com.github.simy4.xpath.util.SimpleNamespaceContext 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.util;

import javax.xml.XMLConstants;
import javax.xml.namespace.NamespaceContext;
import java.util.Collections;
import java.util.Iterator;

public final class SimpleNamespaceContext implements NamespaceContext {

    @Override
    public String getNamespaceURI(String prefix) {
        if (null == prefix) {
            throw new IllegalArgumentException("prefix");
        } else if (XMLConstants.XMLNS_ATTRIBUTE.equals(prefix)) {
            return XMLConstants.XMLNS_ATTRIBUTE_NS_URI;
        } else if (XMLConstants.XML_NS_PREFIX.equals(prefix)) {
            return XMLConstants.XML_NS_URI;
        } else if ("my".equals(prefix)) {
            return "http://www.example.com/my";
        } else {
            return XMLConstants.NULL_NS_URI;
        }
    }

    @Override
    public String getPrefix(String namespaceUri) {
        if (null == namespaceUri) {
            throw new IllegalArgumentException("namespaceURI");
        } else if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(namespaceUri)) {
            return XMLConstants.XMLNS_ATTRIBUTE;
        } else if (XMLConstants.XML_NS_URI.equals(namespaceUri)) {
            return XMLConstants.XML_NS_PREFIX;
        } else if ("http://www.example.com/my".equals(namespaceUri)) {
            return "my";
        } else {
            return XMLConstants.DEFAULT_NS_PREFIX;
        }
    }

    @Override
    public Iterator getPrefixes(String namespaceUri) {
        if (null == namespaceUri) {
            throw new IllegalArgumentException("namespaceURI");
        } else if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(namespaceUri)) {
            return Collections.singletonList(XMLConstants.XMLNS_ATTRIBUTE).iterator();
        } else if (XMLConstants.XML_NS_URI.equals(namespaceUri)) {
            return Collections.singletonList(XMLConstants.XML_NS_PREFIX).iterator();
        } else if ("http://www.example.com/my".equals(namespaceUri)) {
            return Collections.singletonList("my").iterator();
        } else {
            return Collections.emptyList().iterator();
        }
    }

    @Override
    public String toString() {
        return "{my -> http://www.example.com/my}";
    }

}