jena-arq/src/main/java/org/apache/jena/riot/out/NodeFormatterNT.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jena.riot.out;

import org.apache.jena.atlas.io.AWriter;
import org.apache.jena.atlas.lib.CharSpace;
import org.apache.jena.atlas.lib.EscapeStr;
import org.apache.jena.riot.out.quoted.QuotedStringOutput;
import org.apache.jena.riot.out.quoted.QuotedStringOutputNT;
import org.apache.jena.riot.out.quoted.QuotedURI;

public class NodeFormatterNT extends NodeFormatterBase
{
    // Formatting for NTriples
    // Turtles extends this class to intercept forms it can do better.

    private final QuotedStringOutput quotedStringProc;
    private final QuotedURI quotedUriProc;

    public NodeFormatterNT() { this(CharSpace.UTF8); }

    public NodeFormatterNT(CharSpace charSpace) {
        quotedStringProc = new QuotedStringOutputNT(charSpace);
        quotedUriProc = new QuotedURI(charSpace);
    }

    @Override
    public void formatURI(AWriter w, String uriStr) {
        quotedUriProc.writeURI(w, uriStr);
    }

    @Override
    public void formatVar(AWriter w, String name) {
        w.print('?');
        EscapeStr.stringEsc(w, name, false);
    }

    @Override
    public void formatBNode(AWriter w, String label) {
        w.print("_:");
        String lab = NodeFmtLib.encodeBNodeLabel(label);
        w.print(lab);
    }

    @Override
    public void formatLitString(AWriter w, String lex) {
        writeEscaped(w, lex);
    }

    private void writeEscaped(AWriter w, String lex) {
        quotedStringProc.writeStr(w, lex);
    }

    @Override
    public void formatLitLang(AWriter w, String lex, String langTag) {
        writeEscaped(w, lex);
        w.print('@');
        w.print(langTag);
    }

    @Override
    public void formatLitDT(AWriter w, String lex, String datatypeURI) {
        writeEscaped(w, lex);
        w.print("^^");
        formatURI(w, datatypeURI);
    }
}