.java
/*
* Copyright 2014 The Apache Software Foundation.
*
* 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.apache.pdfbox.pdmodel.common.function;
import java.io.IOException;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSBase;
/**
* The identity function.
*
* @author Tilman Hausherr
*/
public class PDFunctionTypeIdentity extends PDFunction
{
public PDFunctionTypeIdentity(COSBase function)
{
super(null);
//TODO passing null is not good because getCOSObject() can result in an NPE in the base class
}
@Override
public int getFunctionType()
{
// shouldn't be called
throw new UnsupportedOperationException();
//TODO this is a violation of the interface segregation principle
}
@Override
public float[] eval(float[] input) throws IOException
{
return input;
}
@Override
protected COSArray getRangeValues()
{
return null;
}
/**
* {@inheritDoc}
*/
@Override
public String toString()
{
return "FunctionTypeIdentity";
}
}