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package org.apache.tapestry.contrib.tree.simple; |
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import java.util.Collection; |
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import java.util.HashSet; |
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import java.util.Iterator; |
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import java.util.Set; |
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import org.apache.tapestry.contrib.tree.model.IMutableTreeNode; |
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import org.apache.tapestry.contrib.tree.model.ITreeNode; |
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public class TreeNode implements IMutableTreeNode |
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{ |
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private static final long serialVersionUID = 677919478017303186L; |
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protected Set m_setChildren; |
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protected IMutableTreeNode m_objParentNode; |
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public TreeNode() |
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{ |
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this(null); |
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} |
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public TreeNode(IMutableTreeNode parentNode) |
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{ |
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super(); |
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m_objParentNode = parentNode; |
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m_setChildren = new HashSet(); |
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} |
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public int getChildCount() |
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{ |
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return m_setChildren.size(); |
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} |
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public ITreeNode getParent() |
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{ |
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return m_objParentNode; |
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} |
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public boolean getAllowsChildren() |
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{ |
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return true; |
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} |
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public boolean isLeaf() |
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{ |
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return m_setChildren.size() == 0 ? true : false; |
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} |
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public Collection children() |
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{ |
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return m_setChildren; |
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} |
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public void insert(IMutableTreeNode child) |
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{ |
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child.setParent(this); |
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m_setChildren.add(child); |
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} |
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public void remove(IMutableTreeNode node) |
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{ |
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m_setChildren.remove(node); |
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} |
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public void removeFromParent() |
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{ |
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m_objParentNode.remove(this); |
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m_objParentNode = null; |
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} |
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public void setParent(IMutableTreeNode newParent) |
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{ |
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m_objParentNode = newParent; |
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} |
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public void insert(Collection colChildren) |
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{ |
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for(Iterator iter = colChildren.iterator(); iter.hasNext();) |
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{ |
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IMutableTreeNode element = (IMutableTreeNode) iter.next(); |
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element.setParent(this); |
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m_setChildren.add(element); |
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} |
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} |
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public boolean containsChild(ITreeNode node) |
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{ |
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return m_setChildren.contains(node); |
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} |
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public Collection getChildren() |
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{ |
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return m_setChildren; |
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} |
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} |