Example usage for org.apache.commons.collections4.map LinkedMap remove

Introduction

In this page you can find the example usage for org.apache.commons.collections4.map LinkedMap remove.

Prototype

public V remove(final int index) 

Source Link

Document

Removes the element at the specified index.

Usage

From source file:org.apache.wicket.MarkupContainer.java

/**
 * Removes the child component identified by {@code childId} from the list of children.
 * //ww  w  .  j  a v  a2  s  . c  o m
 * Will change the internal list or map to a single component when the number of children hits
 * 1, but not change the internal map to a list when the threshold is reached (the memory was
 * already claimed, so there's little to be gained other than wasting CPU cycles for the
 * conversion).
 * 
 * @param childId
 *            the id of the child component to remove
 */
private void children_remove(String childId) {
    if (children instanceof Component) {
        Component oldChild = children();
        if (oldChild.getId().equals(childId)) {
            children = null;
            removals_add(oldChild, null);
        }
    } else if (children instanceof List) {
        List<Component> childrenList = children();
        Iterator<Component> it = childrenList.iterator();
        Component prevChild = null;
        while (it.hasNext()) {
            Component child = it.next();
            if (child.getId().equals(childId)) {
                it.remove();
                removals_add(child, prevChild);
                if (childrenList.size() == 1) {
                    children = childrenList.get(0);
                }
                return;
            }
            prevChild = child;
        }
    } else if (children instanceof LinkedMap) {
        LinkedMap<String, Component> childrenMap = children();
        if (childrenMap.containsKey(childId)) {
            String prevSiblingId = childrenMap.previousKey(childId);
            Component oldChild = childrenMap.remove(childId);
            removals_add(oldChild, childrenMap.get(prevSiblingId));
            if (childrenMap.size() == 1) {
                children = childrenMap.values().iterator().next();
            }
        }
    }
}

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