ThemisAnalysisSwitch.java

/*
 * Themis: Java Project Framework
 * Copyright 2012-2026. Tony Washer
 *
 * Licensed 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 io.github.tonywasher.joceanus.themis.lethe.analysis;

import io.github.tonywasher.joceanus.oceanus.base.OceanusException;
import io.github.tonywasher.joceanus.themis.exc.ThemisDataException;
import io.github.tonywasher.joceanus.themis.lethe.analysis.ThemisAnalysisContainer.ThemisAnalysisAdoptable;
import io.github.tonywasher.joceanus.themis.lethe.analysis.ThemisAnalysisStatement.ThemisAnalysisStatementHolder;

import java.util.ArrayDeque;
import java.util.Collections;
import java.util.Deque;
import java.util.Iterator;

/**
 * Switch construct.
 */
public class ThemisAnalysisSwitch
        implements ThemisAnalysisContainer, ThemisAnalysisAdoptable, ThemisAnalysisStatementHolder {
    /**
     * The switch value.
     */
    private final ThemisAnalysisStatement theSwitch;

    /**
     * The contents.
     */
    private final Deque<ThemisAnalysisElement> theContents;

    /**
     * The number of lines.
     */
    private final int theNumLines;

    /**
     * The parent.
     */
    private ThemisAnalysisContainer theParent;

    /**
     * Constructor.
     *
     * @param pParser the parser
     * @param pLine   the initial switch line
     * @throws OceanusException on error
     */
    ThemisAnalysisSwitch(final ThemisAnalysisParser pParser,
                         final ThemisAnalysisLine pLine) throws OceanusException {
        /* Access details from parser */
        theParent = pParser.getParent();

        /* Parse the switch */
        final Deque<ThemisAnalysisElement> myHeaders = ThemisAnalysisBuilder.parseHeaders(pParser, pLine);
        theNumLines = myHeaders.size() + 1;
        theSwitch = new ThemisAnalysisStatement(myHeaders);

        /* Parse the body */
        final Deque<ThemisAnalysisElement> myLines = ThemisAnalysisBuilder.processBody(pParser);

        /* Create a parser */
        theContents = new ArrayDeque<>();
        final ThemisAnalysisParser myParser = new ThemisAnalysisParser(myLines, theContents, theParent);
        processLines(myParser);
    }

    /**
     * process the lines.
     *
     * @param pParser the parser
     * @throws OceanusException on error
     */
    void processLines(final ThemisAnalysisParser pParser) throws OceanusException {
        /* Loop through the lines */
        while (pParser.hasLines()) {
            /* Access next line */
            final ThemisAnalysisLine myLine = (ThemisAnalysisLine) pParser.popNextLine();

            /* Process comments and blanks */
            final boolean processed = pParser.processCommentsAndBlanks(myLine)
                    || pParser.processCase(this, myLine);

            /* If we haven't processed yet */
            if (!processed) {
                /* We should never reach here */
                throw new ThemisDataException("Unexpected code in switch");
            }
        }
    }

    @Override
    public Deque<ThemisAnalysisElement> getContents() {
        return theContents;
    }

    @Override
    public Iterator<ThemisAnalysisStatement> statementIterator() {
        return Collections.singleton(theSwitch).iterator();
    }

    @Override
    public ThemisAnalysisContainer getParent() {
        return theParent;
    }

    @Override
    public void setParent(final ThemisAnalysisContainer pParent) {
        theParent = pParent;
    }

    @Override
    public int getNumLines() {
        return theNumLines;
    }

    @Override
    public String toString() {
        return theSwitch.toString();
    }
}