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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2022 Saxonica Limited
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
package net.sf.saxon.tree.jiter;
import java.util.Iterator;
/**
* A Java Iterator which applies a mapping function to each item in an input sequence
* @param the type of the input items
* @param the type of the delivered item
*/
public class MappingJavaIterator implements Iterator {
private final Iterator input;
private final java.util.function.Function mapper;
/**
* Create a mapping iterator
* @param in the input sequence
* @param mapper the mapping function to be applied to each item in the ipnut sequence to
* generate the corresponding item in the result sequence
*/
public MappingJavaIterator(Iterator in, java.util.function.Function mapper) {
this.input = in;
this.mapper = mapper;
}
@Override
public boolean hasNext() {
return input.hasNext();
}
@Override
public T next() {
while (true) {
T next = mapper.apply(input.next());
if (next != null) {
return next;
}
}
}
//C# emulation of java.util.Iterator omits remove() method
@Override
public void remove() {
input.remove();
}
}