com.facebook.buck.cxx.NativeLinkableInput.java Source code

Introduction

Here is the source code for com.facebook.buck.cxx.NativeLinkableInput.java

Source

/*
 * Copyright 2014-present Facebook, 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.facebook.buck.cxx;

import com.facebook.buck.rules.SourcePath;
import com.google.common.base.Objects;
import com.google.common.collect.ImmutableList;

import javax.annotation.Nullable;

/**
 * A class containing inputs to be passed to the native linker.  Dependencies (e.g. C++ libraries)
 * of a top-level native linkable rule (e.g. C++ binary) can use this to contribute components to
 * the final link.
 */
public class NativeLinkableInput {

    // Inputs used by linker.
    private final ImmutableList<SourcePath> inputs;

    // Arguments to pass to the linker.  In the future it'd be nice to make this more aware of
    // the differences between archives, objects, flags, etc.
    private final ImmutableList<String> args;

    public NativeLinkableInput(ImmutableList<SourcePath> inputs, ImmutableList<String> args) {

        this.inputs = inputs;
        this.args = args;
    }

    /**
     * Combine, in order, several {@link NativeLinkableInput} objects into a single one.
     */
    public static NativeLinkableInput concat(Iterable<NativeLinkableInput> items) {
        ImmutableList.Builder<SourcePath> inputs = ImmutableList.builder();
        ImmutableList.Builder<String> args = ImmutableList.builder();

        for (NativeLinkableInput item : items) {
            inputs.addAll(item.getInputs());
            args.addAll(item.getArgs());
        }

        return new NativeLinkableInput(inputs.build(), args.build());
    }

    public ImmutableList<SourcePath> getInputs() {
        return inputs;
    }

    public ImmutableList<String> getArgs() {
        return args;
    }

    @Override
    public boolean equals(@Nullable Object o) {

        if (this == o) {
            return true;
        }

        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        NativeLinkableInput that = (NativeLinkableInput) o;

        if (!inputs.equals(that.inputs)) {
            return false;
        }

        if (!args.equals(that.args)) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(inputs, args);
    }

}