/*
* 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.axiom.soap.impl.common;
import java.util.Iterator;
import org.apache.axiom.om.OMNode;
import org.apache.axiom.soap.SOAPHeader;
import org.apache.axiom.soap.SOAPHeaderBlock;
/** An Iterator which walks the header list as needed, potentially filtering as we traverse. */
public class HeaderIterator implements Iterator {
SOAPHeaderBlock current;
boolean advance = false;
Checker checker;
public HeaderIterator(SOAPHeader header) {
this(header, null);
}
public HeaderIterator(SOAPHeader header, Checker checker) {
this.checker = checker;
current = (SOAPHeaderBlock) header.getFirstElement();
if (current != null) {
if (!checkHeader(current)) {
advance = true;
hasNext();
}
}
}
public void remove() {
}
public boolean checkHeader(SOAPHeaderBlock header) {
if (checker == null) return true;
return checker.checkHeader(header);
}
public boolean hasNext() {
if (!advance) {
return current != null;
}
advance = false;
OMNode sibling = current.getNextOMSibling();
while (sibling != null) {
if (sibling instanceof SOAPHeaderBlock) {
SOAPHeaderBlock possible = (SOAPHeaderBlock) sibling;
if (checkHeader(possible)) {
current = (SOAPHeaderBlock) sibling;
return true;
}
}
sibling = sibling.getNextOMSibling();
}
current = null;
return false;
}
public Object next() {
SOAPHeaderBlock ret = current;
if (ret != null) {
advance = true;
hasNext();
}
return ret;
}
}