de.hasait.clap.impl.AbstractCLAPDecision.java Source code

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Here is the source code for de.hasait.clap.impl.AbstractCLAPDecision.java

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/*
 * Copyright (C) 2013 by Sebastian Hasait (sebastian at hasait dot de)
 *
 * 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 de.hasait.clap.impl;

import java.util.List;
import java.util.Map;

import org.apache.commons.lang3.tuple.Pair;

import de.hasait.clap.CLAP;

/**
 * Base class for all decision (XOR) nodes.
 */
public abstract class AbstractCLAPDecision extends AbstractCLAPNodeList {

    protected AbstractCLAPDecision(final CLAP pCLAP) {
        super(pCLAP);
    }

    @Override
    public final CLAPParseContext[] parse(final CLAPParseContext pContext) {
        if (list().isEmpty()) {
            return null;
        }

        final AbstractCLAPNode decision = pContext.getDecision(this);
        if (decision == null) {
            final CLAPParseContext[] result = new CLAPParseContext[list().size()];
            for (int i = 0; i < list().size(); i++) {
                result[i] = pContext.clone();
                result[i].addDecision(this, list().get(i));
            }
            return result;
        } else {
            return decision.parse(pContext);
        }
    }

    @Override
    public final void printUsage(final Map<CLAPUsageCategoryImpl, StringBuilder> pCategories,
            final CLAPUsageCategoryImpl pCurrentCategory, final StringBuilder pResult) {
        final Pair<CLAPUsageCategoryImpl, StringBuilder> pair = handleUsageCategory(pCategories, pCurrentCategory,
                pResult);
        if (pair != null) {
            final CLAPUsageCategoryImpl currentCategory = pair.getLeft();
            final StringBuilder result = pair.getRight();
            if (list().size() > 1) {
                result.append("{ "); //$NON-NLS-1$
            }
            internalPrintUsage(pCategories, currentCategory, result, " | "); //$NON-NLS-1$
            if (list().size() > 1) {
                result.append(" }"); //$NON-NLS-1$
            }
        }
    }

    @Override
    public final void validate(final CLAPParseContext pContext, final List<String> pErrorMessages) {
        final AbstractCLAPNode decision = pContext.getDecision(this);
        if (decision == null) {
            for (int i = 0; i < list().size(); i++) {
                list().get(i).validate(pContext, pErrorMessages);
            }
        } else {
            decision.validate(pContext, pErrorMessages);
        }
    }

}