org.openmdx.base.accessor.rest.MergingConsumer Maven / Gradle / Ivy
/*
* ====================================================================
* Project: openMDX/Core, http://www.openmdx.org/
* Description: Merging Consumer
* Owner: OMEX AG, Switzerland, http://www.omex.ch
* ====================================================================
*
* This software is published under the BSD license as listed below.
*
* Copyright (c) 2018, OMEX AG, Switzerland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of the openMDX team nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* ------------------
*
* This product includes software developed by other organizations as
* listed in the NOTICE file.
*/
package org.openmdx.base.accessor.rest;
import java.util.Comparator;
import java.util.Iterator;
import java.util.function.Consumer;
import org.openmdx.base.accessor.cci.DataObject_1_0;
import org.openmdx.base.accessor.rest.AbstractContainer_1.Included;
class MergingConsumer implements Consumer {
MergingConsumer(
Consumer delegate,
Included included
) {
this.delegate = delegate;
this.included = included.iterator();
this.comparator = included.getComparator();
}
private final Consumer delegate;
private final Iterator included;
private final Comparator comparator;
private DataObject_1_0 nextDirty;
@Override
public void accept(DataObject_1_0 nextClean) {
while(useDirty(nextClean)) {
this.delegate.accept(nextDirty);
this.nextDirty = null;
}
this.delegate.accept(nextClean);
}
private boolean useDirty(DataObject_1_0 nextClean){
if(this.nextDirty == null) {
if(this.included.hasNext()) {
this.nextDirty = this.included.next();
} else {
return false;
}
}
return this.comparator.compare(this.nextDirty, nextClean) <= 0;
}
void processRemaining(){
if(this.nextDirty != null) {
delegate.accept(nextDirty);
}
while(this.included.hasNext()) {
delegate.accept(this.included.next());
}
}
}