com.github.simy4.xpath.dom4j.navigator.Dom4jNavigator Maven / Gradle / Ivy

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Convenient utility to build XML models by evaluating XPath expressions
There is a newer version: 2.3.9
package com.github.simy4.xpath.dom4j.navigator;

import com.github.simy4.xpath.XmlBuilderException;
import com.github.simy4.xpath.dom4j.navigator.node.Dom4jDocument;
import com.github.simy4.xpath.dom4j.navigator.node.Dom4jElement;
import com.github.simy4.xpath.dom4j.navigator.node.Dom4jNode;
import com.github.simy4.xpath.navigator.Navigator;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.Namespace;
import org.dom4j.Node;

import javax.xml.namespace.QName;

public final class Dom4jNavigator implements Navigator> {

    private final Node xml;

    public Dom4jNavigator(Node xml) {
        this.xml = xml;
    }

    @Override
    public Dom4jNode root() {
        return new Dom4jDocument(xml.getDocument());
    }

    @Override
    public Dom4jNode parentOf(Dom4jNode node) {
        final Element parent = node.getNode().getParent();
        return null == parent ? null : new Dom4jElement(parent);
    }

    @Override
    public Iterable> elementsOf(final Dom4jNode parent) {
        return parent.elements();
    }

    @Override
    public Iterable> attributesOf(final Dom4jNode parent) {
        return parent.attributes();
    }

    @Override
    public Dom4jNode createAttribute(Dom4jNode parent, QName attribute) throws XmlBuilderException {
        final org.dom4j.QName attributeName = DocumentHelper.createQName(attribute.getLocalPart(),
                new Namespace(attribute.getPrefix(), attribute.getNamespaceURI()));
        return parent.createAttribute(attributeName);
    }

    @Override
    public Dom4jNode createElement(Dom4jNode parent, QName element) throws XmlBuilderException {
        final org.dom4j.QName elementName = DocumentHelper.createQName(element.getLocalPart(),
                new Namespace(element.getPrefix(), element.getNamespaceURI()));
        return parent.createElement(elementName);
    }

    @Override
    public void setText(Dom4jNode node, String text) {
        try {
            node.getNode().setText(text);
        } catch (UnsupportedOperationException uoe) {
            throw new XmlBuilderException("Unable to set text content to " + node, uoe);
        }
    }

    @Override
    public void prependCopy(Dom4jNode node) throws XmlBuilderException {
        final Node wrappedNode = node.getNode();
        if (Node.ELEMENT_NODE != wrappedNode.getNodeType()) {
            throw new XmlBuilderException("Unable to copy non-element node " + node);
        }
        final Element parent = wrappedNode.getParent();
        if (null == parent) {
            throw new XmlBuilderException("Unable to prepend - no parent found of " + node);
        }
        final int prependIndex = parent.indexOf(wrappedNode);
        final Element copiedNode = ((Element) wrappedNode).createCopy();
        parent.elements().add(prependIndex, copiedNode);
    }

    @Override
    public void remove(Dom4jNode node) {
        final Node wrappedNode = node.getNode();
        final Element parent = wrappedNode.getParent();
        if (parent != null) {
            parent.remove(wrappedNode);
        } else {
            throw new XmlBuilderException("Unable to remove node " + node
                    + ". Node either root or in detached state");
        }
    }

}