com.google.gwt.core.ext.linker.impl.StandardCompilationResult.java Source code

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Here is the source code for com.google.gwt.core.ext.linker.impl.StandardCompilationResult.java

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/*
 * Copyright 2008 Google Inc.
 * 
 * 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 com.google.gwt.core.ext.linker.impl;

import com.google.gwt.core.ext.linker.CompilationResult;
import com.google.gwt.core.ext.linker.SelectionProperty;
import com.google.gwt.core.ext.linker.SoftPermutation;
import com.google.gwt.core.ext.linker.StatementRanges;
import com.google.gwt.core.ext.linker.SymbolData;
import com.google.gwt.dev.jjs.PermutationResult;
import com.google.gwt.dev.util.DiskCache;
import com.google.gwt.dev.util.Util;
import com.google.gwt.dev.util.collect.Lists;

import java.io.Serializable;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.SortedMap;
import java.util.SortedSet;
import java.util.TreeMap;
import java.util.TreeSet;

/**
 * The standard implementation of {@link CompilationResult}.
 */
public class StandardCompilationResult extends CompilationResult {

    private static final class MapComparator
            implements Comparator<SortedMap<SelectionProperty, String>>, Serializable {
        public int compare(SortedMap<SelectionProperty, String> arg0, SortedMap<SelectionProperty, String> arg1) {
            int diff = arg0.size() - arg1.size();
            if (diff != 0) {
                return diff;
            }

            Iterator<String> i0 = arg0.values().iterator();
            Iterator<String> i1 = arg1.values().iterator();

            StringBuffer sb0 = new StringBuffer();
            StringBuffer sb1 = new StringBuffer();

            while (i0.hasNext()) {
                assert i1.hasNext();
                sb0.append(i0.next());
                sb1.append(i1.next());
            }
            assert !i1.hasNext();

            return sb0.toString().compareTo(sb1.toString());
        }
    }

    private static final SoftPermutation[] EMPTY_SOFT_PERMUTATION_ARRAY = {};

    /**
     * Smaller maps come before larger maps, then we compare the concatenation of
     * every value.
     */
    public static final Comparator<SortedMap<SelectionProperty, String>> MAP_COMPARATOR = new MapComparator();

    private static final DiskCache diskCache = DiskCache.INSTANCE;

    private final long jsToken[];

    private final SortedSet<SortedMap<SelectionProperty, String>> propertyValues = new TreeSet<SortedMap<SelectionProperty, String>>(
            MAP_COMPARATOR);

    private List<SoftPermutation> softPermutations = Lists.create();

    private final StatementRanges[] statementRanges;

    private final String strongName;

    private final long symbolToken;

    private final int permutationId;

    public StandardCompilationResult(PermutationResult permutationResult) {
        super(StandardLinkerContext.class);
        byte[][] js = permutationResult.getJs();
        this.strongName = Util.computeStrongName(js);
        byte[] serializedSymbolMap = permutationResult.getSerializedSymbolMap();
        this.statementRanges = permutationResult.getStatementRanges();
        this.permutationId = permutationResult.getPermutation().getId();
        this.jsToken = new long[js.length];
        for (int i = 0; i < jsToken.length; ++i) {
            jsToken[i] = diskCache.writeByteArray(js[i]);
        }
        this.symbolToken = diskCache.writeByteArray(serializedSymbolMap);
    }

    /**
     * Record a particular permutation of SelectionProperty values that resulted
     * in the compilation.
     */
    public void addSelectionPermutation(Map<SelectionProperty, String> values) {
        SortedMap<SelectionProperty, String> map = new TreeMap<SelectionProperty, String>(
                StandardLinkerContext.SELECTION_PROPERTY_COMPARATOR);
        map.putAll(values);
        propertyValues.add(Collections.unmodifiableSortedMap(map));
    }

    public void addSoftPermutation(Map<SelectionProperty, String> propertyMap) {
        softPermutations = Lists.add(softPermutations,
                new StandardSoftPermutation(softPermutations.size(), propertyMap));
    }

    @Override
    public String[] getJavaScript() {
        String[] js = new String[jsToken.length];
        for (int i = 0; i < jsToken.length; ++i) {
            js[i] = diskCache.readString(jsToken[i]);
        }
        return js;
    }

    @Override
    public int getPermutationId() {
        return permutationId;
    }

    @Override
    public SortedSet<SortedMap<SelectionProperty, String>> getPropertyMap() {
        return Collections.unmodifiableSortedSet(propertyValues);
    }

    @Override
    public SoftPermutation[] getSoftPermutations() {
        return softPermutations.toArray(new SoftPermutation[softPermutations.size()]);
    }

    @Override
    public StatementRanges[] getStatementRanges() {
        return statementRanges;
    }

    @Override
    public String getStrongName() {
        return strongName;
    }

    @Override
    public SymbolData[] getSymbolMap() {
        return diskCache.readObject(symbolToken, SymbolData[].class);
    }
}