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package org.zwobble.mammoth.internal.xml;
import org.zwobble.mammoth.internal.util.Iterables;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import static org.zwobble.mammoth.internal.util.Iterables.*;
import static org.zwobble.mammoth.internal.util.Lists.toList;
import static org.zwobble.mammoth.internal.util.Maps.lookup;
public class XmlElement implements XmlNode, XmlElementLike {
private final String name;
private final Map<String, String> attributes;
private final List<XmlNode> children;
public XmlElement(String name, Map<String, String> attributes, List<XmlNode> children) {
this.name = name;
this.attributes = attributes;
this.children = children;
}
public String getName() {
return name;
}
public Map<String, String> getAttributes() {
return attributes;
}
public String getAttribute(String name) {
return getAttributeOrNone(name)
.orElseThrow(() -> new RuntimeException("Element has no '" + name + "' attribute"));
}
@Override
public Optional<String> getAttributeOrNone(String name) {
return lookup(attributes, name);
}
@Override
public String innerText() {
return String.join("", lazyMap(children, XmlNode::innerText));
}
@Override
public <T> T accept(XmlNodeVisitor<T> visitor) {
return visitor.visit(this);
}
@Override
public List<XmlNode> getChildren() {
return children;
}
@Override
public String toString() {
return "XmlElement(name=" + name + ", attributes=" + attributes
+ ", children=" + children + ")";
}
public XmlElementList findChildren(String name) {
return new XmlElementList(toList(findChildrenIterable(name)));
}
public Optional<XmlElement> findChild(String name) {
return Iterables.getFirst(findChildrenIterable(name));
}
@Override
public boolean hasChild(String name) {
return findChildrenIterable(name).iterator().hasNext();
}
@Override
public XmlElementLike findChildOrEmpty(String name) {
return getFirst(findChildrenIterable(name), NullXmlElement.INSTANCE);
}
private Iterable<XmlElement> findChildrenIterable(String name) {
return lazyFilter(
lazyFilter(children, XmlElement.class),
child -> child.getName().equals(name));
}
}
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