net.randomhacks.wave.voting.approval.ApprovalVotingLinker.java Source code

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Here is the source code for net.randomhacks.wave.voting.approval.ApprovalVotingLinker.java

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// PickSeveral - Approval voting wave gadget
// Copyright 2009 Eric Kidd
//
// 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 net.randomhacks.wave.voting.approval;

import com.google.gwt.core.ext.LinkerContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.linker.AbstractLinker;
import com.google.gwt.core.ext.linker.Artifact;
import com.google.gwt.core.ext.linker.ArtifactSet;
import com.google.gwt.core.ext.linker.LinkerOrder;
import com.google.gwt.core.ext.linker.SyntheticArtifact;

@LinkerOrder(LinkerOrder.Order.POST)
public class ApprovalVotingLinker extends AbstractLinker {
    private static final String OLD_GADGET_XML = "net.randomhacks.wave.voting.approval.client.ApprovalVoting.gadget.xml";
    private static final String NEW_GADGET_XML = "pickseveral.gadget.xml";

    @Override
    public String getDescription() {
        return "ApprovalVoting custom linker";
    }

    @Override
    public ArtifactSet link(TreeLogger logger, LinkerContext context, ArtifactSet artifacts)
            throws UnableToCompleteException {
        ArtifactSet results = new ArtifactSet(artifacts);
        renameSyntheticArtifact(logger, results, OLD_GADGET_XML, NEW_GADGET_XML);
        return results;
    }

    private void renameSyntheticArtifact(TreeLogger logger, ArtifactSet results, String sourcePartialPath,
            String destPartialPath) throws UnableToCompleteException {
        SyntheticArtifact artifact = findSyntheticArtifact(results, sourcePartialPath);
        if (artifact == null)
            throw new IllegalArgumentException("Cannot find " + sourcePartialPath);
        renameSyntheticArtifact(logger, results, artifact, destPartialPath);
    }

    private void renameSyntheticArtifact(TreeLogger logger, ArtifactSet result, SyntheticArtifact gadgetXml,
            String partialPath) throws UnableToCompleteException {
        result.remove(gadgetXml);
        result.add(
                emitInputStream(logger, gadgetXml.getContents(logger), partialPath, gadgetXml.getLastModified()));
    }

    private SyntheticArtifact findSyntheticArtifact(ArtifactSet artifacts, String partialPath) {
        SyntheticArtifact result = null;
        for (Artifact<?> artifact : artifacts) {
            if (artifact instanceof SyntheticArtifact) {
                SyntheticArtifact synthetic = (SyntheticArtifact) artifact;
                if (synthetic.getPartialPath().equals(partialPath)) {
                    result = synthetic;
                }
            }
        }
        return result;
    }
}