org.eclipse.jdt.internal.compiler.ast.StringLiteralConcatenation.java Source code

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Here is the source code for org.eclipse.jdt.internal.compiler.ast.StringLiteralConcatenation.java

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/*******************************************************************************
 * Copyright (c) 2000, 2009 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;

import org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.eclipse.jdt.internal.compiler.lookup.BlockScope;

/**
 * Flatten string literal
 */
public class StringLiteralConcatenation extends StringLiteral {
    private static final int INITIAL_SIZE = 5;
    public Expression[] literals;
    public int counter;

    /**
     * Build a two-strings literal
     * */
    public StringLiteralConcatenation(StringLiteral str1, StringLiteral str2) {
        super(str1.sourceStart, str1.sourceEnd);
        this.source = str1.source;
        this.literals = new StringLiteral[INITIAL_SIZE];
        this.counter = 0;
        this.literals[this.counter++] = str1;
        extendsWith(str2);
    }

    /**
     *  Add the lit source to mine, just as if it was mine
     */
    @Override
    public StringLiteralConcatenation extendsWith(StringLiteral lit) {
        this.sourceEnd = lit.sourceEnd;
        final int literalsLength = this.literals.length;
        if (this.counter == literalsLength) {
            // resize
            System.arraycopy(this.literals, 0, this.literals = new StringLiteral[literalsLength + INITIAL_SIZE], 0,
                    literalsLength);
        }
        //uddate the source
        int length = this.source.length;
        System.arraycopy(this.source, 0, this.source = new char[length + lit.source.length], 0, length);
        System.arraycopy(lit.source, 0, this.source, length, lit.source.length);
        this.literals[this.counter++] = lit;
        return this;
    }

    @Override
    public StringBuffer printExpression(int indent, StringBuffer output) {
        output.append("StringLiteralConcatenation{"); //$NON-NLS-1$
        for (int i = 0, max = this.counter; i < max; i++) {
            this.literals[i].printExpression(indent, output);
            output.append("+\n");//$NON-NLS-1$
        }
        return output.append('}');
    }

    @Override
    public char[] source() {
        return this.source;
    }

    @Override
    public void traverse(ASTVisitor visitor, BlockScope scope) {
        if (visitor.visit(this, scope)) {
            for (int i = 0, max = this.counter; i < max; i++) {
                this.literals[i].traverse(visitor, scope);
            }
        }
        visitor.endVisit(this, scope);
    }
}