com.isotrol.impe3.freemarker.wrap.URIBuilderModel.java Source code

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Here is the source code for com.isotrol.impe3.freemarker.wrap.URIBuilderModel.java

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/**
 * This file is part of Port@l
 * Port@l 3.0 - Portal Engine and Management System
 * Copyright (C) 2010  Isotrol, SA.  http://www.isotrol.com
 *
 * Port@l is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Port@l is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Port@l.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.isotrol.impe3.freemarker.wrap;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.isotrol.impe3.freemarker.wrap.ModelUtils.buildURIQueryParameters;
import static com.isotrol.impe3.freemarker.wrap.ModelUtils.notNullArgs;
import static com.isotrol.impe3.freemarker.wrap.ModelUtils.uri;

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

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.LinkedListMultimap;
import com.google.common.collect.Multimap;
import com.isotrol.impe3.api.RequestParams;
import com.isotrol.impe3.api.Route;
import com.isotrol.impe3.freemarker.FreeMarkerFunction;

import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;

/**
 * FreeMarker model for a route URI builder.
 * @author Andres Rodriguez
 */
final class URIBuilderModel extends AbstractImpeModel {
    /** Destination route. */
    private final Route route;
    /** Current parameters. */
    private final Multimap<String, String> parameters = LinkedListMultimap.create();
    /** Current parameters. */
    private final Map<String, TemplateModel> map = ImmutableMap.<String, TemplateModel>builder()
            .put("uri", new Uri()).put("absUri", new AbsUri()).put("clear", new Clear())
            .put("putCurrent", new PutCurrent()).put("replaceWithCurrent", new ReplaceWithCurrent()).build();

    /**
     * Constructor.
     * @param wrapper Object wrapper.
     * @param route Destination route.
     */
    URIBuilderModel(PortalObjectWrapper wrapper, Route route) {
        super(wrapper);
        this.route = checkNotNull(route);
    }

    @Override
    Map<String, TemplateModel> getModels() {
        return map;
    }

    private Multimap<String, String> merge(List<String> args) {
        Multimap<String, String> extra = buildURIQueryParameters(args, 0);
        if (extra.isEmpty()) {
            return parameters;
        }
        Multimap<String, String> total = LinkedListMultimap.create(parameters);
        total.putAll(extra);
        return total;
    }

    private class Uri extends FreeMarkerFunction {
        @Override
        public Object apply(List<String> args) throws TemplateModelException {
            return uri(getContext().getURI(route, merge(args)));
        }
    }

    private class AbsUri extends FreeMarkerFunction {
        @Override
        public Object apply(List<String> args) throws TemplateModelException {
            return uri(getContext().getAbsoluteURI(route, merge(args)));
        }
    }

    private class Clear extends FreeMarkerFunction {
        @Override
        public Object apply(List<String> args) throws TemplateModelException {
            parameters.clear();
            return URIBuilderModel.this;
        }
    }

    private class PutCurrent extends FreeMarkerFunction {
        @Override
        public Object apply(List<String> args) throws TemplateModelException {
            final RequestParams rp = getContext().getRequestParams();
            for (String name : notNullArgs(args)) {
                parameters.putAll(name, rp.get(name));
            }
            return URIBuilderModel.this;
        }
    }

    private class ReplaceWithCurrent extends FreeMarkerFunction {
        @Override
        public Object apply(List<String> args) throws TemplateModelException {
            final RequestParams rp = getContext().getRequestParams();
            for (String name : notNullArgs(args)) {
                parameters.replaceValues(name, rp.get(name));
            }
            return URIBuilderModel.this;
        }
    }

}