exm.stc.tclbackend.tree.TclTree.java Source code

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Here is the source code for exm.stc.tclbackend.tree.TclTree.java

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/*
 * Copyright 2013 University of Chicago and Argonne National Laboratory
 *
 * 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 exm.stc.tclbackend.tree;

import org.apache.commons.lang3.StringUtils;

/**
 * The TclTree class hierarchy represents all Tcl constructs
 * necessary for Turbine code generation
 *
 * TclTree is the most abstract Tcl expression
 *
 * @author wozniak
 * */
public abstract class TclTree {
    int indentation = 0;
    static int indentWidth = 4;

    public abstract void appendTo(StringBuilder sb);

    /**
     * Append the body to the StringBuilder inside
     * curly braces.
     * @param sb
     */
    public void appendToAsBlock(StringBuilder sb) {
        sb.append("{\n");
        increaseIndent();
        appendTo(sb);
        decreaseIndent();
        indent(sb);
        sb.append("}");
    }

    public void indent(StringBuilder sb) {
        sb.append(StringUtils.repeat(' ', indentation));
    }

    public void setIndentation(int i) {
        indentation = i;
    }

    public void increaseIndent() {
        indentation += indentWidth;
    }

    public void decreaseIndent() {
        indentation -= indentWidth;
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder(2048);
        appendTo(sb);
        return sb.toString();
    }
}