blanco.apex.syntaxparser.parser.BlancoApexSyntaxSourceParser Maven / Gradle / Ivy

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/*
 * Copyright 2016 Toshiki Iga
 *
 * 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 blanco.apex.syntaxparser.parser;

import java.io.File;

import blanco.apex.parser.token.BlancoApexCommentToken;
import blanco.apex.parser.token.BlancoApexNewlineToken;
import blanco.apex.parser.token.BlancoApexSpecialCharToken;
import blanco.apex.parser.token.BlancoApexToken;
import blanco.apex.parser.token.BlancoApexWhitespaceToken;
import blanco.apex.parser.token.BlancoApexWordToken;
import blanco.apex.syntaxparser.BlancoApexSyntaxConstants;
import blanco.apex.syntaxparser.BlancoApexSyntaxParserInput;
import blanco.apex.syntaxparser.BlancoApexSyntaxUtil;
import blanco.apex.syntaxparser.token.BlancoApexSyntaxSourceToken;

/**
 * Syntax parser for source.
 * 
 * @author Toshiki Iga
 */
public class BlancoApexSyntaxSourceParser extends AbstractBlancoApexSyntaxSyntaxParser {
    public static final boolean ISDEBUG = false;

    protected final BlancoApexSyntaxSourceToken sourceToken = new BlancoApexSyntaxSourceToken();

    /**
     * Construct parser instance.
     * 
     * @param input
     *            Input setting/information of syntax parser.
     */
    public BlancoApexSyntaxSourceParser(final BlancoApexSyntaxParserInput input) {
        super(input);
    }

    /**
     * Construct parser instance.
     * 
     * @param input
     *            Input setting/information of syntax parser.
     * @param sourceFile
     *            File object of source file.
     */
    public BlancoApexSyntaxSourceParser(final BlancoApexSyntaxParserInput input, final File sourceFile) {
        super(input);

        sourceToken.setSourceFile(sourceFile);
    }

    /**
     * Parse token from current position.
     * 
     * @return Result of parse.
     */
    public BlancoApexSyntaxSourceToken parse() {

        if (ISDEBUG)
            System.out.println("source parser: begin: " + input.getIndex());

        try {
            for (input.markRead();;) {
                if (input.availableToken() == false) {
                    input.resetRead();
                    for (; input.availableToken(); input.markRead()) {
                        sourceToken.getTokenList().add(input.readToken());
                    }
                    // end of loop; end of source.
                    input.markRead();
                    break;
                }

                final BlancoApexToken inputToken = input.readToken();

                if (inputToken instanceof BlancoApexWhitespaceToken || inputToken instanceof BlancoApexNewlineToken
                        || inputToken instanceof BlancoApexCommentToken) {
                    // skipping whitespace and comments simply.

                    // simple copy.
                    sourceToken.getTokenList().add(inputToken);
                    input.markRead();
                } else if (inputToken instanceof BlancoApexWordToken) {
                    final BlancoApexWordToken wordToken = (BlancoApexWordToken) inputToken;

                    // reserved word checking.
                    if (BlancoApexSyntaxUtil.isIncludedIgnoreCase(wordToken.getValue(),
                            BlancoApexSyntaxConstants.RESERVED_KEYWORDS)) {
                        input.resetRead();
                        parseSourceReservedKeyword();
                        input.resetRead();
                    } else {
                        // maybe name
                        System.out.println(
                                "SOURCE(L77): Unexpected token: simply copy. It should be keyword or annotations...: "
                                        + wordToken.getDisplayString());
                        sourceToken.getTokenList().add(inputToken);
                        input.markRead();
                    }
                } else if (inputToken instanceof BlancoApexSpecialCharToken) {
                    final BlancoApexSpecialCharToken specialCharToken = (BlancoApexSpecialCharToken) inputToken;
                    if (specialCharToken.getValue().equals("@")) {
                        input.resetRead();
                        sourceToken.getTokenList().add(new BlancoApexSyntaxAnnotationParser(input).parse());
                        input.markRead();
                    } else {
                        // copy simply.
                        System.out.println(
                                "SOURCE(L89): Unexpected token. simply copy.: " + inputToken.getDisplayString());
                        sourceToken.getTokenList().add(inputToken);
                        input.markRead();
                    }
                } else {
                    System.out.println("SOURCE(L93): Unexpected token. simply copy.: " + inputToken.getDisplayString());
                    sourceToken.getTokenList().add(inputToken);
                    input.markRead();
                }
            }
        } finally {
            if (ISDEBUG)
                System.out.println("source parser: end: " + input.getIndex());
        }

        return sourceToken;
    }

    /**
     * Seeking phase.
     */
    protected void parseSourceReservedKeyword() {
        // class start!!!

        // mark here!
        input.markRead();

        for (; input.availableToken();) {
            final BlancoApexToken inputToken = input.readToken();

            // seek class or interface or something...
            if (inputToken instanceof BlancoApexWordToken) {
                final BlancoApexWordToken wordToken = (BlancoApexWordToken) inputToken;
                if (BlancoApexSyntaxUtil.isIncludedIgnoreCase(wordToken.getValue(),
                        BlancoApexSyntaxConstants.RESERVED_KEYWORDS)) {
                    wordToken.setReservedKeyword(true);
                }

                if (BlancoApexSyntaxUtil.isIncludedIgnoreCase(wordToken.getValue(),
                        BlancoApexSyntaxConstants.MODIFIER_KEYWORDS)) {
                    // will be modifier of class.
                    // skip and read next
                } else if (wordToken.getValue().equalsIgnoreCase("class")
                        || wordToken.getValue().equalsIgnoreCase("interface")) {
                    // found class!
                    // TODO I'm not sure interface is equals to class or
                    // not.

                    // reset mark and parse from beginning.
                    input.resetRead();

                    // open class parser.
                    sourceToken.getTokenList().add(new BlancoApexSyntaxClassParser(input).parse());

                    input.markRead();

                    // exit here!
                    return;

                } else if (wordToken.getValue().equalsIgnoreCase("enum")) {
                    // reset mark and parse from beginning.
                    input.resetRead();

                    // open class parser.
                    sourceToken.getTokenList().add(new BlancoApexSyntaxEnumParser(input).parse());

                    input.markRead();

                    // exit here!
                    return;

                } else {
                    System.out.println("SOURCE(L155): non supported token.: " + inputToken.getDisplayString());
                }
            } else {
                // do nothing
                // ignorable for seeking.
                if (ISDEBUG)
                    System.out.println("source parser: do nothing: [" + inputToken.getValue() + "]");
            }
        }
    }
}