org.parboiled.DefaultParsingNode Maven / Gradle / Ivy

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/*
 * Copyright (C) 2009-2011 Mathias Doenitz
 *
 * 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 org.parboiled;

import com.github.parboiled1.grappa.annotations.VisibleForDocumentation;
import com.github.parboiled1.grappa.matchers.base.Matcher;
import com.google.common.base.Preconditions;
import org.parboiled.support.CharsEscaper;
import org.parboiled.trees.ImmutableTreeNode;

import javax.annotation.Nullable;
import java.util.List;

/**
 * An immutable implementation of the Node interface.
 */
@VisibleForDocumentation
public final class DefaultParsingNode
    extends ImmutableTreeNode>
    implements Node
{
    private final Matcher matcher;
    private final int startIndex;
    private final int endIndex;
    private final V value;
    private final boolean hasError;

    public DefaultParsingNode(final Matcher matcher,
        final List> children, final int startIndex,
        final int endIndex, @Nullable final V value, final boolean hasError)
    {
        super(children);
        this.matcher = Preconditions.checkNotNull(matcher, "matcher");
        this.startIndex = startIndex;
        this.endIndex = endIndex;
        this.value = value;
        this.hasError = hasError;
    }

    @Override
    public Matcher getMatcher()
    {
        return matcher;
    }

    @Override
    public String getLabel()
    {
        return matcher.getLabel();
    }

    @Override
    public int getStartIndex()
    {
        return startIndex;
    }

    @Override
    public int getEndIndex()
    {
        return endIndex;
    }

    @Override
    public V getValue()
    {
        return value;
    }

    @Override
    public boolean hasError()
    {
        return hasError;
    }

    @Override
    public String toString()
    {
        final StringBuilder sb = new StringBuilder();
        sb.append('[');
        sb.append(getLabel());
        if (value != null) {
            sb.append(", {").append(value).append('}');
        }
        sb.append(']');
        if (hasError)
            sb.append('E');
        return CharsEscaper.INSTANCE.escape(sb.toString());
    }
}